Explore information related to centos
Ispconfig vs vestacp
This article will guide you on how to choose the best control panel for customers. Basically, many factors depends to choose the right panel like Ispconfig and Vestacp.
Vesta control panel (#VestaCP) is an open source hosting control panel, which can be used to manage multiple websites, create and manage email accounts, FTP accounts, and #MySQL databases, manage DNS records and more.
To Install And Use Vesta Control Panel:
1. Install SSH Client.
2. Choose The Configuration Panel.
3. Login to Putty and VestaCP Installation.
4. Create a new user.
5. Add a new domain and database.
6. Add Cloudflare nameservers.
7. Add files to your domain via FTP.
8. Repeat the process for all your websites.
ISPConfig is a free open-source control panel application that allows website owners to easily administer their sites, similar to cPanel and Plesk.
It also allows resellers to manage multiple accounts on multiple physical or virtual servers.
ISPConfig only runs on #Linux servers.
To log into ISPConfig:
Navigate to the URL of your ISPConfig system (e.g. https://www.domain.tld:81 or http://www.domain.tld:81; replace "www. domain. tld" appropriately) with your Browser and enter your user name and your password into the form "Login". Confirm by clicking on "Login".
Roundcube empty startup greeting
This article will guide you on methods to resolve #Roundcube empty startup greeting error which occurs due to many reasons which include improper configuration of SSL, network #problem, firewall #error and so on.
Roundcube is a webmail client with strong security features and extensive customization options from its plugin repository.
It is important to set Roundcube config file as follows:
$config['default_host'] = 'imaps://domain.tld';
// TCP port used for IMAP connections
$config['default_port'] = 993;
To fix cPanel Roundcube Webmail "An error occurred":
This error indicates a potentially corrupt index file.
1. establish an SSH session with the server and navigate to:
/home/<username>/mail/<domain name>/<email account name>/
2. Find dovecot.index and rename it to dovecot.index.bak.
OpenLDAP and phpLDAPadmin on Linux
This article will guide you on how to install #OpenLDAP and phpLDAPadmin on #Ubuntu. Also, we covered the prospective error affacting OpenLDAP and phpLDAPadmin and its solution as well.
#LDAP (Lightweight Directory Access Protocol) is an open and cross platform protocol used for directory services authentication. LDAP provides the communication language that applications use to communicate with other directory services servers.
#Kerberos is used to manage credentials securely (authentication) while LDAP is used for holding authoritative information about the accounts, such as what they're allowed to access (authorization), the user's full name and uid.
To access #phpLDAPadmin:
Point your browser to http://IP_OF_SERVER/phpldapadmin (IP_OF_SERVER is the actual IP address of your LDAP server).
From the main window, click the login button in the left pane.
When prompted, you will log into your DN and enter the password for the admin user created during the slapd reconfiguration.
FFmpeg on CentOS
This article will guide you on how to install FFMPEG on #CentOS and fix its related #errors. FFmpeg is a powerful tool that can do almost anything with #multimedia files.
FFmpeg is a standard package on many #linux systems.
You can check if it is installed with a #command like dpkg -s ffmpeg .
If it is not installed, you should be able to install with your system's package manager. i.e. sudo apt-get install ffmpeg or search 'ffmpeg' in the Software Center on Ubuntu.
To run #FFmpeg in #Linux:
1. Start by updating the packages list: sudo apt update.
2. Next, install FFmpeg by typing the following command: sudo apt install ffmpeg.
3. To validate that the package is installed properly use the ffmpeg -version command which prints the FFmpeg version: ffmpeg -version.
Install SQL Server 2019 on Linux
This article will guide you the process to install #MSSQL Server 2019 on #CentOS 7 and Ubuntu 16.04.
SQL Server 2019 #Developer is a full-featured free edition, licensed for use as a development and test database in a non-production environment.
SQL Server 2019 allows us to integrate data from structured and unstructured data sources.
We can now process diverse big data and relational data sources using Transact-SQL from SQL Server using PolyBase.
We can see below PolyBase support external databases.
SQL Server Express can be used in production (beware of the limitations, like the 10GB cap), but according to this link Express is available for Linux. SQL Server Express is available to use in Production.
Starting with SQL Server 2017, SQL Server runs on Linux. It's the same SQL Server database engine, with many similar features and services regardless of your operating system. It's the same SQL Server database engine, with many similar features and services regardless of your operating system.
To run a SQL script in #Linux terminal:
1. Open Terminal and type mysql -u to Open the MySQL command line.
2. Type the path of your #mysql bin directory and press Enter.
3. Paste your #SQL file inside the bin folder of mysql server.
4. Create a #database in MySQL.
5. Use that particular database where you want to import the SQL file.
Install WireShark CentOS
This article will guide you on how to install WireShark on #CentOS. WireShark is one of the leading #network analyzing tools. It helps in troubleshooting the traffic problems of a server and malicious activity.
Wireshark is an open-source, free network packet analyzer, used to capture and analyze network traffic in real-time.
Basically, with Wireshark you can capture and view data traveling through your network.
You can install WireShark with yum install wireshark-gnome .
After you install it, the Wireshark application will be at /usr/sbin/wireshark .
To install #wireshark on RHEL 8 / CentOS 8 Linux step by step instructions:
1. Install package called Whireshark using the dnf command. For a GUI Wireshark application execute: # dnf install wireshark To install Wireshark command line tool only execute: # dnf install wireshark-cli.
2. Launch Wireshark.
To install Wireshark from #terminal:
Open terminal and type the #commands:
i. sudo apt-get install wireshark.
ii. sudo dpkg-reconfigure wireshark-common.
iii. sudo adduser $USER wireshark.
iv. wireshark.
Monitor System Metrics with the TICK Stack on CentOS 7
This article will guide you on how the TICK stack can be a powerful tool for storing, analyzing, and visualizing time series data. To monitor InfluxDB _internal metrics in a production #cluster, use Telegraf and the influxdb input plugin to capture these metrics from the InfluxDB /debug/vars endpoint and store them in an external InfluxDB monitoring instance.
More about Kapacitor:
#Kapacitor is a native data processing engine for #InfluxDB 1. x and is an integrated component in the InfluxDB 2.0 platform.
Kapacitor can process both stream and batch data from InfluxDB, acting on this data in real-time via its programming language TICKscript.
A retention policy (RP) is the part of InfluxDB data structure that describes for how long InfluxDB keeps data.
InfluxDB compares your local server's timestamp to the timestamps on your data and deletes data that are older than the RP's DURATION .
A single database can have several RPs and RPs are unique per database.
OpenVPN on Linux
This article will guide you on steps to set up OpenVPN on Linux.
OpenVPN config files (. ovpn) offer an easy way to configure #OpenVPN on your computer to work with our servers. These files contain the correct cipher types, #Certificate Authority, Certificate, and Private Keys. You can use these files on Mac, Linux, #Windows, Android, and iOS.
By default the OpenVPN Access Server comes configured with OpenVPN daemons that listen on port 1194 UDP, and OpenVPN daemons that listen on port 443 TCP. While the best connection for an OpenVPN #tunnel is via the #UDP port, we implement TCP 443 as a fallback method.
To Set up OpenVPN Server on Ubuntu #Linux:
1. Find and note down your public IP address.
2. Download openvpn-install.sh script.
3. Run openvpn-install.sh to install OpenVPN server.
4. Connect an OpenVPN server using iOS/Android/Linux/Windows client.
5. Verify your connectivity.
Install XRDP Server
This article will guide you on steps to install XRDP #Server on #Ubuntu. To provide remote access via RDP, a Windows native protocol, XRDP behind the scenes uses #VNC, a remote access protocol more common in Linux.
After #xrdp is installed you can start the server with the following command:
Service xrdp start.
Service xrdp-sesman start (Thanks to Greg for pointing that out) — UPDATE!!
If want it to auto start after reboot you need to run this command also: update-rc.d xrdp enable (It will not start xrdp-sesman automatic).
To use XRDP Linux:
1. With #Ubuntu 18.04 first install xrdp: sudo apt-get -y install xrdp.
2. Next, one may adjust the configuration file: sudo nano /etc/xrdp/xrdp.ini.
3. Set encryption level to high: encrypt_level=high.
4. Next, allow just RDP through the local firewall: sudo ufw allow 3389/tcp.
Using CSF firewall to block countries
This article will guide you on how to block/allow countries in the CSF #firewall. CSF is used to restrict or allow countrywide IP ranges in the server using the country codes. For every country you want to deny, you just enter those letters in the field (separated by a comma). Once you're done, scroll to the bottom of the page and click CHANGE. This will restart the firewall, and you're now all set to go.
ConfigServe Firewall (#CSF) is a firewall configuration script created to provide better security for your server while giving you an easy to use and advanced interface for managing your #firewall settings in cPanel servers.
To limit the ability to connect on a specific port or ports to visitors with IP addresses originating in a specific country or countries, you must:
1. close the ports in the firewall.
2. define the country code allowed to connect on those blocked ports.
3. specify the blocked #ports to be opened for the specified country.
Install Vesta control panel in Ubuntu
This article will guide you on easy steps to install Vesta control panel in #Ubuntu. VestaCP is a control panel for Linux with many features that facilitate the administration of a #server.
Vesta Development team provides an installer script that automates setting up of Vesta hosting control panel on Ubuntu / Debian and RHEL based Linux distributions. Login to your Ubuntu / #Debian system and ensure the system is updated. Download #Vesta installer. Run install with sudo if you're logged in as standard user.
To install vestaCP on Ubuntu:
1. # Connect to your server as root via #SSH
ssh root@your.server
2. # Download installation script
curl -O http://vestacp.com/pub/vst-install.sh
3. # Run it
bash vst-install.sh
To change my VestaCP port:
i. conf file and change the port that NGINX listens on from 8083 to 2083 (or the port you chose to use). listen 2083;
ii. Once the port has been changed, press CTRL+X , followed by y , and then hit enter to save your changes.
iii. The final step is removing the firewall entry for the previous port we were using.
GlusterFS install CentOS 7
This article will guide you on the steps to install and setup #GlusterFS.
GlusterFS is a scalable #network filesystem suitable for data-intensive tasks such as cloud storage and media streaming.
GlusterFS has a client and #server component. Servers are typically deployed as storage bricks, with each server running a glusterfsd daemon to export a local file system as a #volume.
To install GlusterFS:
1. Have at least two nodes. CentOS 7 on two servers named "server1" and "server2".
2. Format and mount the bricks.
3. Installing GlusterFS.
4. #Iptables configuration.
5. Configure the trusted pool.
6. Set up a GlusterFS volume.
7. Testing the GlusterFS volume.
Configure and host an application in Apache web server on Ubuntu
This article will guide you on how to configure #Apache on #Linux. This includes #firewall configuration, managing Apache services, setting up virtual hosts, changing default listening ports, and allowing/denying specific IPs from accessing the #sites.
Apache #HTTP Server is a free and open-source web server that delivers web content through the internet. It is commonly referred to as Apache and after development, it quickly became the most popular HTTP client on the web.
The httpd. conf file is the main configuration file for the Apache web server. It's highly recommended to run Apache in standalone type for better performance and speed. ServerRoot "/etc/httpd" The option ServerRoot specifies the directory in which the configuration files of the Apache server lives.
On most systems if you installed Apache with a package manager, or it came preinstalled, the Apache configuration file is located in one of these locations:
1. /etc/apache2/httpd. conf.
2. /etc/apache2/apache2. conf.
3. /etc/httpd/httpd. conf.
4. /etc/httpd/conf/httpd. conf.
Enable firewalld in Centos 7 How to do it
This article will guide you on steps to enable firewalld on #centos 7 servers for our customers. The firewall is one of the most important features of webservers. The #firewalld supports both IPv4 and IPv6 #firewall #settings.
Never run the iptables service and FirewallD service at the same time! The #iptables service is now provided by a separate package called iptables-services: Stop and disable the firewalld service first. # systemctl stop firewalld.
The firewalld daemon manages groups of #rules using entities called "zones". Zones are basically sets of rules dictating what traffic should be allowed depending on the level of trust you have in the networks your #computer is connected to.
To use FirewallD:
1. Installing and Managing FirewallD.
2. To start the service and enable FirewallD on boot: sudo systemctl start firewalld sudo systemctl enable firewalld.
3. Check the firewall status.
4. To view the status of the FirewallD daemon: sudo systemctl status firewalld.
5. To reload a FirewallD configuration: sudo firewall-cmd --reload.
Imagick php install
This article will guide you on how to install #Imagick #PHP #extension. Imagick is the most popular PHP extension which helps to create edit convert, and/or manipulates images. ImageMagick is a free and open source, feature-rich, text-based and cross-platform image manipulation tool used to create, edit, compose, or convert bitmap images. It runs on #Linux, #Windows, #Mac Os X, iOS, Android OS, and many other operating systems.
To use Imagick with PHP in your server, you can easily achieve it with the following #command:
sudo apt-get install php-imagick.
php -m | grep imagick.
sudo service apache2 restart.
How Chmod 777 works
This article will guide you on how to give #Chmod 777 to folders and files in #Linux. We also discussed the risks and more information about file permissions.
If you are managing a Linux system, it is crucial to know how the Linux #permissions work.
You should never set 777 (rwxrwxrwx) permissions #files and #directories permissions. 777 means that anyone can do anything with those files.
To Give Root Privileges to a User in Linux:
1. Adding to Root Group using usermod. Let see how we can grant normal user root access by adding to root group.
2. Adding to #Root Group using Useradd Command.
3. Editing /etc/passwd file.
4. Setting as Sudo User.
Add User To Group in Linux
This article will guide you on how to add a #user to a #group in #Linux. The group permissions apply only to the group that has been assigned to the file or directory, they will not effect the actions of other users. The others permissions apply to all other users on the system, this is the permission group that you want to watch the most.
Groups can be thought of as levels of #privilege. A person who is part of a group can view or modify files belonging to that group, depending on the permissions of that file. User belonging to a group has privileges of that group, for example - sudo groups lets you run software as super user.
To view all groups present on the system simply open the /etc/group file. Each line in this file represents information for one group. Another option is to use the getent command which displays entries from #databases configured in /etc/nsswitch.
To Create a New Sudo User:
1. Log in to your server as the root user. #ssh root@server_ip_address.
2. Use the adduser command to add a new user to your system. Be sure to replace username with the user that you want to create.
3. Use the usermod command to add the user to the wheel group.
4. Test sudo access on new user account.
To List Users in Linux:
i. Get a List of All Users using the /etc/passwd File.
ii. Get a List of all Users using the getent Command.
iii. Check whether a user exists in the Linux system.
iv. System and Normal Users.
Ansible Playbook to Install WordPress with LAMP
This article will guide you on the step to follow to use #Ansible Playbook to install #WordPress with #LAMP on #Ubuntu 18.04.
In Ansible, the role is the primary mechanism for breaking a #playbook into multiple files. This simplifies writing complex #playbooks, and it makes them easier to reuse. The breaking of playbook allows you to logically break the playbook into reusable components.
To start using Ansible:
1. Prerequisites.
2. Install Ansible.
3. Establish a manual connection to a managed node.
4. Run your first network Ansible command.
5. Create and run your first network Ansible Playbook.
6. Gathering facts from network devices.
Install imagemagick on CentOS
This article will guide you on steps to #install #ImageMagick and fix its errors. Basically, ImageMagick is used to manipulate the digital images.
ImageMagick helps to create, edit, compose, or convert #bitmap images. It can read and write images in a variety of formats (over 200) including #PNG, JPEG, GIF, HEIC, TIFF, DPX, EXR, WebP, Postscript, PDF, and #SVG.
To install ImageMagick from the source:
1. First #download the latest version of the program sources - ImageMagick.
2. Unzip the package to a folder of choice.
3. In the folder where you have unzipped ImageMagick run the configuration script.
4. If no errors were found, you can start the install process.
Install Froxlor on CentOS 7
This article will guide you on steps to #install Froxlor on #CentOS 7 and also resolve common Froxlor #errors.
#Froxlor is a simple but powerful server administration #software for managing #domains, emails and files.
To install Froxlor web hosting control panel:
1. Ensure that your webserver serves /var/www.
2. Extract froxlor into /var/www.
3. Point your browser to http://[ip-of-webserver]/froxlor.
4. Follow the #installer.
5. Login as #administrator.
6. Adjust "System > Settings" according to your needs.
7. Choose your distribution under "System > Configuration".
8. Follow the steps for your services.
Yum http error 416 How to fix it
This article will guide you on steps to fix #yum #HTTP #error 416 which occurs while updating, installing, upgrading packages. This is rectified easily via disabling the delta #rpm problem, reinstalling a #package, clear #caching and so on.
To fix this error:
1. yum clean all
2. yum upgrade --exclude=polkit*
3. reboot
4. yum clean all
5. yum upgrade
List installed software Linux
This article will guide you on different methods to #list all #software, the number of #packages available on the server along with the method to copy them and use them when we reinstall our operating system(#OS).
Yum automatically refreshes the list of packages, whilst with apt-get you must execute a command 'apt-get update' to get the fresh packages.
To list of installed programs in #Linux:
1. Aptitude-based distributions (#Ubuntu, #Debian, etc): dpkg -l.
2. RPM-based distributions (#Fedora, #RHEL, etc): rpm -qa.
3. pkg*-based distributions (#OpenBSD, #FreeBSD, etc): pkg_info.
4. Portage-based distributions (#Gentoo, etc): equery list or eix -I.
5. pacman-based distributions (Arch Linux, etc): pacman -Q.
Add Glance Cloud images to OpenStack
This article will guide you on steps to add #Glance #Cloud images to #OpenStack with different #Linux distributions which enables users to discover, register, and retrieve virtual machine images.
After images are created they should be registered in Openstack Glance - #image operation service.
Upload Image Into Glance:
1. Replace <NAME> with the name that users will refer to the disk image by.
2. Replace <IMAGE_FILE> with the local path to the image file to upload.
Directadmin Unable to write users httpd conf configuration
This article will guide you on how to fix the #error, Unable to write user's httpd.conf in Directadmin which occurs when we try to add a #domain in #DirectAdmin.
The httpd. conf file is the main configuration file for the Apache web server. It's highly recommended to run Apache in standalone type for better performance and speed. ServerRoot "/etc/httpd" The option ServerRoot specifies the directory in which the configuration files of the Apache server lives.
Before you edit httpd.conf, you should first copy the original file to something like httpd.conf-old, for example.
By creating a #backup, you can recover potential mistakes made while editing the new configuration file.
Cant locate LWP UserAgent pm in @INC
This article will guide you on how to get rid of error "Can't locate LWP/UserAgent.pm in @INC" which occurs in the process of installing #applications like CSF in the DirectAdmin server or any other #Linux #distros.
libwww-perl (also known as LWP) is a collection of #Perl #modules that provide a simple and consistent programming interface (API) to the World-Wide Web.
In order to install and use this #package you will need Perl version
5.8.1 or better:
Some modules within this package depend on other packages that are distributed separately from Perl. We recommend that you have the following #packages installed before you install
libwww-perl:
i. Digest-MD5
ii. Encode-Locale
iii. HTML-Form
iv. HTML-Parser
v. HTML-Tagset
vi. HTTP-Cookies
vii. HTTP-Date
viii. HTTP-Message
ix. HTTP-Negotiate
x. libnet
xi. LWP-MediaTypes
xii. MIME-Base64
xiii. Net-HTTP
xiv. URI
xv. WWW-RobotRules
If you want to access sites using the https protocol, then you need to
install the LWP::Protocol::https module from CPAN.
Install Graylog on CentOS 7 How to do it
This article will guide you on steps to #Graylog on #CentOS 7 and an effective method to make the logs more structured and searchable.
Graylog is a leading centralized log management solution built to open standards for capturing, storing, and enabling real-time analysis of terabytes of #machine data.
Graylog is an open source log management platform which enables you to aggregate up to terabytes of log data, from multiple log sources, DCs, and geographies with the capability to scale horizontally in your data center, #cloud, or both.
To #Install Graylog 3 with Elasticsearch on CentOS 7:
1. Configure #SELinux.
2. Add required #repositories
3. Install #Java, #Elasticsearch, and #MongoDB.
4. Configure Elasticsearch for Graylog.
5. Install Graylog 3 on CentOS 7.
6. Start Graylog service on CentOS 7.
Backup and Restore Nagios Log Server
This article will guide you on the steps to perform #backup and #restore a #Nagios #Log #Server cluster. Taking Backup and Restore of Nagios Log Server helps not to lose any data as it is held in other instances.
Backup and recovery describes the process of creating and storing copies of #data that can be used to protect organizations against data loss. #Recovery from a backup typically involves restoring the data to the original location, or to an alternate location where it can be used in place of the lost or damaged data.
To do a backup and system restore:
1. Click Start.
2. Go to Control Panel.
3. Go to System and Security.
4. Click Backup and Restore.
5. At the Back up or restore your files screen, click Restore my files.
6. Browse to locate the backup file.
Install InfluxDB on CentOS 7
This article will guide you on steps to Install #InfluxDB on #CentOS 7. You can Turn any InfluxData #instance into a production-ready cluster that can run anywhere. Easily create and share a comprehensive monitoring solution.
InfluxDB is similar to a #SQL #database, but different in many ways. Relational databases can handle time series data, but are not optimized for common time series workloads. InfluxDB is designed to #store large volumes of time series data and quickly perform real-time analysis on that data.
The local InfluxDB configuration file is located here: Linux: /etc/influxdb/influxdb. conf. macOS: /usr/local/etc/influxdb.
To Install InfluxDB:
Option 1 : Download the InfluxDB archive via the browser.
Option 2 : Adding the #repositories to your package manager.
i – Start your InfluxDB service.
ii – Configure your InfluxDB instance.
iii – Test your InfluxDB instance.
iv – #Download InfluxDB 2.0 archive from the website.
OpenLDAP on Ubuntu Steps to install it
This article will guide you on the steps to #install and configure #OpenLDAP on #Ubuntu.
OpenLDAP is a open source implementation of #LDAP in Linux.
If it's your #server, you will know just by looking at the running services. When you are there, run #netstat and probably you will see LDAP listening only on localhost . Remotely, if the server is listening on #localhost , you cannot know just by running nmap , the port will not answer for the public #interface.
To Install and Configure OpenLDAP on #CentOS / #RHEL #Linux:
1. Install OpenLDAP Packages. On CentOS and RedHat, use yum install as shown below, to install the openldap related packages.
2. LDAP #Config Files. config.
3. Create olcRootDN Account as Admin.
4. Create olcRootPW Root Password.
5. Create olcSuffix #Domain Name.
6. Verify The #Configuration Files.
7. Start the LDAP Server.
8. Verify the LDAP Search.
Apache Performance Tuning via MPM Directives
This guide will help you to configure #MPM directives in the #Apache server. You can simply configure MPM #directives by logging into the server and create an optimization file and add the necessary directive change.
Starting with Apache 2.0, Apache extended its features with a selection of Multi-Processing Modules (#MPMs), which are responsible for binding to #network ports on the machine, accepting and handling the requests. These modules determine the basis of how Apache addresses multi-processing.
To know which MPM Apache is using:
1. Enable Apache mod_info.
2. Query the mod_info url, typically curl localhost/server-info.
3. The "Server Settings" section will show "MPM Name: #Worker"
4. Run httpd -V again. It will still show prefork, not worker.
How to Install OpenNMS on CentOS 8
This article will guide via a step-by-step procedure to #install OpenNMS in #CentOS.
OpenNMS is a free, Open Source network monitoring system that can be used to #monitor tens of thousands of unlimited devices with a single #instance.
It will discover and monitor the services or nodes automatically in your #network, or you can assign a particular service to monitor by OpenNMS.
To configure #OpenNMS:
1. Install OpenNMS Horizon. Add yum repository and import GPG key.
2. Initialize and set up #PostgreSQL. Initialization of the PostgreSQL database will start.
3. Initialize and start OpenNMS Horizon.
4. First Login and change default password.
How To Install MariaDB on Ubuntu Focal Fossa
This article will guide you on steps to install #MariaDB from the #Ubuntu #repositories and from the official MariaDB repositories. You can install MariaDB in two different ways.
To install MariaDB on Ubuntu, follow these steps:
1. Update #packages index. sudo apt update.
2. Once the packages list is updated, install MariaDB by issuing the following command: sudo apt install mariadb-server.
3. The MariaDB service will start automatically.
The default data directory for the MariaDB database server is /var/lib/mysql. The configuration file of MariaDB database server is /etc/mysql/mariadb. conf. d/50-server.
SQL Server and create a database on Ubuntu How to install
This article will guide you on how to #install MS SQL on #Ubuntu Server 18.04.
To Install #Microsoft SQL Server 2017:
1. Visit Microsoft's official SQL Server 2017 download page.
2. Select the edition you want to #download.
3. Click Download now below your selected edition.
4. The wizard will prompt you to select an installation type.
5. On the next page, select a directory for the installation folder.
To connect to the SQL Server using #SSMS:
i. From the Connect menu under the Object Explorer, choose the #Database Engine.
ii. Then, enter the information for the Server name (localhost), Authentication (SQL Server Authentication), and password for the sa user.
iii. Click the Connect button to connect to the SQL Server.
oVirt Guest Agent on CentOS 8 and RHEL 8 Steps to install
This article will guide you on how to install oVirt Guest Agent on CentOS and RHEL. oVirt / #RedHat V#irtualization guest agent provides information, notifications, and actions between the #oVirt web interface and the guest.
To install oVirt guest agent:
1. Log in to the Red Hat Enterprise Linux virtual machine.
2. Enable the Red Hat Virtualization Agent #repository.
3. Install the guest #agent and #dependencies: # yum install ovirt-guest-agent-common.
4. Start and enable the ovirt-guest-agent service.
5. Start and enable the qemu-guest-agent service.
NFS Server on RHEL CentOS 8 Steps to install and configure
This article will guide you on the steps to Install and Configure #NFS Server on #RHEL or #CentOS.
The terms client and server are used to describe the roles that a computer plays when sharing file systems. The NFS service enables any given computer to access any other computer's file systems and, at the same time, to provide access to its own file systems.
To install NFS server:
1. Install NFS #Kernel Server.
2. Create the #Export #Directory.
3. Assign server access to client(s) through NFS export file.
4. Export the shared directory.
5. Open #firewall for the client (s).
VirtualHost cannot occur within virtualhost section in WAMP
This article will guide on steps to fix #VirtualHost cannot occur within virtualhost section in #WAMP which occurs while we try to add VirtualHost #directive and reconfigure #vhost.
Directory directive works only for filesystem objects (e.g. /var/www/mypage, C:\www\mypage), while Location directive works only for URLs (the part after your site #domain name, e.g. www.mypage.com/mylocation).
To Configure name-based virtual #hosts:
1. Install Apache webserver. Make sure you have installed #Apache webserver.
2. Create web directory for each host.
3. Create demo web pages for each host.
4. Create configuration file for each host.
5. Enable virtual host configuration files.
6. Test Virtual hosts.
Manage a Linux Server with systemd
Like the init #daemon, #systemd is a daemon that manages other daemons, which, including systemd itself, are background #processes. systemd is the first daemon to start during booting and the last daemon to terminate during shutdown.
This article will guide you on how to manage #Linux server using systemd. Additionally, we saw the different commands used to Manage Linux serves with systemd. While systemd is compatible with SysV and Linux Standard Base (LSB) init scripts, systemd is meant to be a drop-in replacement for these older ways of getting a Linux system running.
To start (activate) a service , you will run the command 'systemctl start my_service. service', this will start the service immediately in the current session.
To enable a service at boot , you will run 'systemctl enable my_service. service'.
Using Cron to Automate Tasks on CentOS 8
This article will guide you on the steps to set up #Cron job on #CentOS 8 to help automate #tasks. Cron is a #clock daemon, whose name originates from #Chronos, the Greek word for time. It enables users to automate the execution of #commands, scripts (a group of commands) or programs at specified time intervals.
The simplest way to validate that cron tried to run the #job is to simply check the appropriate log file; the log files however can be different from system to system. In order to determine which log file contains the cron #logs we can simply check the occurrence of the word cron in the log files within /var/log .
Deploy Laravel using Nginx on Ubuntu
This guide will help to set up Laravel with #Nginx on #Ubuntu 16.04. Laravel is the most popular, free, and open-source #PHP #framework in the world, known for its expressive and elegant syntax.
To move laravel project from localhost to production server, do:
1. Zip your #laravel app files.
2. Export your app's #database then set it up on your server.
3. After you have uploaded your laravel app files, open the . env file found on the root.
4. That's it!, now check your live #site.
How to install Metricbeat on CentOS 7 to Gather Infrastructure Metrics
This article will guide you on the steps to install #Metricbeat and configure the Elastic Stack to collect and analyze system metrics. Metricbeat is configured using a #YAML configuration file. On Linux, this file is located at: /etc/metricbeat/metricbeat. yml. On #Docker, you will find it at: /usr/share/metricbeat/metricbeat.
Both #Filebeat and #Logstash can be used to send #logs from a file-based data source to a supported output destination.
Steps To Harden OpenSSH Client on Ubuntu 18 04
This article will guide you on how to harden #OpenSSH Client by following some quick and easy steps.
#Hardening of the #OS is the act of configuring an OS securely, updating it, creating #rules and #policies to help govern the system in a secure manner, and removing unnecessary applications and services. This is done to minimize a computer OS's exposure to threats and to mitigate possible #risk.
Steps to Edit Sudoers File in Linux Process to get it done
This article will guide you on how to edit #Sudoers File in Linux which involves #root privileges, with a special focus on editing the /etc/sudoers file. You can configure who can use #sudo #commands by editing the /etc/sudoers file, or by adding configuration to the /etc/sudoers. To edit the sudoers file, we should always use the #visudo command. This uses your default editor to edit the sudoers configuration.
HAProxy Logging with Rsyslog on CentOS 8
This article will guide you on how to set up #HAProxy Logging #Rsyslog with some quick and easy steps. HAProxy is installed with RightScale load #balancer ServerTemplates. Load-balancer servers are also known as front-end servers. Generally, their purpose is to direct users to available #application servers. HAProxy can be installed in front of them to provide load balancing and high availability.
Using Bpytop to monitor Linux and FreeBSD Resources
This article will guide you on how to use Bpytop Monitoring for Linux & FreeBSD Resources.
#Bpytop is a great utility which is useful on your #Linux, #macOS, and #FreeBSD as a #resource #monitor. It is much faster than bashtop and works pretty well as Python 3 is standard on many Unix boxes.
Steps to create a Self-Signed SSL Certificate for Apache in CentOS 8
This article will guide you on how to configure #Apache to serve encrypted requests using a self-signed SSL certificate and to redirect unencrypted HTTP requests to #HTTPS. Self-signed #certificates or certificates issued by a private CAs are not appropriate for use with the general public. It can only properly verify the identity of the server when it is signed by a trusted third party because any attacker can create a self-signed certificate and launch a man-in-the-middle attack.
Send NXLogs with SSL TLS to Nagios Log Server
This guide will guide you on how to send NXLogs with SSL/TLS to #Nagios #Log #Server. Encryption ensures that the traffic between the #Windows machine and Nagios Log Server is not sent in plain text.
Install and configure Grafana on CentOS 7
This article will guide you on the steps to #install #Grafana on #CentOS 7 which is a #visualization and #analytics #monitoring software. Grafana is Free and Open Source which Runs on all major #OS operating systems.
Step by step process to Secure Apache with Lets Encrypt on CentOS 8
This article will guide you on the process to secure #Apache with Let’s Encrypt by installing Let's Encrypt #Certbot client, downloading #SSL #certificates for the #domain, and setting up automatic certificate renewal.
The objective of Let's Encrypt and the #ACME protocol is to make it possible to set up an #HTTPS server and have it automatically obtain a browser-trusted certificate, without any human intervention.
YUM History command Ways to use it
This article will guide you on #YUM history #command in #Linux which provides a detailed history of YUM #transactions in order to find out information about installed packages and those that where removed/erased from a #system.
The yum history command allows users to review information about a timeline of Yum transactions, the dates and times they occurred, the number of packages affected, whether transactions succeeded or were aborted, and if the RPM #database was changed between transactions.
How To Troubleshoot Common HAProxy Errors
This article will guide you on the different methods to #troubleshooting and fix common #HAProxy errors which can range from diagnosing #errors with the service itself to locating misconfigured options for modules.
ifconfig centos 7
This article will guide you on the steps to #install #ifconfig in #CentOS using the yum #package #manager.
The ifconfig command can tell you a lot about your Unix server's connection to your #network and the role it's playing in both generating and receiving network traffic.
Install and Configure ModSecurity on Ubuntu
This article will guide you on the steps to perform #ModSecurity installation on #Ubuntu which involves enabling Core Rule Set to handle malicious activities.
NFS server not responding timed out error How to fix
This article will guide you on how to fix #NFS server not responding timed out #error which occurs when there is a heavy #server or #network load.
Why NFS is not working?
i. Check the file /proc/fs/nfs/exports and make sure the volume and client are listed correctly.
ii. Finally, try to ping the client from the server, and try to ping the server from the client.
iii. If this doesn't work, or if there is packet loss, you may have lower-level network problems.
Install Prometheus Network Monitoring Server on CentOS 7
#Prometheus collects metrics from targets by scraping 3metrics #HTTP endpoints. Since Prometheus exposes #data in the same manner about itself, it can also scrape and monitor its own health.
This article will guide you on the steps to perform #installation of Prometheus on #CentOS 7 along with the method used for the #setup.
Resizing the Nagios VM disk size for CentOS 7
This article will guide you on the process to resize the #Nagios #VM #disk size.
Sync Two CentOS 8 Servers Using File Replication
The #sync command forces an immediate write of all cached data to disk. Run sync if you anticipate the system to be unstable, or the storage device to become suddenly unavailable, and you want to ensure all data is written to disk. Individual files may be synced, or the entire filesystem containing the specified files.
This article will guide you on the right steps to sync two #CentOS 8 #servers using file replication.
Backup, Restore and Migrate a MongoDB database on CentOS 8
MongoDB is highly scalable, using shards. Horizontal scalability is a big plus in most #NoSQL databases. MongoDB is no exception. It is also highly reliable due to its replica sets, and the data is replicated in more nodes asynchronously.
This article will guide you on the steps to perform #backup, #restore and #migrate a #MongoDB #database on #CentOS 8.
Steps to Install Pure-FTPD on Ubuntu 18.04 LTS Server
#Pure-FTPd is a fast, production-quality, standard-conformant #FTP (SSL/TLS) server, based upon Troll-FTPd.
This article will guide you through the processes to install Pure-FTPd on your #Ubuntu server.
Zimbra Multi-Server Installation on CentOS 7
This article will help you to go about Installing a single server in Zimbra by following some steps.
Different methods to List Users in CentOS 7
This article will guide you on the different methods to list users in CentOS 7.
Virtualmin common installation errors
This article will guide you on the different common errors in Virtualmin / Webmin and their fixes.
Install Squid Proxy on CentOS 7
This guide will show you the steps to install squid on Centos 7 as well as configure the port and adjusting the access control list.
Install DHCP Server Client on Centos
This article will guide you on the steps to install and configure a DHCP server on CentOS 8.
Major effects of shifting focus to CentOS Stream
This article is about the major effects of shifting focus to the CentOS Stream which is a sudden move by Red Hat.
Install Kamailio SIP proxy server on CentOS 7 in a few steps
This article will guide you on the steps to install and configure Kamailio sip proxy on CentOS.
RM cannot remove read-only file system tips to fix
This article will guide you on how to fix 'rm cannot remove the read-only file system' error by simply removing files from the read-only file system.
Install Nagios XI in an offline environment
This article will guide you on how to install Nagios XI in an offline environment using powershell.
TigerVNC Server installation and configuration
This article will guide you on how to install TigerVNC server CentOS 7.
Steps to Install Terraform On Ubuntu
This guide will show you how to install terraform on CentOS 7/Ubuntu 18.04.
Puppet installation on CentOS 7
This article will guide you through the steps you need to follow to get Puppet installed and configured on CentOS 7 Machine.
Htop installation on Linux
This article will show you how to install Htop across different Linux Distributions and Operating System.
Odoo installation on Centos
This article will guide you on how to install Odoo software on CentOS 7. Odoo is a very popular business software for managing business application.
Enable Epel repository on Linux
This article will show you how to enable EPEL repository on different Linux distribution. EPEL repo can be installed with the yum utility on CentOS and RHEL.
VirtualBox installation on CentOS 7
This article will help you to install VirtualBox on Centos. VirtualBox Software helps to create and run virtual machines on a single hardware machine.
How to Fix Boot Hole vulnerability CVE-2020-1073
Just recently, on the 29th, July 2020, Popular Linux Distribution RedHat announced that there was a great security concern in the grub2 (CVE-2020-1073) version.
Method to upgrade MySQL in VestaCP
It is very important to upgrade your OS MySQL database to the latest version so as to keep the system more secured and to enjoy the latest features.
Setup openvas on linux Debian and Ubuntu
OpenVAS software framework is a great security tool checking if the system is vulnerable by means of scanning and Management. It helps to safeguard the server from unauthorized access.
