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.
Deploy Node js Application to DigitalOcean Server
This article will guide you on how to deploy node.js application to #DigitalOcean Server.
To Deploying #Node . js application to DigitalOcean — Setting up the #server:
1. Getting familiar with Digital Ocean and creating your first #droplet.
2. Setting up #SSH and connecting to your server from your local #machine.
3. Setting up a simple Express.js web-server in local machine.
4. Using #Git to deploy your code to server.
Lets encrypt new auth status 429 error
This article will guide you on methods to troubleshoot and fix 429 error which occurs due to creation of multiple #SSL #certificates for a #domain.
1. 429 means you went over the rate #limits.
2. You issued 5 certificates in the last week. This is why you get a #429 answer.
3. You need to wait two days to get another one. do you have access to the certificates you issued?
451 qq trouble in home directory 4 3 0 email error
This article will guide you on steps to fix 451 qq trouble in home directory #email #error which occurs when the #SPF check for the sender fails. #SMTP #error from remote #mail server after end of data.
Captcha Option error in DNN Websites
This article will guide you on how to fix #Captcha Option #error in DNN Websites. We resolved the image not visible error even after enabling the Captcha option by editing the web.config file and checking the ASP.net version in DNN websites.
#DNN #websites have systematically been targeted for #Spam New User Registrations. There has been some discussion around the how and why, and as much as we can tell, the problem is this:
1. Some script kiddy has bothered to write a bot that finds DNN websites. It is not even a good bot, because it is not capable of validating registrations to automated active email addresses. (If you are the creator of the bot… “YOU ARE DOING IT WRONG” as it is not going to bring the Google results you are looking for.)
2. The bot will attempt access to: www.yoursite.com /?ctl=Register
