How to show memory usage (Ubuntu)
Always very useful: A simple command to show memory usage (Ubuntu / linux distros).
cat /proc/meminfo
This article was written quite a while ago (8 years), please keep this in mind when using the information written here. Links, code and commands might be outdated or broken.
Random articles
Useful basic linux stuff: Show kernel version, distribution name and distribution version on Ubuntu systems
EOL lists of Ubuntu, Debian and CentOS for your server plannings
Best introduction to unix command line / bash ever (by André Augusto Costa Santos)
How to setup a (or multiple) server/LAMP-stack inside a virtual machine for local development with Vagrant and PuPHPet- How to enable mod_rewrite in Ubuntu 12.04 LTS
How to install php-login-one-file on Ubuntu 12.04 LTS
How to install PHP curl extension (in 5 seconds)
PHPMyAdmin not found after installation ? Here’s a fix (Ubuntu 12.04) !- A super-simple Vagrant LAMP stack bootstrap (installable with one command)