Difference between Ubuntu apt-get autoclean, clean, autoremove commands – it is important to know the difference.
Cleaning up with apt-get – how to clean up with apt clean command
Linux << heredoc syntax info – great link has lots of good linux information
Here is an excellent link to a shell command cheatsheet. This lists the most commonly used shell programs.
An A-Z Index of the Linux command line: bash + utilities. – about the same as the list of shell commands above.20 Shell Scripting Questions for Practice
Awesome linux software – a list/article about awesome useful linux programs
Understanding Shell Initialization Files and User Profiles in Linux
20 Shell Scripting Questions for Practiceuses opensshLinux visudo command
Linux /etc/profile file information
Understanding a little more about /etc/profile and /etc/bashrc20 Shell Scripting Questions for Practice
Tutorialspoint Linux tutorials and really good information.20 Shell Scripting Questions for Practice
How to Use Sudo and the Sudoers File – very good article
Ubuntu Environmental variables – Ubuntu Documentation link
How to prompt for input from user in a linux shell script – article 20 Shell Scripting Questions for Practicecovers two ways to prompt users for input in shell scripts.
How to prompt and read user input in a Bash shell script – A good example of a script that prompts users for input and uses it.
Bash read builtin command – this command is built into bash meaning available without installing etc.
Linux while loop explained with examples of alternate syntaxes
20 Shell Scripting Questions for Practice – article showing how to prompt users for input and how to answer prompts.