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Links to Resources
General Server FAQ
Sysadmin's Unixersal Translator (ROSETTA STONE)
Videos:
Adrianna's TLDR series on YouTube for Linux Administration
Linux administration quick reference PDF
Linux System Administration and Configuration includes tutorials
Working with variables on Linux machines
How to Reboot your machine safely
How to find information about your Kernel
How to examine partitions
How to manage and change your Linux Environment
Linux tips, tricks and ways to help you do things faster
15 useful command line tools and tricks
10 command line tools
Linux Control Sequence tricks
Tricks to help you master the command line on Linux
7 commands to help you find things on Linux
6 command line tricks to do less work
Tool/Command specific help
Video:
How to run command loops
Video:
How to use the find command
Video:
How to use the top command
Video:
How to use the alias command
Video:
How to use the history command
Video:
How to use the wc command
Video:
How to terminate a process
Video:
How to use the nslookup command
Video:
How to use the groups command
Linux Command line history
How to use the ls command
How to use umask
5 tricks for using the sudo command
Other General references that might be helpful
What is /dev/null ?
Video:
How to use /dev/null
What are Run Levels in Linux
Examining partitions on Linux systems
The Linux System Administrator's Guide
Comics by @b0rk to help explain things in a more visual way.
Linux Challenges
Needs free registration:
Hacker Rank Challenges
Free tutorials and challenges, includes easy to challenging options from Linux Journey