The UNIX/Linux environment is a rich collaboration of tools, tricks, and jokes built by generations of users with widely varying levels of ability. While basic competence is achievable within a short period of time (i.e. "Just 5-10 years to learn the rules and only a couple lifetimes to master.") it's easy to become dependent on a few commands when other interesting or more suitable tools are readily available:
# find / | grep ifconfig
vs
$ whereis ifconfig
$ man ls
vs
$ pinfo ls
In this spirit I recommend the following links (not surprisingly, Dave's favorite AWK is listed in both).
Reddit thread:
Give Me That One Command You Wish You Knew Years Ago
Beware the spelling errors:
Advanced Unix Commands
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