Cheat Sheets & Quick References

Command-line

Files, processes, networking, permissions, packages — the daily-use verbs.

Variables, conditionals, loops, pipes, redirection, expansion, traps.

git

Branching, merging, rebasing, stashing, undoing — what you need this week.

:wq

Modes, motions, operators, registers, search and substitution.

/^/

Anchors, character classes, quantifiers, lookaround, and flags.

* *

The five-field expression, special strings, and the gotchas that bite production.