Bash

bashpipeslinuxunix

Pipes man

curl -s google.com | vim -
git diff | hg import -

1. Pipes
2. Loops
3. Subshells

Which letters are NOT used as ls switches.

function args() { man ls | col -b | grep '^[[:space:]]*ls \[' | awk -F '[][]' '{print $2}'}
python -c "import string; print set(string.lowercase) - set('`args`')"

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