This is a draft cheat sheet. It is a work in progress and is not finished yet.
Monitoring
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watch -n 5 'ntpq -p' Issue the 'ntpq -p' command every 5 seconds and display output
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Filtering
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egrep '(Tom|Dan) Savage' file Print lines contain 'Tom Savage' or 'Dan Savage'
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grep -irl 'keyword' * Print all files name which contains keyword (case-insensitive, search from current folder recursively )
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head -20 file | tail -10 Print lines 11 t0 20 of file
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Editing
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:put=readfile('/path/to/foo/foo.c')[2:7] In vi, read lines 3 to 8 in foo.c and insert the lines to current file after current cursor line
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Creating
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ln -sv target/existing/directory new_link_to_create Create a soft link file to existing folder
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