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commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

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Install pip with Proxy
Installs pip packages defining a proxy

Insert the last argument of the previous command

run shell with your commandlinefu.com's favourites as bash_history
This makes your commandlinefu.com's favorites appear as most recent commands in your history.

Set all CPU cores' CPU frequency scaling governor to maximum performance

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

Convert seconds to [DD:][HH:]MM:SS
Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Sets shell timeout
Useful in root's .profile - will auto-logout after TMOUT seconds of inactivity. Close after `seconds` inactive. export TMOUT=seconds (unefunge)

Monitor Linux/MD RAID Rebuild

generate iso

Record MP3 audio via ALSA using ffmpeg
Record audio to an MP3 file via ALSA. Adjust -i argument according to arecord -l output.


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