Commands by lineak (3)

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execute a command in case of success or execute a command in case of failure

Show memory usage of all docker / lxc containers

Find the package that installed a command

check open ports without netstat or lsof

Truncate 0.3 sec from an audio file using sox
Using this command one can cut a piece from the end of an audio file.

add the result of a command into vi
':r!ls -l' results in listing the files in the current directory and paste it into vi

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" }

Display command lines visible on commandlinefu.com homepage
Uses the fabulous Hpricot library to parse HTML from Ruby. Extracts all elements of "command' class and displays unescaped text from inside these elements. The following command can help install dependencies (apart from Ruby itself) $ gem sources -a http://gems.github.com && sudo gem install why-hpricot

Extract audio stream from an AVI file using mencoder
This commands saves the output in the audio directory. The portion ${file/%avi/mp3} uses bash string replacement to replace the avi to mp3 within the ${file} variable.

recursively walk down no more than three levels and grab any file with an extension of mp3, mpg, mpeg, or avi


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