Commands by jlbknr (2)

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list all files in a directory, sorted in reverse order by modification time, use file descriptors.
It's both silly, and infinitely useful. Especially useful in logfile directories where you want to know what file is being updated while troubleshooting.

commentate specified line of a file
used when modify several configuration files with a single command

One line Perl Script to determine the largest file sizes on a Linux Server
This one line Perl script will display the smallest to the largest files sizes in all directories on a server.

export iPad App list to txt file
This will generate the same output without changing the current directory, and filepath will be relative to the current directory. Note: it will (still) fail if your iTunes library is in a non-standard location.

Record audio and video from webcam using ffmpeg
Record from a webcam, audio using ALSA encoded as MP3, video as MPEG-4.

Python extract json

watch the previous command
If you just executed some long command, like "ps -aefww | grep -i [m]yProcess", and if you don't want to retype it or cycle backwards in history and waste time quoting it, then you can use history substitution.

Debug SSH at the Maximum Verbosity Level
When debugging an ssh connection either to optimize your settings ie compression, ciphers, or more commonly for debugging an issue connecting, this alias comes in real handy as it's not easy to remember the '-o LogLevel=DEBUG3' argument, which adds a boost of debugging info not available with -vvv alone. Especially useful are the FD info, and the setup negotiation to create a cleaner, faster connection.

Binary search/replace
Replace all instances of "A" with "B" in file "source" saved as file "destination". !! IF A/B is multi-byte, then separate bytes with spaces like so: "s/20\ 0A/00/g".

List all authors of a particular git project
List everyone who committed to a particular project, listed alphabetically. To list by commits, add -n to the shortlog.


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