Commands by hansgruber (1)

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Backup file, create dir and set perms in one shot
Prior to working on/modifying a file, use the 'install -m' command which can both copy files, create directories, and set their permissions at the same time. Useful when you are working in the public_html folder and need to keep the cp'd file hidden.

Purge configuration files of removed packages on debian based systems

shell bash iterate number range with for loop

Silently Execute a Shell Script that runs in the background and won't die on HUP/logout
This command runs your shell script in the background with no output of any kind, and it will remain running even after you logout.

Unite pdf files
pdfunite is a part of the poppler-utils. poppler-utils package is only 150KB. The alternative - pdftk package is 14MB! Install poppler-utils if you need simple pdf operation commands like unite, separate, info, text/html conversions

Find last reboot time
Specific to OSX.

encode image to base64 and copy to clipboard
I use it for embedding images in CSS for Stylish, the Firefox addon. Thought it might be useful to others.

Look up the definition of a word
A bash function might also be useful: $ dict() { curl dict://dict.org/d:$1; } Or if you want less verbose output: $ dict() { curl -s dict://dict.org/d:$1 | perl -ne 's/\r//; last if /^\.$/; print if /^151/../^250/'; }

Find and copy scattered mp3 files into one directory
No problem with word splitting. That should works on many Unix likes.

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

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