Commands by greenmang0 (1)

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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.

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Rotate a pdf by 90 degrees CW

Efficiently print a line deep in a huge log file
Sed stops parsing at the match and so is much more effecient than piping head into tail or similar. Grab a line range using $ sed '999995,1000005!d' < my_massive_file

Search for a string inside all files in the current directory
shorter typing with no need to use xargs.

Convert tab separate file (TSV) to JSON with jq
With this command you can convert a tab separate file (TSV) into a JSON file with jq. For example, this input.tsv i-0b9adca882e5e6326 172.16.0.188 i-088dd69e5c3624888 172.16.0.102 i-0e70eac180537d4aa 172.16.0.85 will produce the showed output.

List bash functions defined in .bash_profile or .bashrc
http://stackoverflow.com/questions/2625783/listing-defined-functions-in-bash#2627461

Determine an image's dimensions
Simple use of ImageMagick identify function.

Go to the previous sibling directory in alphabetical order
Based on linkinpark342 suggestion. Sometimes you have to browse your way through a lot of sub-directories. This command cd to the previous sub-directory in alphabetical order. For example, if you have the directories "lectures/01-intro", "lectures/02-basic", "lectures/03-advanced" and so on, and your PWD is "02-basic", it jumps to "01-intro".

List available upgrades from apt (package names only)
Usefull if you only want to see the package names, or if you want to use them in a script.


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