Commands by pkozelka (2)

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Quick network status of machine
credit to tumblr engineering blog @ http://engineering.tumblr.com/

Multi-thread any command
For instance: $ find . -type f -name '*.wav' -print0 |xargs -0 -P 3 -n 1 flac -V8 will encode all .wav files into FLAC in parallel. Explanation of xargs flags: -P [max-procs]: Max number of invocations to run at once. Set to 0 to run all at once [potentially dangerous re: excessive RAM usage]. -n [max-args]: Max number of arguments from the list to send to each invocation. -0: Stdin is a null-terminated list. I use xargs to build parallel-processing frameworks into my scripts like the one here: http://pastebin.com/1GvcifYa

switch case of a text file

Figure out what shell you're running

find all open files by named process
lists all files that are opened by processess named $processname egrep 'w.+REG' is to filter out non file listings in lsof, awk to get the filenames, and sort | uniq to remove duplciation

Given $PID, print all child processes on stdout
Simpler.

Search some text from all files inside a directory

Recursive Ownership Change
Changing files ownership in a directory recursivley from a user to another

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

pretend to be busy in office to enjoy a cup of coffee
This will turn it in an infinite loop and also shows random words from a file, so it won't be the same each time and also not just a number.


Stay in the loop…

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