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commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

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Advanced python tracing
Trace python statement execution and syscalls invoked during that simultaneously

Change every instance of OLD to NEW in file FILE
Very quick way to change a word in a file. I use it all the time to change variable names in my PHP scripts (sed -i 's/$oldvar/$newvar/g' index.php)

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

Delete only binary files in a directory
Please note that binary file checking is NOT perfect. So, use it with caution. It does not delete hidden files whose name has a leading '.' character. And it regards an empty file as a binary file.

Ultra fast public IP address lookup using Cloudflare's 1.1.1.1

See system users

Clone current directory into /destination verbosely
Copy every file from current directory to destination preserving modification time.

Show directories in the PATH, one per line
This version uses Pipes, but is easier for the common user to grasp... instead of using sed or some other more complicated method, it uses the tr command

Install your ssh key file on a remote system

load changes without logging in and out vim
src: daily vim blog


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