Commands tagged s3 (4)

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Add thousand separator with sed, in a file or within pipe
Does not necessarily require a file to process, it can be used in a pipe as well: $ cat filename | sed -e :a -e 's/\(.*[0-9]\)\([0-9]\{3\}\)/\1,\2/;ta' I don't remember where I copy/pasted this from, I wish I credited the original author

Listen to a file
replace "/usr/src/linux/kernel/signal.c" with any file you want and listen to its output ! :P you can also replace "cat" with "echo" or anything you can come up with have fun :-}

ROT13 whole file in vim.
gg puts the cursor at the begin g? ROT13 until the next mov G the EOF

Fibonacci numbers with awk
recursive version, "pure" AWK

determine if tcp port is open
for udp nmap -sU -p 80 hostname

Get CPU thermal data on MacOS

create a backup for all directories from current dir
Create backup (.tar.gz) for all first-level directory from current dir.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Right-align text in console using pipe like ( command | right )

Swap a file or dir with quick resotre
This lets you replace a file or directory and quickly revert if something goes wrong. For example, the current version of a website's files are in public_html. Put a new version of the site in public_html~ and execute the command. The names are swapped. If anything goes wrong, execute it again (up arrow or !!).


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