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Converts multiple youtube links to mp3 files
Usage: ytmp3 "YTurl" "YTurl2" "YTurl3" "YTurlN" Uses the shift command to let you extract the .mp3 from as many youtube urls as you like (or wherever else youtube-dl is supported) *Requires youtube-dl Orginal chunk of code: youtube-dl -q -t --extract-audio --audio-format mp3 URL taken from here http://www.commandlinefu.com/commands/view/9701/convert-youtube-videos-to-mp3

sniff network traffic on a given interface and displays the IP addresses of the machines communicating with the current host (one IP per line)

Get technical and tag information about a video or audio file
MediaInfo supplies technical and tag information about a video or audio file. (sudo apt install mediainfo)

Stripping ^M at end of each line for files
That "^M" is Ctrl-M, which is a carriage return, and is not needed in Unix file systems. Where ^V is actually Ctrl-V and ^M is actually Ctrl-M (you must type these yourself, don't just copy and paste this command). ^V will not be displayed on your screen.

Recursive Search and Replace
Finds the string in every file in an entire directory and all its subdirectories and replaces it with a new string. Especially useful when changing a machine's IP address or hostname - run it on /etc.

geoip information
A function that takes a domain name as an argument

Download 10 random wallpapers from images.google.com

OSX command to take badly formatted xml from the clipboard, cleans it up and puts it back into the clipboard.
This command can be used with xclip or xsel for use on a linux box.

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"

List the URLs of tabs of the frontmost Chrome window in OS X
This also works with Safari if you just change the application name. Replace $ window 1 with $ windows to list the URLs of tabs in all windows instead of only the frontmost window. This also includes titles: $ osascript -e{'set o to""','tell app"google chrome"','repeat with t in tabs of window 1','set o to o&url of t&"\n"&" "&title of t&"\n"',end,end}|sed \$d .


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