Commands using uniq (255)

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Search some text from all files inside a directory

Stop procrastination on Facebook.com
or echo '127.0.0.1 facebook.com' | sudo tee -a /etc/hosts Do not execute this command if you don't know what you are doing.

Sets shell timeout
Useful in root's .profile - will auto-logout after TMOUT seconds of inactivity. Close after `seconds` inactive. export TMOUT=seconds (unefunge)

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"

lists files and folders in a folder
lists files and folders in a folder with summary.

Extended man command
This microscript looks up a man page for each word possible, and if the correct page is not found, uses w3m and Google's "I'm feeling lucky" to output a first possible result. This script was made as a result of an idea on a popular Linux forum, where users often send other people to RTFM by saying something like "man backup" or "man ubuntu one". To make this script replace the usual man command, save it as ".man.sh" in your home folder and add the following string to the end of your .bashrc file: alias man='~/.man.sh'

Get the size of all the directories in current directory (Sorted Human Readable)
This allows the output to be sorted from largest to smallest in human readable format.

ping a host until it responds, then play a sound, then exit
This allows for sleeping in between pings. Also, espeak needs to be installed.

List hostnames of all IPs

Filter the output of a file continously using tail and grep
The OPs solution will work, however on some systems (bsd), grep will not filter the data, unless the --line-buffered option is enabled.


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