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Mount partition from image (without offset mount)

Tail postfix current maillog and grep for "criteria"
Tail curren postfix maillog.

Write comments to your history.
A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.

Find dead symbolic links
-L tells find to follow symbolic links, so -type l will only return links it can't follow (i.e., those that are broken).

Minimize Apps When Middle Clicking on Titlebar
Middle click on titlebar to minimize apps

determine if tcp port is open
@putnamhill, no need if statement in that case. && is a AND and || is a OR

remove lines which are longer than 255

Find the package that installed a command

recursive search and replace old with new string, inside files
This command find all files in the current dir and subdirs, and replace all occurances of "oldstring" in every file with "newstring".

The NMAP command you can use scan for the Conficker virus on your LAN
This was posted on reddit. replace 192.168.0.1-256 with the IP's you want to check.


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