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Permanent mysql ssh tunnel to server

Output as many input
Output of a command as input to many

validate the syntax of a perl-compatible regular expression
Place the regular expression you want to validate between the forward slashes in the eval block.

Go to parent directory of filename edited in last command
Uses the last argument of the last executed command, and gets the directory name from it. Use $!:t for the filename alone, without the dirname.

Change prompt to MS-DOS one (joke)
This one eliminates the additional backslash at the end (which is not necessary)

Quick way to sum every numbers in a file written line by line
If you have a file full of numbers written line by line, you can sum every line to get the total. With a file like this: 3443535 9878977 67554 987798 232324 you will got: 14610188

Create a mirror of a local folder, on a remote server
Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

Clear terminal Screen
Probably the quickest / easiest way to clear the screen.

Count all conections estabilished on gateway

Execute a command with a timeout


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