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find an unused unprivileged TCP port
Not really better - just different ;) There's probably a really simple solution out there somewhere...

Find the package that installed a command

Install a LAMP server in a Debian based distribution
The execution of this command will install a LAMP server (Linux, Apache, MySQL and PHP) in a Debian based distribution. For example, in Ubuntu.

Find the process you are looking for minus the grepped one
faster ;) but your idea is really cool

tar+pbzip2 a dir

password generator
make password randomly, default 8 chars, using bash3.X only, no external program.

Recursively remove directory with many files quickly
rsync'ing an empty directory over a directory to be deleted recursively is much faster than using rm -rf, for various reasons. Relevant only for directories with really a lot of files.

Find files and list them sorted by modification time
This uses the ability of find (at least the one from GNU findutils that is shiped with most linux distros) to display change time as part of its output. No xargs needed.

Copy stdin to your X11 buffer
Have you ever had to scp a file to your work machine in order to copy its contents to a mail? xclip can help you with that. It copies its stdin to the X11 buffer, so all you have to do is middle-click to paste the content of that looong file :)

count IPv4 connections per IP
usefull in case of abuser/DoS attacks.


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