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Lock your KDE4 remotely (via regular KDE lock)
Forgot to lock your computer? Want to lock it via SSH or mobile phone or use it for scheduled lock? TIP: Make a alias for this (e. g. as "lock"). I found some howtos for ugly X11 lock, but this will use regular KDE locking utility. Note that KDE 3 is using utility with another name (I guess with the same argument --forcelock) Tested on Kubuntu 8.10. Stay tuned for remote unlock.

Release memory used by the Linux kernel on caches
The Linux kernel uses unused memory in caches. When you execute "free" you never get the "real" available memory.

Google text-to-speech in mp3 format

Watch the progress of 'dd'
Pressing ctrl-t will display the progress

Getting the ip address of eth0

Get acurate memory usage of a Process in MegaBytes

See a full list of compiler defined symbols
From http://lists.debian.org/debian-devel/2001/01/msg00971.html .

Rips CDs (Playstation, etc.) and names the files the same as the volume name

Remove all but One
$ rm-but() { ls -Q | grep -v "$1" | xargs rm -r ; } Add this to your .bashrc file. Then whenever you need to remove all files/directories but one from present working directory. Run: $ rm-but Notes: 1. This doesn't affect the hidden files. 2. Argument is actually as string. And all files/directories having this string in there name are left untouched.

Generate pretty secure random passwords
These are my favourite switches on pwgen: -B Don't include ambiguous characters in the password -n Include at least one number in the password -y Include at least one special symbol in the password -c Include at least one capital letter in the password It just works! Add a number to set password length, add another to set how many password to output. Example: pwgen -Bnyc 12 20 this will output 20 password of 12 chars length.


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