This may seem like a long command, but it is great for making sure all file permissions are kept in tact. What it is doing is streaming the files in a sub-shell and then untarring them in the target directory. Please note that the -z command should not be used for local files and no perfomance increase will be visible as overhead processing (CPU) will be evident, and will slow down the copy.

You also may keep simple with, but you don't have the progress info:

Remove dashes, also validates if it's a valid UUID (in contrast to simple string-replacement)

Deletes files older than "n" minutes ago. Note the plus sign before the n is important and means "greater than n". This is more precise than atime, since atime is specified in units of days. NOTE that you can use amin/atime, mmin/mtime, and cmin/ctime for access, modification, and change times, respectively. Also, using -delete is faster than piping to xargs, since no piping is needed.

If your site is struck with the white screen of death you can find the syntax error quickly with php lint

used to output the last argument. www.fir3net.com

make multiple directories within bash. www.fir3net.com

Use this command to determine what version of MythTV you are running on a Debian system. Tested on a Mythbuntu installation.

sed '$ d' foo.txt.tmp

...deletes last line from the file

Shred can be used to shred a given partition or an complete disk. This should insure that not data is left on your disk

Boot without CD-Rom:

qemu fedora.qcow -boot c -net nic -net user -m 196 -localtime

Modify the script for your username and password, and save it as a script. Run the script, and enjoy ./tweet

This is the simple revision number on stdout, that can be fed to any useful/fun script of yours. Setting LC_ALL is useful if you use another locale, in which case "Revision" is translated and cannot be found. I use this with doxygen to insert my source files revisions into the doc. An example in Doxyfile:

FILE_VERSION_FILTER = "function svn_filter { LC_ALL=C svn info $1 | grep Revision | awk '{print $2}'; }; svn_filter"

Share your ideas about what to do with the revision number !

Use this if you can't type repeated killall commands fast enough to kill rapidly spawning processes.

If a process keeps spawning copies of itself too rapidly, it can do so faster than a single killall can catch them and kill them. Retyping the command at the prompt can be too slow too, even with command history retrieval.

Chaining a few killalls on single command line can start up the next killall more quickly. The first killall will get most of the processes, except for some that were starting up in the meanwhile, the second will get most of the rest, and the third mops up.

This grabs all lines that make an instantation or static call, then filters out the cruft and displays a summary of each class called and the frequency.