The uuencode utility will encode your file so that it can be sent as an attachment to an email. It is part of the sharutils package in RHEL/CentOS/Fedora.

Note, this works because smtp is running

I used an flv in my example, but it'll work on any file ffmpeg supports. It says it wants an output file, but it tells what you want to know without one.

This converts all m4a files in a dir to flv. You can just swap the m4a bit to anything else ffmpeg supports though, and it'll work.

This is handy for making screenshots of all your videos for referring to in your flv player.

Important to know: a valid date will return 0, otherwise 1!

Continue with:

Suspends all Firefox Threads. Results in Zero CPU load.

Useful when having 100+ Tabs open and you temporarily need the power elsewhere.

Be careful - might produce RACE CONDITIONS or LOCKUPS in other processes or FF itself.

matching is case sensitive.

It prints myvideo.srt subtitle files in myvideo.avi, saving it in myvideo_subtitled.avi

This will record the capture channel of your soundcard, directly encoded in Ogg Vorbis, in stereo at quality 5 (I'm using this to record live jam sessions from my line input). You can choose which device to capture (eg. line input, microphone or PCM output) with

You can do the same thing and live encode in MP3 or FLAC if you wish, just check FLAC and LAME man pages.

Based on linkinpark342 suggestion.

Sometimes you have to browse your way through a lot of sub-directories. This command cd to the previous sub-directory in alphabetical order. For example, if you have the directories "lectures/01-intro", "lectures/02-basic", "lectures/03-advanced" and so on, and your PWD is "02-basic", it jumps to "01-intro".

Another version based on linkinpark342's contribution.

Sometimes you have to browse your way through a lot of sub-directories. This command cd to the next sub-directory in alphabetical order. For example, if you have the directories "lectures/01-intro", "lectures/02-basic", "lectures/03-advanced" and so on, and your PWD is "02-basic", it jumps to "03-advanced".

This is meant for the bash shell. Put this function in your .profile and you'll be able to use tab-completion for sshing any host which is in your known_hosts file. This assumes that your known_hosts file is located at ~/.ssh/known_hosts. The "complete" command should go on a separate line as such:

function autoCompleteHostname() {

local hosts=($(awk '{print $1}' ~/.ssh/known_hosts | cut -d, -f1));

local cur=${COMP_WORDS[COMP_CWORD]};

COMPREPLY=($(compgen -W '${hosts[@]}' -- $cur ))

}

complete -F autoCompleteHostname ssh

This is useful for displaying a portion of a FILE that contains an error at line NUMBER

create a copy of a video file without the audio tracs

Change ~/tmp to the destination directory, such as your mounted media. Change -n20 to whatever number of files to copy. It should quit when media is full. I use this to put my most recently downloaded podcasts onto my phone.

Get the complete distro information from shell prompt like distributor ID,code name etc.

Sometimes you have to browse your way through a lot of sub-directories. This command cd to the next sub-directory in alphabetical order. For example, if you have the directories "lectures/01-intro", "lectures/02-basic", "lectures/03-advanced" and so on, and your PWD is "02-basic", it jumps to "03-advanced".

replace "/usr/src/linux/kernel/signal.c" with any file you want and listen to its output ! :P

you can also replace "cat" with "echo" or anything you can come up with

have fun :-}

find largest file in /var

This command creates an unmirrored pool using

files. While not recommended, a pool based on files can be

useful for experimental purposes.

command creates a pool with two mirrors, where each mirror contains two disks.

The following command creates a pool with a single raidz root vdev that consists of six disks.