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Another Curl your IP command
Just another curl command to get your public facing IP

Show database sql schema from Remote or Local database
After ssh into server, run this command to show all the table structure and schema.

convert png into jpg using imagemagick

Delete all files found in directory A from directory B
This command is useful if you accidentally untar or unzip an archive in a directory and you want to automatically remove the files. Just untar the files again in a subdirectory and then run the above command e.g. $ for file in ~/Desktop/temp/*; do rm ~/Desktop/`basename $file`; done

sed : using colons as separators instead of forward slashes
Having to escape forwardslashes when using sed can be a pain. However, it's possible to instead of using / as the separator to use : . I found this by trying to substitute $PWD into my pattern, like so $ sed "s/~.*/$PWD/" file.txt Of course, $PWD will expand to a character string that begins with a / , which will make sed spit out an error such as "sed: -e expression #1, char 8: unknown option to `s'". So simply changing it to $ sed "s:~.*:$PWD:" file.txt did the trick.

Convert a mp3 file to m4a
I use this to convert mp3 files to m4a files that can be used as ringtones on the iPhone. I've documented the process here: http://www.control-d.com/?p=60

Start a HTTP server which serves Python docs
I use this command to start a local Python document server over HTTP port 8888.

list files recursively by size

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

watch the previous command
If you just executed some long command, like "ps -aefww | grep -i [m]yProcess", and if you don't want to retype it or cycle backwards in history and waste time quoting it, then you can use history substitution.


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