Commands by grokskookum (19)

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grep -v with multiple patterns.
If you wanted to do all in one command, you could go w/ sed instead

Create a 5 MB blank file via a seek hole
Similar to the original, but is much faster since it only needs to write the last byte as zero. A diff on testfile and testfile.seek will return that they are the same.

Get OSX Battery percentage
adjusting the field "f1" will give you additional information such as f1 = 98% f2 = discharging f3 = 2:02 remaining

Join flv files

archlinux: shows list of packages that are no longer needed
Shows a list of packages which are no longer needed as dependencies of any package installed on your system.

Enter your ssh password one last time
Enter your ssh public key in the remote end for future key-based authentication. Just type your password one last time. The next time you should be able to login with the public key. If you don't have a key, generate one with ssh-keygen. Requires Bourne-compatible shell in the remote end.

Get gzip compressed web page using wget.
Get gzip compressed web page using wget. Caution: The command will fail in case website doesn't return gzip encoded content, though most of thw websites have gzip support now a days.

Find usb device
I often use it to find recently added ou removed device, or using find in /dev, or anything similar. Just run the command, plug the device, and wait to see him and only him

Resume a partially copied file

List processes playing sound
When trying to play a sound you may sometimes get an error saying that your sound card is already used, but not by what process. This will list all processes playing sound, useful to kill processes that you no longer need but that keep using your sound card.


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