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tar the current directory wihtout the absolute path
tars the current directory (and its children) in an archive of the same name (plus ".tar" :)) in the parent directory without the absolute path, so that when the archive is extracted, only the current directory name is created for the path. Assumes bash/zsh.

Copy a file with progress and save hash to a different file

Print number of mb of free ram
This will show the amount of physical RAM that is left unused by the system.

find listening ports by pid
change 24073 to your pid

Get the size of all the directories in current directory (Sorted Human Readable)
This allows the output to be sorted from largest to smallest in human readable format.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

LVM2 Reduce
Just the commands for the lvreduce I keep forgetting.

A DESTRUCTIVE command to render a drive unbootable
Overwrites the boot sector. Since this doesn't overwrite any data, you can usually recover by re-creating the partition table exactly the same as before you zeroed it. This can also help sometimes if you install a new drive in a Windows machine which can't read it.

Fix VirtualBox error

Sort lines on clipboard
Does the same thing in environments where you have "xclip" instead of "pbpaste"/"pbpate" and "pbcopy".


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