Commands using e2fsck (2)

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a shell function to print a ruler the width of the terminal window.

How to run X without any graphics hardware
This starts an X server using Xvfb(1) (no graphics hardware required), then starts a VNC server on the display. Change :1 if there's a conflict with an existing display, and change 800x600x24 to suit your tastes (24 is the bit depth, 800x600 is the size). This command obviously requires X be installed, and also x11vnc(1); both are available via your favourite package manager. You can also use another VNC server of your choosing, as long as DISPLAY is set to the display of Xvfb(1). To change your desktop environment (the default is twm(1), which is rather fail), you can add it to your ~/.xinitrc file (see the startx(1) manpage for details).

Clean the /boot directory
On Fedora clean the boot directory; erase older kernel

format txt as table

Get a random quote from Breaking Bad
Hit an API with curl returning a random quote, then parse the result with jq.

Recursively remove 0kb files from a directory

Install Linux Kernel Headers on Debian-based systems
Install the Linux kernel headers for currently running kernel version on Debian-based systems via apt-get

list block devices
Shows all block devices in a tree with descruptions of what they are.

Watch active calls on an Asterisk PBX
Only the number of calls nothing else.

Optimal way of deleting huge numbers of files
Using xargs is better than: $ find /path/to/dir -type f -exec rm \-f {} \; as the -exec switch uses a separate process for each remove. xargs splits the streamed files into more managable subsets so less processes are required.

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