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Mnemonic Devices > ICT > Important Keystroke Sequence in Linux

Important Keystroke Sequence in Linux

 elephant legs

Raising Skinny Elephants Is Utterly Boring

"Raising Skinny Elephants Is Utterly Boring" is a mnemonic device for remembering a particularly important keystroke sequence in Linux. In the event of a total system freeze up, this is the failsafe way to safely reboot a near-frozen computer.

The first two key sequences to deal with a frozen machine are:
Alt + Ctrl + to enter a command prompt. Normally the function keys F1 to F6 can be used.
Control-Alt-Delete. This performs a regular shutdown, if possible, which allows running services to shut down normally.
Using 'RSEIUB' follows these two steps as a last resort. The squence is performed as follows: While holding Alt and SysRq, press they keys R, S, E, I, U, and then B, in sequence, leaving some time between keystrokes.

 elephant linux Meaning
R places the keyboard in raw mode
S synchronizes the disk
E terminates all processes
I kills all processes
U remounts all filesystems read-only
B reboots the machine

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