Sunday, 28 August 2016

Unix bash cheat sheet

Getting the current directory:

$ pwd

To find some executable:

$ where perl

$ which perl

Viewing the whole content of the file:

$ cat /bin/man2html

Viewing only the first line of the file:

$ head -n 1 file.txt

Viewing only the last line of the file:

$ tail -n 1 file.txt

Editing file:

$ vi /bin/man2html

Initially, vi opens in command mode.

i - to enter edit (insert) mode
ESC - to exit edit mode
:wq - write and quit
:q! - quit without saving changes

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