Unix commands for DBAs - Part 2

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#                       VI edior shortcuts
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Opening files:
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vi filename             To open a file 'filename' with vi editor
vi + filename           To open a file 'filename' with vi editor - In last line to append

Saving files:
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ESC :wq          To save and exit the current open file
ESC :wq!         To save and exit the current open file - forcefully (for read only files)

Modes:
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a                       To append after cursor
A                       To append at the end of line
i                       To insert before cursor
I                       To insert in beginning of line
o                       To add new line below cursor
O                       To add new line above cursor

Misc options:
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ESC :se nu       To display line numbers in current open file
ESC :se nonu     To turn off displaying line numbers in current open file