Vim is a text editor that you can use in Linux environments to create or edit files.
There are two working modes in vim. One is the command mode and another is the insert mode.
To enter text or edit any line, press the “i” key on your keyboard (the i stands for Insert).
Once you’re done editing, you can exist this mode by pressing the Esc key.
Some usefull commands:
:? – Search
dd – Delete line
p – paste below cursor
u – Undo last change
:wq Write file to disk and quit the editor
:q! Quit (no warning)
:q Quit (a warning is printed if a modified file has not been saved)
For more commands see: http://www.fprintf.net/vimCheatSheet.html