In vi editor we have below two modes.
1. Insert mode
2. Command mode
Insert Mode:
In this mode we can insert the required content for the file.
Command Mode:
In this mode we can do maximum operations like searching a word, copy, delete, paste, undo changes, etc…
Creating file using vi editor:
[root@server ~]# vi testfile
Once executed above command press i in keyboard to move insert mode. You will find -INSERT- line bottom of the file once you moved to insert mode.
~ ~ ~ ~ ~ ~ ~ -- INSERT --
Type the content for this file. Once provided the content press esc key in keyboard to go back to command mode and use :wq to save and exit from the file
[root@server ~]# vi testfile This is my test file ~ ~ ~ :wq
Find the below more options in vi editor which will be executed in command mode.
:q Simple q will help us to exit from the file without saving file.
:u undo operation
/ to search any word inside of this file
example: /test
yy to copy a line
<n>yy to copy n number of lines eg: 5yy
dd to delete a line
<n>dd to delete n number of lines eg: 10dd
p to paste the copied lines. it will paste the copied lines next line of the cursor placed.
:set nu to set line numbers inside the files.