Text Editors in Unix
Being able to use a text editor is probably one of the most critical skills to have as a system administrator. You constantly need to edit con fig files, write scripts or make changes to system files …….. all of which require you to use a text editor.
- The three most popular editors available today include
Vi(or) Vim: Text editor with great flexibility.
Emacs : similar to vi, an advanced text editor with many features.
Nano : A basic text editor for quick editing
- Vi (or) Vim Editor:
- Using this editor to create new files, open the files and modifying the data into a existing files.
- The Vi Editor is most popular
- It has three modes:
- Command mode
- Insert mode
- Execution (or) colon mode
- By default mode is command mode
Syn: Vim [arguments] [file]
Arguments: – R —–> opens a file in read –only mode
– o —–> Open two files at a time
+ —–> Starts at the end of the file
+ <rum> —–> Start at line <num>
Insert mode options:
i ——–> To begin insert mode at the current cursor position.
I ——–>To Insert at the beginning of the current line
a——–>To append to the next word’s letter.
A ——–> To append at the end of the line
o ——–>To insert a new line below the cursor position.
O ——–> To Insert a new line above the cursor position.
Commands for command mode:
e ——–> Moves to the end of a word
b ——–> Moves to the beginning of a word.
$ ——–>Moves to the end of a line.
˄ ——–>Moves to the beginning of a line
H ——–>Moves to the first line onscreen
M ——–> Moves to the middle line onscreen
L ——–>Moves to the last line onscreen
x (nx) ——–>Deletes current character.
dd (ndd)——–>Deletes the current line
dw (ndw)——–>Deletes current word.
Yy(nyy) ——–> yanks (copies) the current line
p ——–>paste below the cursor line
P ——–>paste above the cursor line
U——–>undo the last action.
gg(ngg)——–>go to beginning of the file
G ——–>End of the file.
W (n)——–>To move the cursor forward, word by word.
b(n) ——–> To move the cursor back word, word by word
Ctrl +f ——–>To forward one page.
Ctrl +b ——–>To back word one page.
/ ——–>To search a word in the file.
n ——–>Find next occurrence of search word.
N ——–> find previous occurrence of search word.
. ——–> Repeat last command action.
Commands for last line mode:
:q ——–>To quit without saving
:w ——–>To save the changes
:wq ——–>To save & quit
:wq! (or) 😡 ——–> To save & quit with forcefully.
:set nu (or) :se nu ——-> To setting line numbers.
:set nonu (or) :se nonu——> To remove line numbers.
:n ——>Jumps to line n
:$d ——>To delete last line
:! <unixcmd> ——> To execute unix cmds
😡 ——>To give password to the file and remove password.
:/storing / ——>search a word in the file.
Desired to gain proficiency on Linux ? Explore the blog post on Linux training online to become a pro in Linux.
- To find & Replace:
: % S/root/dog/ To replace storing “dog” for the first instance
: %s/root/dog/g For each instance of a line.
: %s/root/dog/gi To ignore case sensitive
: %s/root/dog/gc ask for confirmation
- Executing unix commands in vi:
Any unix command can be Executed from the vi command line by typing an “!” before the unix command.
: ! Pwd
: r ! data Reads the results from the date command into a new line following the cursor
: r ! cat file1
- I want to copy 1,4 lines to paste after 10th line:
: 1,4 CO 10
- I want to move 3,7 lines after 8th line:
: 3,7 mo 8
- I want to copy 1,30 lines create a new file:
: 1,30 w test1
- I want to append the data into a existing file:
: 8,20 w >> test1
- I want to insert end of the line (or) we require line
Managing two files at time:
$vim -0 file1 file2
$vim file1 file2
:n —-> edit next file (file2)
:rew —-> Rewind to the file (file1)
- To move one file to another file (ctrl + W)
Press two times
For indepth understanding of Linux click on