Vi or Vim Editor

 vi/vim  editor:-

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#vi <filename>  --> to create or edit a file using vi editor

ex: #vi f1

#vim <filname>  

command not found

#yum install vim -y 

#vim <filename>

ex: #vim f2

-> we have 3 modes in vi/vim editor

1) insert mode

2) command mode

3) colon mode

 

insert mode shortcuts:-

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esc + i  ---> to enter into insert mode

esc+shift+i  --> moves the cursor position to present line first character.

esc+shift+a  ---> moves the cursor position to present line last position.

esc+o  --> moves to cursor to below line and creates a new line

esc+shift+o  --> moves the cursor to above line and creates a new line

esc --> to exit from insert mode

command mode shortcuts:-

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esc+shift+h  --> to move the cursor to first line first position 

esc+shift+g  --> to move the cursor to last line first position

esc+ j   --> moves the cursor downwards in same position

esc+k  --> moves the cursor upwards in same position

esc+x  --> to delete a sibgle character

esc+Nx --> to delete a N number of characters[N => natural number]

esc + dw   -->to delete a complete word from present position

esc+ Ndw  --> to delete a N number of words from present position

esc+ dd  ---> to delete a complete line where cursor is present

esc+ Ndd --> to delete N number of lines from present line

esc + u --> to undo the deleted things

esc + yw  --> to copy a complete word from present position

esc + Nyw  --> to copy a complete N number of word from present position

esc+ p   --> to paste the copied content

esc+ yy  --> to copy a complete line 

esc+ Nyy  --> to cesc+ p   --> to paste the copied content

esc+ w  --> to move the cursor to next word first position

esc+b  --> to move the cursor to previous word first position

esc+e  --> to move the cursor to present word last position

esc+shift+ ~  --> to change the letter or character to uppercase or lowercase & viceversa 

colon mode shortcuts:-

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esc+shift+:  --> to enter into colon mode

esc+ shift+: set nu  --> to set index number for lines

esc+shift+: set nonu --> to remove the index numbers from lines

esc+shift+: /<string>   --> to higlight a perticular string or word

esc+ shift+: %s /<replacing word>  /<word to replace>  --> to replace all  the words present in that file

ex: esc+shift+: %s /linux /LINUX

esc+shift+:Nd  --> to delete a peritcular line using index number

esc+shift+:n,Nd  --> to delete the lines starting from n and ending with N

esc+shift+: n co N  --> to copy the line "n"  and paste it in "N" line

esc+shift+: 1,4 co 6  ---> to to copy the lines from 1 to 4  and paste it in 6 line

esc+shift+: w --> to save the changes/content

esc+shift+: q  --> to quit without saving

esc+shift+: q!  --> to quit without saving forcefully

esc+shift+:wq  --> to save and quit 

esc+shift+:wq!  --> to save and quit forcefully