Linux Script Basics

1. Text editing

Command mode shortcut key command

Command	Role
Dd	Delete (cut) the entire line where the cursor is located.
5dd	Delete (cut) 5 lines starting at the cursor.
Yy	Copy the entire line where the cursor is located.
5yy	Copies the 5 lines starting at the cursor.
N	Displays the next string that the search command navigates to.
N	Displays the previous string to which the search command is anchored.
U	Undo action from the previous step
P	Pastes the previously deleted (DD) or copied (yy) data after the cursor.
? string	Searches the text for the string from bottom to top.
/String	Searches for the string from top to bottom in the text.

Last-line mode shortcut key command

Command	Role
: W	Save
: Q	Exit
: q!	Force quit (Discard modifications to the text)
: wq!	Force Save exit
: Set Nu	Show line Numbers
: Set Nonu	Do not display line numbers
: command	Execute the command
: integer	Jump to this line
: S/one/two	Replaces the first one in the row where the current cursor is located with two
: s/one/two/g	Replaces all one of the lines in which the current cursor is located
:%s/one/two/g	Replace all of the one in the full text with the

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Linux Script Basics