Common shell commands

What is a shell?

The shell has some common command set, which is an instruction for invoking the inner core of the system.

Here's a list of some common shell commands

ls: View all files in the directory

-L : View file Details

-A: View all files, including hidden files

PWD: View the directory where your current work is located

CD: Go to a directory

CD ~ : Returns the user's home directory

Cd.. : Returns to the previous layer

CD Absolute Path

CD relative path

Clear: Clear Screen

Logout: Log Off users

Shutdown: Off

-H : Shutdown

-R: restart

-K: Warning

-C: Cancel

Halt: Shut down the machine

Reboot: Restart

VI Shortcut keys

1) move cursor

H : Move the cursor one character to the left

J : Move the cursor up one character

K : The cursor moves down one character

L : Move the cursor right one character

0 : Cursor moves to the beginning of the line

$ : Cursor moves to end of line

H : Move the cursor to the top line of the screen

M : Move the cursor to the middle of the screen

L : The cursor moves to the bottom line of the screen

2) Insert text

I : Insert content in front of cursor

A : Insert content after cursor

o : Insert a new row on the next line of the row

O : Insert a new row on the previous line of the row

3) Delete text

X: Delete the character following the cursor

X: Delete the characters in front of the cursor

NX: Delete n characters after cursor

NX: Delete n characters before the cursor

D0: Delete the cursor to the beginning of the text

d$: Delete the cursor to the end of the line

DD : Delete entire row

NDD : Delete n rows down

4) Copy text

YY : Copy entire row

Nyy : Copy n rows

P : Paste the next line in the same row

P : Paste a line on the same row

DD : Cut

5) Find text

/pattern : Looking down

? pattern : Find up

N : Sequential lookup

N : Reverse Lookup

: s/p1/p2/g : In the current line, replace p1 with p2

: n1,n2s/p1/p2/g : replace p1 between N1 and n2 rows with p2

6) screen tumbling

Ctrl+u: First half screen to file

Ctrl+d: Half-screen to the end of the file

Ctrl+f: Flip a screen to the end of a file

Ctrl+b: Turn one screen at the top of the file

7) last line command

: N1,N2 CO n3 : Copy the N1 to n2 line below the N3 line

: n1,n2 m n3 : cut N1 to n2 line below N3 row

: N1,n2 d : delete N1 to n2 Row

: w Save

: Q Exit

: x Save and exit

: q! Force Exit

: w! Force Save

: numbers are positioned to the specified line

: Set nu Displays line number

: Set Nonu cancel line number

U: Cancel last action

Common shell commands