Basic Linux commands

 

Basic Linux commands    

CD command in Linux with example

command to return to the home directory immediately, use cd ~ OR cd 

command to change into the root directory of Linux file system, use cd / 

command to go into the root user directory, run cd /root/ as root user. 

command to navigate up one directory level up, use cd ..  

command to move preview directory cd ../

command to go back to the previous directory, use cd - 

 

SU command in Linux with example

SU Means - Switch User 

 

PWD command in Linux with example

pwd - present working directory

LS command in Linux with example

$ ls- list file or directory  

 $ ls - l (list file or directory - long list)

 

$ ls - a (list file or directory - Hidden list)

 

$ ls -1 (Display One File Per Line)

 $ ls -lh  (Display File Size in Human Readable Format)

$ ls -lt (Order Files Based on Last Modified Time)

$ ls -ltr (Order Files Based on Last Modified Time in Reverse Order)

 

 

Touch command in Linux with example

touch file.txt (Create a file)

touch file1.txt file2.txt (Create Multiple Files)

Touch-a - change the access time only

Touch-c - if the file does not exist, do not create it

Touch-d - update the access and modification times

Touch-m - change the modification time only

Touch-r - use the access and modification times of file

Touch-t - creates a file using a specified time  

vi / vim text editor command in Linux with example

You can use VI edit to edit file

$vi file1.text 

 

VI Editing commands

i – Insert at cursor (goes into insert mode) 

Esc - Terminate exit insert mode

:wq! - Save file (Exc and :wq! + Enter)  

cat or more command in Linux with example

cat or more command use to view the contents of a file.

$ cat file.txt file1.txt (Display two files)

$ less file.txt 

$ head file.txt

$ head 15 file.txt (display first 15 lines)

$ tail file.txt  

$ tail n file.txt (display last n lines of a file)

cp command in Linux with example

cp command use to copying files and directories

$ cp file1.txt filebackup_23012022.txt

 

rm command in Linux with example

 rm command is used to remove a file.

 

Basic Linux command about directory 

mkdir command in Linux with example

mkdir command use to create directory (directory) 

$ mkdir --version  (check directory version)

 

$ mkdir dir1 (create a single directory)

 $ mkdir dir1 dir2 dir3 (create a multiple directory)

$ mkdir -p tech/techopss/backup  

(create multiple sub directories - parent directories)

$ mkdir -m777  dir1(set access to dir5 folder to all users)

rm -r command in Linux with example

rm -r command use to remove directory 

rm -r (remove non-empty directories use recursive -r)
rm -d ( remove an empty directory use -d)
rm -rf (command use to remove directory forcible delete (Yes you want to delete this directory will not ask)

cp -r command in Linux with example

$ cp-r  (use to copy directory to another directory)

$ cp - pr (command use to copy same time stamp from source to destination folder)

mv command in Linux with example

$ mv test1 tech (move directory to another directory)