One Linux command per day-CD

The CD command in Linux, used to switch directories, is one of the most commonly used commands in Linux.

1. Command function

   Switch the current directory to the specified directory

2. Command format

   CD [Diretory]
   

3. Common examples

   Example one: Go to/directory

   Command:

CD/

Output:

[[Email protected] ~]# CD/[[email protected]/]# Pwd/[[email protected]/]#

Use the PWD command to view the absolute path to the current directory.

Example two: Returns the current directory of the previous level of the directory, using: /.. The usage can be returned to the upper-level directory,. /.. /.., and so on.

Command:

Cd..

Output:

[Email protected] network-scripts]# Pwd/etc/sysconfig/network-scripts[[email protected] network-scripts]# CD. [Email protected] sysconfig]# Pwd/etc/sysconfig[[email protected] sysconfig]# CD. [[email protected] etc]# pwd/etc[[email protected] ~]# Cd/etc/sysconfig/network-scripts/[[email protected] network-scripts]# Pwd/etc/sysconfig/network-scripts[[email protected] network-scripts]# CD. /.. [Email protected] etc]# Pwd/etc[[email protected] etc]#

Example three: Go to your home directory

Command:

cd# not take any parameters by default returned to the user home directory CD ~# "~" indicates the user's home directory

Output:

[[email protected] network-scripts]# cd[[email protected] ~]# pwd/root[[email protected] ~]# cd/etc/sysconfig/ Network-scripts/[[email protected] network-scripts]# CD ~[[email protected] ~]# Pwd/root[[email protected] ~]#

Example four: Returning a directory before entering this directory

Command:

CD-

Output:

[[Email protected] network-scripts]# CD ~[[email protected] ~]# Pwd/root[[email protected] ~]# CD-/etc/sysconfig/network -scripts[[email protected] network-scripts]# Pwd/etc/sysconfig/network-scripts[[email protected] network-scripts]# CD-/root[[email protected] ~]#

Example five: Use the parameters of the previous command as CD parameters

Command:

CD!$

Output

[[email protected] ~]# Cd/etc/sysconfig/network-scripts/[[email protected] network-scripts]# CD-/root[[email Protected] ~]# CD-/etc/sysconfig/network-scripts[[email protected] network-scripts]# CD! $CD-/root[[email protected] ~ ]# CD! $CD-/etc/sysconfig/network-scripts[[email protected] network-scripts]#

One Linux command per day-CD