This article link: http://www.cnblogs.com/MartinChentf/p/6076075.html (reproduced please specify the source)
In a Linux system, the mkdir command is used to create a directory or a cascading directory.
1. Command format
mkdir [Options] Directory name
2. Command options
-m=Mode
Specify access permissions for the directory, similar to chmod.
-P If the directory already exists, there is no error message. If the parent directory does not exist, the parent directory will be created. This option is commonly used to create cascading catalogs.
-V Displays the prompt information for each directory.
3. Example
Example 1: Create the Baklog directory in the current directory.
/home/dodv81>umask
0002
/home/dodv81>mkdir baklog/home/dodv81>lldrwxrwxr-x 2 4096: baklog/home/dodv81>mkdir baklog mkdir: Cannot create directory ' Baklog': File exists
The mkdir command does not have any options to create the directory by default in the current directory, and the default permission for the directory is 777-umask. An error will be prompted if the directory already exists.
Example 2: Create multiple directories.
/home/dodv81/baklog>mkdir cep dod testlog/home/dodv81/baklog>lsCEP DoD Testlog
Or, multiple directories are enclosed in curly braces ({}) and separated by commas.
/home/dodv81/baklog>mkdir {cep,dod,testlog}/home/dodv81/baklog>ls CEP DoD testlog
There can be no whitespace before or after the comma, otherwise the following directory will be created:
/home/dodv81/baklog>mkdir {CEP, DOD, testlog}/home/dodv81/baklog>ls{ CEP, DoD, testlog}
Example 3: Create a cascading directory. Subdirectories in the same directory are enclosed in curly braces and separated by commas.
/home/dodv81>mkdir -P baklog/{bin,lib,lig/{Cep,dod,testlog}}/home/dodv81>ls -R baklog/baklog/: Bin lib ligbaklog/bin:baklog/lib:baklog/ lig:cep dod testlogbaklog/lig/cep:baklog/lig/dod:baklog/lig/testlog :
Example 4: Specify permissions for the directory, and the specified permissions are mode-umask. For example, Mode=rx, the final permission is 555-2=554, which is rw-rw-r--.
/home/dodv81/baklog/bin> mkdir -m= R A --read-only
/home/dodv81/baklog/bin> mkdir -m=w B --Write only/home/dodv81/baklog/bin> mkdir -m= RW C --Read and write/home/dodv81/baklog/bin> mkdir -m= Rx D --read executable/home/dodv81/baklog/bin> mkdir -m= rwx E --Read and write executable/home/dodv81/baklog/bin>Lltotal -Dr--r--r--2dodv81 dodv814096Nov - at: -AD-W--W----2dodv81 dodv814096Nov - at: -BDRW-rw-r--2dodv81 dodv814096Nov - at: -CDR-xr-xr-x2dodv81 dodv814096Nov - at: -DDRWXRWXR-X2dodv81 dodv814096Nov - at: theE
Example 5: Viewing process information for creating a directory
/home/dodv81>mkdir -vp baklog/{bin,lib,lig/{cep,dod,testlog}}mkdir: Created directory ' Baklog'mkdir: Created directory ' Baklog/bin'mkdir: Created Directory ' Baklog/lib'mkdir: Created directory ' Baklog/lig'mkdir: Created Directory ' baklog/lig/cep'mkdir: Created directory ' Baklog/lig/dod'mkdir : Created directory ' Baklog/lig/testlog'
Common Linux commands at work: directory
Common Linux commands in work: mkdir command