Linux Directory Commands:mkdir, rmdir, tree dirname,basename

Directory management class commands for Linux commands: mkdir, rmdir, tree, DirName, basename

mkdir command: Create directory/new directory

Syntax: mkdir [OPTION]/path/to/somewhere

Common parameter options:

-P: Create parent directory//Recursive creation

-V: Display creation information

Example:

How to create a directory under/tmp/: X_m, X_n, Y_m, Y_n

# mkdir/tmp/{x_,y_}{m,n}

rmdir command: Delete directory

Syntax: Rmdir/path/to/somewhere

Common parameter options:

-P: Delete along with empty directory on upper level (use cautiously)

-p:will also create all directories leading up to the given directory that does not exist already. If the given directory already exists, ignore the error.

-v:display each directory, that mkdir creates. Most often used with-p.

-m:specify the octal permissions of directories created by mkdir.

-P is the most often used when using mkdir to build up complex directory hierarchies, in case a necessary directory is missing or already there. -M is commonly used to lock down temporary directories used by shell scripts.

Examples[edit]

An example of-p on action is:

Mkdir-p/tmp/a/b/c

IF/TMP/A exists but/tmp/a/b does not, mkdir would create/tmp/a/b before creating/tmp/a/b/c.

And an even more powerful command, creating a full tree at once (this however was a Shell extension, nothing mkdir does its ELF):

Mkdir-p Tmpdir/{trunk/sources/{includes,docs},branches,tags}

If one is using the variables with mkdir in a bash script, the POSIX ' special ' built-in command ' eval ' would serve its purpose.

Domain_name=includes,docs

Eval "Mkdir-p Tmpdir/{trunk/sources/{${domain_name}},branches,tags}"

This would create:

Tmpdir

________|______

|      | |

Branches Tags Trunk

|

Sources

____|_____

| |

Includes docs

Tree command: List contents of a table

Syntax: Tree [OPTION] ... [DIR]

-D: File of only hierarchical directory type;

-L Level: shows only a few levels;

dirname command: Removes the file name (part of the non-directory) from the given file name that contains the absolute path, and then returns the remaining

Path (part of the directory)

Syntax: DirName FILENAME

Example:

# Dirname/etc/sysconfig/network-scripts/ifcfg-eth0

/etc/sysconfig/network-scripts

basename command: Removes the left part of the directory from a given file name that contains an absolute path, or simultaneously removes a suffix within

(Part of the directory), and then return to the remainder (part of the non-directory)

Syntax: basename FILENAME [SUFFIX]

Example:

#basename/etc/sysconfig/network-scripts/ifcfg-eth0

Ifcfg-eth0

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Linux Directory Commands:mkdir, rmdir, tree dirname,basename