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This article gives you a detailed introduction of the df command in Linux disk management and how to use it. The content is very detailed. Interested friends can use it for reference. I hope it will be helpful to you.

1. Command format:

Du [options] [File]

2. Command function:

Displays the disk usage space for each file and directory.

3. Command parameters:

-an or-all displays the size of individual files in the directory.

-b or-bytes displays the directory or file size in byte.

-c or-- total displays not only the size of individual directories or files, but also the sum of all directories or files.

-k or-- kilobytes output in KB (1024bytes).

-m or-- megabytes output in MB.

-s or-- summarize displays only the total and lists only the last plus value.

-h or-- human-readable is in the unit of KMagazine GetWord ("G"); to improve the readability of information.

-x or-- one-file-xystem is based on the file system at the beginning of the processing, and will be skipped in case of other different file system directories.

The source file size of the symbolic link specified in-L or-- dereference display options.

When-S or-- separate-dirs displays the size of an individual directory, it does not include the size of its subdirectories.

-X or-- exclude-from= is in the specified directory or file.

-- exclude= skips the specified directory or file.

-D or-- dereference-args displays the source file size of the specified symbolic link.

The parameters of-H or-- si are the same as-h, but the conversion unit of K _ ~ ~ M ~ G is 1000.

-l or-- count-links repeatedly calculates hardware-linked files.

4. Use an example:

Example 1: displays the space occupied by a directory or file

Command: du

Output:

The code is as follows:

[root@localhost test] # du

608. / test6

308. / test4

4. / scf/lib

4. / scf/service/deploy/product

4. / scf/service/deploy/info

12. / scf/service/deploy

16. / scf/service

4. / scf/doc

4. / scf/bin

32. / scf

8. / test3

1288.

[root@localhost test] #

Description:

Only the directory size of the subdirectories below the current directory and the total size of the current directory are displayed, and the bottom 1288 is the total size of the current directory

Example 2: displays the space occupied by the specified file

Command: du log2012.log

Output:

The code is as follows:

[root@localhost test] # du log2012.log

300 log2012.log

[root@localhost test] #

Example 3: view the space occupied by the specified directory

Command: du scf

Output:

The code is as follows:

[root@localhost test] # du scf

4 scf/lib

4 scf/service/deploy/product

4 scf/service/deploy/info

12 scf/service/deploy

16 scf/service

4 scf/doc

4 scf/bin

32 scf

[root@localhost test] #

Example 4: show the space occupied by multiple files

Command: du log30.tar.gz log31.tar.gz

Output:

The code is as follows:

[root@localhost test] # du log30.tar.gz log31.tar.gz

4 log30.tar.gz

4 log31.tar.gz

[root@localhost test] #

Example 5: only the size of the sum is displayed

Command: du-s

Output:

The code is as follows:

[root@localhost test] # du-s

1288.

[root@localhost test] # du-s scf

32 scf

[root@localhost test] # cd..

[root@localhost soft] # du-s test

1288 test

[root@localhost soft] #

Example 6: easy-to-read format display

Command: du-h test

Output:

The code is as follows:

[root@localhost soft] # du-h test

608K test/test6

308K test/test4

4.0K test/scf/lib

4.0K test/scf/service/deploy/product

4.0K test/scf/service/deploy/info

12K test/scf/service/deploy

16K test/scf/service

4.0K test/scf/doc

4.0K test/scf/bin

32K test/scf

8.0K test/test3

1.3M test

[root@localhost soft] #

Example 7: both files and directories are displayed

Command: du-ah test

Output:

The code is as follows:

[root@localhost soft] # du-ah test

4.0K test/log31.tar.gz

4.0K test/test13.tar.gz

0 test/linklog.log

0 test/test6/log2014.log

300K test/test6/linklog.log

0 test/test6/log2015.log

4.0K test/test6/log2013.log

300K test/test6/log2012.log

0 test/test6/log2017.log

0 test/test6/log2016.log

608K test/test6

0 test/log2015.log

0 test/test4/log2014.log

4.0K test/test4/log2013.log

300K test/test4/log2012.log

308K test/test4

4.0K test/scf/lib

4.0K test/scf/service/deploy/product

4.0K test/scf/service/deploy/info

12K test/scf/service/deploy

16K test/scf/service

4.0K test/scf/doc

4.0K test/scf/bin

32K test/scf

4.0K test/log2013.log

300K test/log2012.log

0 test/log2017.log

0 test/log2016.log

4.0K test/log30.tar.gz

4.0K test/log.tar.bz2

4.0K test/log.tar.gz

0 test/test3/log2014.log

4.0K test/test3/log2013.log

8.0K test/test3

4.0K test/scf.tar.gz

1.3M test

[root@localhost soft] #

Example 8: displays the amount of disk space occupied by several files or directories, and calculates the sum of them

Command: du-c log30.tar.gz log31.tar.gz

Output:

The code is as follows:

[root@localhost test] # du-c log30.tar.gz log31.tar.gz

4 log30.tar.gz

4 log31.tar.gz

8 Total

[root@localhost test] #

With the-c option added, du not only displays the amount of disk space occupied by each of the two directories, but also sums them up on the last line.

Example 9: sort by space size

Command: du | sort-nr | more

Output:

The code is as follows:

[root@localhost test] # du | sort-nr | more

1288.

608. / test6

308. / test4

32. / scf

16. / scf/service

12. / scf/service/deploy

8. / test3

4. / scf/service/deploy/product

4. / scf/service/deploy/info

4. / scf/lib

4. / scf/doc

4. / scf/bin

[root@localhost test] #

Example 10: output the space used by each subdirectory under the current directory

Command: du-h-- max-depth=1

Output:

The code is as follows:

[root@localhost test] # du-h-max-depth=1

608K. / test6

308K. / test4

32K. / scf

8.0K. / test3

1.3M.

[root@localhost test] #

On the Linux disk management df command detailed introduction and how to use to share here, I hope the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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