A daily Linux command () du command

The du command is a view of the space used by files and directory disks.

(1) Usage:

usage: du [options] [file]

(2) Function:

function: report disk space usage

(3) Option parameters:

1)-A--all displays statistics on all files, not just subdirectories.

2)-B--bytes outputs the size in bytes, overriding the default 1024-byte count unit.

3)-H--human-readable with K,m,g as the unit, improve the readability of the information.

4)-S--summarize show only sum for each parameter

5)--max-depth=n only outputs the total of the command line parameters that are less than or equal to the nth level of the directory. The--max-depth=0 function is the same as the-s option.

6)-m--megabytes output in megabytes to the size of the count unit (that is, 1,048,576 bytes)

7)-X file--exclude-from=file is the same as--exclude in addition to the schema obtained from the specified file. Patterns are listed as rows. If the specified file is '-', then read the pattern from the standard input.

8)-K--kilobytes Output in KB (1024bytes)

(4) Example:

The default is 1024 bytes in a unit

1) [[email protected] sunjimeng]# du documents display the space usage of a directory or file

[[email protected] sunjimeng]# du Documents               //Show only Table of contents 0    documents/finddir/dir/cdir    documents/finddir/Dir    documents/ Finddir 8    documents/pdir8    documents/nopdir    

Show space usage for files

[email protected] sunjimeng]# du documents/finddir/dir/head_text4    documents/finddir/dir/ Head_text 

2) [[email protected] sunjimeng]# DU-A documents Detailed view of the current directory, sub-directory, all files and directories

[email protected] sunjimeng]# du-a Documents4documents/finddir/dir/Head_text4documents/finddir/dir/Less20documents/finddir/dir/Cdir4documents/finddir/dir/less1.gz Adocuments/finddir/Dir Adocuments/Finddir0documents/pdir/Find4documents/pdir/T3.txt4documents/pdir/VF0documents/pdir/Utext8documents/Pdir0documents/nopdir/Find4documents/nopdir/T3.txt4documents/nopdir/VF0documents/nopdir/Utext8documents/Nopdir -Documents

3) [[email protected] document]# du by default displays the space usage of the folder for the current directory

[email protected] document]# du0./Newdir A    . [[email protected] document]# ll total dosage A-rw-r--r--.1Root Users -May -  Geneva: -All.txt-rw-rw-r--.1Sunjimeng Users0May +  A: -B.text3-rw-rw-r--.1Sunjimeng Users0May +  A: -C.text6-rw-rw-r--.1Sunjimeng Users0May +  A: -D.TEXTDRWXR-xr-x.2Root UsersWuyiMay -  Geneva: -Newdir-rw-r--r--.1Root Users theMay -  Geneva: -T1.txt-rw-r--r--.1Root Users +May -  Geneva: WuT2.txt[[email protected] document]# CD ./[email protected] sunjimeng]# du Document0document/Newdir ADocument

4) [[email protected] sunjimeng]# Du-ah Documents display in an easy-to-read manner

[email protected] sunjimeng]# du-Ah Documents4.0K documents/finddir/dir/Head_text4.0K documents/finddir/dir/Less20documents/finddir/dir/Cdir4.0K documents/finddir/dir/less1.gz12k Documents/finddir/dir12k Documents/Finddir0documents/pdir/Find4.0K documents/pdir/T3.txt4.0K documents/pdir/VF0documents/pdir/Utext8.0K documents/Pdir0documents/nopdir/Find4.0K documents/nopdir/T3.txt4.0K documents/nopdir/VF0documents/nopdir/Utext8.0K documents/nopdir28k Documents

5) [[email protected] sunjimeng]# Du-hba Documents displayed in a single byte

[email protected] sunjimeng]# du-HBA Documents664documents/finddir/dir/Head_text $documents/finddir/dir/Less26documents/finddir/dir/Cdir thedocuments/finddir/dir/less1.gz854documents/finddir/Dir870documents/Finddir0documents/pdir/Find -documents/pdir/T3.txt thedocuments/pdir/VF0documents/pdir/Utext241documents/Pdir0documents/nopdir/Find -documents/nopdir/T3.txt thedocuments/nopdir/VF0documents/nopdir/Utext241documents/Nopdir1396Documents

6) [[email protected] sunjimeng]# Du-s * Only shows the space usage of subfolders in total

[Email protected] sunjimeng]# Du-s *0Desktop ADocument -Documents0Downloads0Findtextdir0Music0Pictures0 Public0Templates0videos[[email protected] sunjimeng]# du-S//Displays the current folder by default Sunjimeng5328    

7) [[email protected] sunjimeng]# DU-BH * |sort-n sorted according to the size of the directory, including subdirectories of the directory

[Email protected] sunjimeng]# DU-BH * |sort-N1. 4K Documents6Desktop6documents/finddir/dir/Cdir6Downloads6Findtextdir6Music6Pictures6 Public6Templates6VideosWuyidocument/Newdir241documents/Nopdir241documents/Pdir321Document854documents/finddir/Dir870Documents/finddir

8) [[email protected]/]# Du-ahm--max-depth=0 Displays the size of the folder in M, and can specify the depth of the display

[Email protected]/]# Du-ahm--max-depth=0 //depth of 0 indicates only the current folder/size is displayed du: Unable to access"./PROC/4599/TASK/4599/FD/4": There is no file or directory//But the entire disk must be queried in order to know the result du: inaccessible"./PROC/4599/TASK/4599/FDINFO/4": No file or directory du: unreachable"./PROC/4599/FD/4": No file or directory du: unreachable"./PROC/4599/FDINFO/4": No file or directory du: unreachable"./run/user/1000/gvfs": Insufficient Permissions3540    . [[Email protected]/]# Du-ahm--max-depth=1 the./Boot1./DEVDU: Unable to access"./PROC/4670/TASK/4670/FD/4": No file or directory du: unreachable"./PROC/4670/TASK/4670/FDINFO/4": No file or directory du: unreachable"./PROC/4670/FD/4": No file or directory du: unreachable"./PROC/4670/FDINFO/4": No file or directory0./PROCDU: Unable to access"./run/user/1000/gvfs": Insufficient Permissions9./Run0./SYS -./etc1./Root1./tmp -./var3304./usr0./bin0./Sbin0./Lib0./lib646./Home0./Media0./mnt0./opt0./SRV0./touch_test0./Touch_text3540. The entire Ext file system space usage is about 3540M

A daily Linux command () du command