Linux_10 Useful du (Disk Usage) Commands to Find Disk Usage of Files and Dir -优快云博客

本文链接：https://blog.youkuaiyun.com/iteye_3260/article/details/82138664

via: http://www.tecmint.com/check-linux-disk-usage-of-files-and-directories/

The Linux “du” (Disk Usage) is a standard Unix/Linux command, used to check the information of disk usage of files and directories on a machine. The du command has many parameter options that can be used to get the results in many formats. The du command also displays the files and directory sizes in a recursively manner.

1. To find out the disk usage summary of a /home/tecmint directory tree and each of its sub directories. Enter the command as:

[root@tecmint]# du /home/tecmint

40 /home/tecmint/downloads

4 /home/tecmint/.mozilla/plugins

4 /home/tecmint/.mozilla/extensions

12 /home/tecmint/.mozilla

12 /home/tecmint/.ssh

689112 /home/tecmint/Ubuntu-12.10

689360 /home/tecmint

The output of the above command displays the number of disk blocks in the /home/tecmintdirectory along with its sub-directories.

2. Using “-h” option with “du” command provides results in “Human Readable Format“. Means you can see sizes in Bytes, Kilobytes, Megabytes, Gigabytes etc.

[root@tecmint]# du -h /home/tecmint

40K /home/tecmint/downloads

4.0K /home/tecmint/.mozilla/plugins

4.0K /home/tecmint/.mozilla/extensions

12K /home/tecmint/.mozilla

12K /home/tecmint/.ssh

673M /home/tecmint/Ubuntu-12.10

674M /home/tecmint

3. To get the summary of a grand total disk usage size of an directory use the option “-s” as follows.

[root@tecmint]# du -sh /home/tecmint

674M /home/tecmint

4. Using “-a” flag with “du” command displays the disk usage of all the files and directories.

[root@tecmint]# du -a /home/tecmint

4 /home/tecmint/.bash_logout

12 /home/tecmint/downloads/uploadprogress-1.0.3.1.tgz

24 /home/tecmint/downloads/Phpfiles-org.tar.bz2

40 /home/tecmint/downloads

12 /home/tecmint/uploadprogress-1.0.3.1.tgz

4 /home/tecmint/.mozilla/plugins

4 /home/tecmint/.mozilla/extensions

12 /home/tecmint/.mozilla

4 /home/tecmint/.bashrc

689108 /home/tecmint/Ubuntu-12.10/ubuntu-12.10-server-i386.iso

689112 /home/tecmint/Ubuntu-12.10

689360 /home/tecmint

5. Using “-a” flag along with “-h” displays disk usage of all files and folders in human readeable format. The below output is more easy to understand as it shows the files inKilobytes, Megabytes etc.

[root@tecmint]# du -ah /home/tecmint

4.0K /home/tecmint/.bash_logout

12K /home/tecmint/downloads/uploadprogress-1.0.3.1.tgz

24K /home/tecmint/downloads/Phpfiles-org.tar.bz2

40K /home/tecmint/downloads

12K /home/tecmint/uploadprogress-1.0.3.1.tgz

4.0K /home/tecmint/.mozilla/plugins

4.0K /home/tecmint/.mozilla/extensions

12K /home/tecmint/.mozilla

4.0K /home/tecmint/.bashrc

673M /home/tecmint/Ubuntu-12.10/ubuntu-12.10-server-i386.iso

673M /home/tecmint/Ubuntu-12.10

674M /home/tecmint

6. Find out the disk usage of a directory tree with its subtress in Kilobyte blcoks. Use the “-k” (displays size in 1024 bytes units).

[root@tecmint]# du -k /home/tecmint

40 /home/tecmint/downloads

4 /home/tecmint/.mozilla/plugins

4 /home/tecmint/.mozilla/extensions

12 /home/tecmint/.mozilla

12 /home/tecmint/.ssh

689112 /home/tecmint/Ubuntu-12.10

689360 /home/tecmint

7. To get the summary of disk usage of directory tree along with its subtrees in Megabytes(MB) only. Use the option “-mh” as follows. The “-m” flag counts the blocks in MB units and “-h” stands for human readable format.

[root@tecmint]# du -mh /home/tecmint

40K /home/tecmint/downloads

4.0K /home/tecmint/.mozilla/plugins

4.0K /home/tecmint/.mozilla/extensions

12K /home/tecmint/.mozilla

12K /home/tecmint/.ssh

673M /home/tecmint/Ubuntu-12.10

674M /home/tecmint

8. The “-c” flag provides a grand total usage disk space at the last line. If your directory taken674MB space, then the last last two line of the output would be.

[root@tecmint]# du -ch /home/tecmint

40K /home/tecmint/downloads

4.0K /home/tecmint/.mozilla/plugins

4.0K /home/tecmint/.mozilla/extensions

12K /home/tecmint/.mozilla

12K /home/tecmint/.ssh

673M /home/tecmint/Ubuntu-12.10

674M /home/tecmint

674M total

9. The below command calculates and displays the disk usage of all files and directories, but excludes the files that matches given pattern. The below command excludes the “.txt” files while calculating the total size of diretory. So, this way you can exclude any file formats by using flag “-–exclude“. See the output there is no txt files entry.

[root@tecmint]# du -ah --exclude="*.txt" /home/tecmint

4.0K /home/tecmint/.bash_logout

12K /home/tecmint/downloads/uploadprogress-1.0.3.1.tgz

24K /home/tecmint/downloads/Phpfiles-org.tar.bz2

40K /home/tecmint/downloads

12K /home/tecmint/uploadprogress-1.0.3.1.tgz

4.0K /home/tecmint/.bash_history

4.0K /home/tecmint/.bash_profile

4.0K /home/tecmint/.mozilla/plugins

4.0K /home/tecmint/.mozilla/extensions

12K /home/tecmint/.mozilla

4.0K /home/tecmint/.bashrc