How to check disk space in linux

How to check disk space in Linux: 1. Use the df command to check the file system and obtain information such as how much space is occupied by the hard disk and how much space is currently left. 2. Use the du command to display disk space usage.

#The operating environment of this tutorial: Red Hat Enterprise Linux 6.1 system, Dell G3 computer.

1. Use the df command

df to view the file system in units of disk partitions. You can obtain information such as how much space is occupied by the hard disk and how much space is currently left. .

For example, we use the df -h command to view disk information. The -h option is to display appropriately according to the size:

Display Content parameter description:

• Filesystem: File system

• Size: Partition size

• Used: Used capacity

• ##Avail: The capacity that can still be used

• Use%: The percentage used

• Mounted on: Mount point

#2. Use the du command

du’s original English meaning is disk usage, which means to display the disk Space usage, used to view the total size of the current directory.

For example, check the size of the current directory:

# du -sh
605M    .

Display the space occupied by the specified file:

# du log2012.log 
300     log2012.log

Display the space occupied by the test directory in an easy-to-read format:

# 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

The

du command is used to view the total size of the current directory:

• -s: Only the total number of data blocks occupied is given for each Names parameter.

• -a: Recursively display the number of data blocks occupied by each file in the specified directory and each file in the subdirectory. If neither -s nor -a is specified, only the number of disk blocks occupied by each directory in Names and its subdirectories is displayed.

• -b: List the disk space usage in bytes (the system defaults to k bytes).

• -k: Lists disk space usage in units of 1024 bytes.

• -c: Add a total at the end (system default setting).

• -l: Calculate the size of all files. For hard link files, calculate multiple times.

• -x: Skip directories on different file systems and do not count them.

• -h: Use K, M, G as units to improve the readability of information.

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