Query the disk space usage of CentOS system

Command introduction

1. Use the df -h command to view the total capacity and used capacity of each file system. Your output shows that /dev/mapper/centos-root takes up 47% of the space, which is 36G.

2. Use the du -h -x –max-depth=1 / command to view the size of each subdirectory under the root directory. You can find out the directories that take up a lot of space based on the output, such as /var, /home, /usr, etc.

3. You can check the size of each subdirectory under the /var directory by running the command du -h -x --max-depth=1 /var. Continue this process until you find a file or directory that takes up more space.

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