What is the command to check the size of a folder in Linux?

The Linux command to check the size of a folder is du. du is a command that counts the disk space occupied by a directory or file. The syntax is "du [option] [directory or file name]"; to view the size of each file or folder in the current directory, execute "du -h –max-depth= 1 *", to query the total size of the current directory, execute "du -sh", to view the total size of the specified directory, execute "du -sh directory name".

#The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

The Linux command to check the size of a folder is du.

du is a command that counts the disk space occupied by a directory or file.

When we count directories, we don’t want to see how much space the subdirectory names and subfile names under the parent directory occupy, but we want to see the total disk usage of the subdirectories and subfiles under the parent directory. At this time, you need to use the du command to count the real disk usage of the directory. The format of the

du command is as follows:

du [选项] [目录或文件名]

Options:

• -a: Display the disk for each subfile Occupancy. By default, only the disk usage of subdirectories is counted

• -h: Use custom units to display disk usage, such as KB, MB or GB;

• -s: Count the total disk usage without listing the disk usage of subdirectories and subfiles

Through the commanddu -h –max-depth=1 *, you can check the size of each file and folder in the current directory, this is more practical.

To query the total size of the current directory, you can use du -sh, where s represents the meaning of statistical summary, that is, only one total size is output.

Use the command du -h –max-depth=0 * to display only direct subdirectory file and folder size statistics.

If you only want to view the total size of the specified directory, you can use du -sh directory name.

You can also specify the display level depth for a specified folder, such as du -h --max-depth=0 software/ and du -h --max-depth=1 software/

##Extended knowledge: the difference between du command and df command

Sometimes we will find that when using the du command and the df command to count partition usage, the data obtained are different. That's because the df command is considered from the perspective of the file system and uses the unallocated space in the file system to determine the amount of space that has been allocated in the file system. That is to say, when using the df command to count partitions, not only the space occupied by files must be considered, but also the space occupied by commands or programs (the most common one is that the files have been deleted, but the program has not released the space).

The du command is file-oriented and will only calculate the disk space occupied by files or directories. In other words, the partitions counted by the df command are more accurate and are real free space.

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