What is du used for in Linux?
The du command is a standard Linux/Unix command that allows a user to gain disk usage information quickly. It is best applied to specific directories and allows many variations for customizing the output to meet your needs. As with most commands, the user can take advantage of many options or flags.
How do I check spaces on a directory in Linux?
Linux check disk space with df command
- Open the terminal and type the following command to check disk space.
- The basic syntax for df is: df [options] [devices] Type:
- df -H.
Why does du take so long?
Counting up file sizes for du is slow because you have to access metadata of a potentially large number of files, scattered around the disk. If you run updatedb aggressively, the metadata for all the files is forced to be stored in RAM.
What is the output of du command in Linux?
In Linux specifically, you can view how much space that these files take up in the command line terminal by using the du command. The du command (the name is shortened from “disk usage”), as the name implies, will simply display, in its output, the amount of disk space being used by a specified file or directory.
How do I check the size of a file in redhat?
Using the ls Command –h – scales file sizes and directory sizes into KB, MB, GB, or TB when the file or directory size is larger than 1024 bytes. –s – displays a list of the files and directories and shows the sizes in blocks.
How do you sort by size in du command?
2. Using the du and sort Commands. We can use du and sort commands to list and sort files according to their size: $ du -ah –max-depth=1 | sort -h 451M ./dir2 751M ./dir1 1.2G ./file4.
Does du cache?
du command does not have a cache mechanism. Knowing that stat() metadata are cached by the OS, this will reduce du or ncdu execution time during multiple and successive runs.
Is ncdu faster than du?
The diskus utility computes the total file size of the current directory. It is a parallelized version of du -sh or rather du -sh –bytes command. The developer of diskus utility claims that it is about nine times faster compared to ‘du -sh’.