Understanding the Linux df And du Commands

1. What is the difference between DF and du commands in Linux?
2. Why is DF and Du different?
3. What is DU in Linux command?
4. What is DU command?
5. What does DF do in Linux?
6. What is inode Linux?
7. Why does df show greater disk usage than DU in Red Hat Enterprise Linux?
8. What is the command to display the disk space usage the current directory?
9. What is the command to display the disk usage of the given directory?
10. What are the commands in Linux?
11. How do I copy directories in Linux?
12. How do I see disk usage in Linux?

What is the difference between DF and du commands in Linux?

DF(disk free) looks at disk used blocks directly in filesystem metadata. ... DU(disk usage) is used more than df in day to day project as it shows the disk usage as per directory level. Basically, df reads the superblock only and trusts it completely.

Why is DF and Du different?

Answer. du is used to estimate file space usage—space used under a particular directory or files on a file system. df is used to display the amount of available disk space for file systems on which the invoking user has appropriate read access.

What is DU in Linux command?

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.

What is DU command?

du command, short for disk usage, is used to estimate file space usage. The du command can be used to track the files and directories which are consuming excessive amount of space on hard disk drive. –apparent-size : print apparent sizes, rather than disk usage.

What does DF do in Linux?

The 'df' command stands for “disk filesystem“, it is used to get a full summary of available and used disk space usage of the file system on Linux system.

What is inode Linux?

The inode (index node) is a data structure in a Unix-style file system that describes a file-system object such as a file or a directory. Each inode stores the attributes and disk block locations of the object's data. ... A directory contains an entry for itself, its parent, and each of its children.

Why does df show greater disk usage than DU in Red Hat Enterprise Linux?

It because file descriptor in /proc/ filesystem is held open. So if there are such open descriptors to files already removed, space occupied by them considered as used by df (and df is right), but they can not be taken into account by du due to there are no longer filenames associated with them.

What is the command to display the disk space usage the current directory?

unlike df which prints information about the disk usage of the mounted file systems , the du command gives you estimate of disk space used by given files or directories. You can view all available du command options by typing man du in your terminal. If you have any questions or feedback, please leave a comment below.

What is the command to display the disk usage of the given directory?

The du command stands for disk usage. This command is included by default in most Linux distributions. The system should display a list of the contents of your home directory, with a number to the left.

What are the commands in Linux?

which command in Linux is a command which is used to locate the executable file associated with the given command by searching it in the path environment variable. It has 3 return status as follows: 0 : If all specified commands are found and executable.

How do I copy directories in Linux?

In order to copy a directory on Linux, you have to execute the “cp” command with the “-R” option for recursive and specify the source and destination directories to be copied. As an example, let's say that you want to copy the “/etc” directory into a backup folder named “/etc_backup”.

How do I see disk usage in Linux?

1. How much space do I have free on my Linux drive? ...
2. You can check your disk space simply by opening a terminal window and entering the following: df. ...
3. You can display disk usage in a more human-readable format by adding the –h option: df –h. ...
4. The df command can be used to display a specific file system: df –h /dev/sda2.