Set file permission mode

• relative permissions: ugo+rwx
• absolute permission: 777
• 4 - Read
• 2- Write
• 1 - Execute

(-R recursive)

Set ownership user and/or group attributes of a file or directory

chown user:group file

(-R recursively affect a directory)

view attributes of files or directories

Attributes are invisible fields which determine how the file will be treated during writing and reading.

Some of the attributes are whether the file must be deleted securely when it is deleted, whether it should be compressed at the file system level, should not be backed up (no dump), etc.,

change file attributes

Some of the attributes are whether the file must be deleted securely when it is deleted, whether it should be compressed at the file system level, should not be backed up (no dump), etc.,

File System Check

Check a real file system for inconsistencies

recursively traverse a directory structure

• can shortlist files / directories by various criteria
• can execute a program with the matched filename as argument ( find . -exec cat '{}' ';' )

create a device special file

can create a block device file or a character device file

create a named pipe

disk free.

lists how much each mounted file systems are free

data is obtained from the file system (not computed from individual files in the file system)

disk space usage

finds out the size used by given files or directories