Three time states of Atime, Mtime, CTime in Linux

Source: Internet
Author: User

Atime:access time Last visited

Mtime:modify time Last modified (refers to modified file contents, data content)

Ctime:change time Last property change, inode node information modified (size, group, owner, permissions)

Touch, chmod, Chown will change this value


1. When mtime changes, CTime must change because the file size and other attributes change

When 2.mtime changes, atime does not necessarily change. #echo "This is a test" >>/etc/issue does not need to be accessed first.

When 3.atime changes, mtime and CTime do not change.


Stat lists the values for three times at a time

Ls-l file to view files modified time, Mtime

LS-LC File View files status change time, CTime

Ls-lu file access time, Atime


Three times when touch changes a file

Touch file will be modified three times

Touch-a-T 201507161611 file only modifies Atime access time for files, Mtime and CTime do not

Touch-m-T 201507161612 file only modifies mtime change time of files

Touch-c-T 201507161613 file only modifies CTime time


Three time states of Atime, Mtime, CTime in Linux

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