Mtime: Difference between revisions

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Time of last modification of a file, the information is taken from the [[inode]].
Time of last modification of a file, the information is taken from the [[inode]].


  $ stat -s [[variables|$file_or_diskname]] | tr ' ' '\n' | grep mtime
  $ stat -s [[variables|$file]] | tr ' ' '\n' | grep mtime
  st_mtime=1130490970
  st_mtime=1130490970
  $ date -r 1130490970
  $ date -r 1130490970
  Fri Oct 28 11:16:10 CEST 2005
  Fri Oct 28 11:16:10 CEST 2005
  $ ls -lT disk
  $ ls -lT $file
  -rw-r--r--  1 root  wheel  33554432 Oct 28 11:16:10 2005 disk
  -rw-r--r--  1 root  wheel  33554432 Oct 28 11:16:10 2005 file


If a file has been modified the mtime will change to that date.  The mtime can be changed in a file:
If a file has been modified the mtime will change to that date.  The mtime can be changed in a file:
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  # date -r 0
  # date -r 0
  Thu Jan  1 01:00:00 CET 1970
  Thu Jan  1 01:00:00 CET 1970
  # touch -mt 197001010100.01 disk
  # touch -mt 197001010100.01 $file
  # ls -lT disk                      
  # ls -lT $file                      
  -rw-r--r--  1 root  wheel  33554432 Jan  1 01:00:01 1970 disk
  -rw-r--r--  1 root  wheel  33554432 Jan  1 01:00:01 1970 file


When a files mtime is changed the [[ctime]] will update naturally to the date when this happened.
When a files mtime is changed the [[ctime]] will update naturally to the date when this happened.

Revision as of 13:01, 28 October 2005

Time of last modification of a file, the information is taken from the inode.

$ stat -s $file | tr ' ' '\n' | grep mtime
st_mtime=1130490970
$ date -r 1130490970
Fri Oct 28 11:16:10 CEST 2005
$ ls -lT $file
-rw-r--r--  1 root  wheel  33554432 Oct 28 11:16:10 2005 file

If a file has been modified the mtime will change to that date. The mtime can be changed in a file:

# date -r 0
Thu Jan  1 01:00:00 CET 1970
# touch -mt 197001010100.01 $file
# ls -lT $file                     
-rw-r--r--  1 root  wheel  33554432 Jan  1 01:00:01 1970 file

When a files mtime is changed the ctime will update naturally to the date when this happened.