View source for Mtime

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

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

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 disk
 # ls -lT disk                     
 -rw-r--r--  1 root  wheel  33554432 Jan  1 01:00:01 1970 disk