====== File timestamp ======

===== atime =====
This timestamp indicates when a file was last accessed (read). ''cat''ing a file or executing a shellscript will set it, for example.



===== ctime =====
This timestamp is set, whenever the metadata of a file (stored in the responsible inode) is set. The metadata includes for example:
  * file name
  * fize size
  * file mode (permissions)
and some other things. ''ctime'' will also be updated when a file is written to (when ''mtime'' is updated.

===== mtime =====
The mtime is set, whenever a file's contents are changed, for example by editing a file.