Shulou(Shulou.com)06/02 Report--

1. The metadata of a file refers to the attribute, size, creation time, access time, belonging to the master group and other information of the file.

two。 Three timestamps:

Access time: access time, abbreviated atime, read and write file content

Modify time: modification time, mtime, change file content (data)

Change time: change time, ctime, metadata change

3. Timestamp of the modified file: touch

Touch-change file timestamps

Touch [OPTION]... FILE...

-an or-- time=atime or-- time=access or-- time=use only changes the access time.

-c or-- no-create does not create any documentation.

-d uses the specified date time instead of the current time.

-f this parameter is ignored and not processed, and is only responsible for resolving the compatibility issue of the BSD version of the touch directive.

-m or-- time=mtime or-- time=modify only changes the time of change.

-r set the date and time of the specified document or directory to the same date and time as the reference document or directory.

-t uses the specified date time instead of the current time.

[[CC] YY] MMDDhhmm [.ss]

(1) modify the ATime of the file using the touch instruction

Touch-a file touch-a "20180808 08:08:37" filename

(2) modify the MTime of the file using the touch instruction

Touch-m file

Touch-m "20180808 08:08:37" filename

(3) modify the CTime of the file by using touch instruction

Touch-c file touch-c "20180808 08:08:37" filename

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