touch修改文件的修改时间和访问时间,ls --full-time显示文件详细，stat命令

1. 同时修改文件的修改时间和访问时间

touch -d "2010-05-31 08:10:30" test.doc

2. 只修改文件的修改时间

touch -m -d "2010-05-31 08:10:30" test.doc

3. 只修改文件的访问时间

touch -a -d "2010-05-31 08:10:30" test.doc

4.touch -d 和 date -s 的用法相同。如果没有指定日期，默认为系统日期

touch -d 18:03 file

touch -d "18:03" file

touch -d "6:03pm" file
如果没有指定时间，默认为 00:00:00

touch -d 20000506 file

touch -d "05/06/2000" file

touch -d "20000506" filetouch -d "6:03pm 05/06/2000" file

touch -d "20000506 18:03" file

touch -d "20000506 18:03:00" file

Linux 下查看文件时，ls –l 缺省是不显示秒的：

$ ls -l

total 0

-rw-r--r-- 1 gps gps 0 2012-06-12 16:21 README.txt

-rw-r--r-- 1 gps gps 0 2012-06-12 16:21 test.txt

–full-time 参数：

$ ls --full-time

total 0

-rw-r--r-- 1 gps gps 0 2012-06-12 16:21:15.550557727 +0800 README.txt

-rw-r--r-- 1 gps gps 0 2012-06-12 16:21:23.720354220 +0800 test.txt

stat 命令：

$ stat test.txt

File: `test.txt'

Size: 0 Blocks: 0 IO Block: 4096 regular empty file

Device: 801h/2049d Inode: 4980751 Links: 1

Access: (0644/-rw-r--r--) Uid: ( 1000/ gps) Gid: ( 1000/ gps)

Access: 2012-06-12 16:21:23.720354220 +0800

Modify: 2012-06-12 16:21:23.720354220 +0800

Change: 2012-06-12 16:21:23.720354220 +0800

$ touch --help
Usage: touch [OPTION]... FILE...
Update the access and modification times of each FILE to the current time.

A FILE argument that does not exist is created empty, unless -c or -h
is supplied.

A FILE argument string of - is handled specially and causes touch to
change the times of the file associated with standard output.

Mandatory arguments to long options are mandatory for short options too.
-a change only the access time
-c, --no-create do not create any files
-d, --date=STRING parse STRING and use it instead of current time
-f (ignored)
-h, --no-dereference affect each symbolic link instead of any referenced
file (useful only on systems that can change the
timestamps of a symlink)
-m change only the modification time
-r, --reference=FILE use this file's times instead of current time
-t STAMP use [[CC]YY]MMDDhhmm[.ss] instead of current time
--time=WORD change the specified time:
WORD is access, atime, or use: equivalent to -a
WORD is modify or mtime: equivalent to -m
--help display this help and exit
--version output version information and exit

Note that the -d and -t options accept different time-date formats.

Report touch bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
For complete documentation, run: info coreutils 'touch invocation'