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'