| linux下如何察看某个文件或目录的atime,ctime,mtime linux提供了很方便的一个命令，stat file:
[root@rac01 app]# pwd
/u01/app
[root@rac01 app]#
root@rac01 app]# stat oracle
File: ‘oracle’
Size: 84 Blocks: 0 IO Block: 4096 directory
Device: 811h/2065d Inode: 20628886 Links: 7
Access: (0775/drwxrwxr-x) Uid: ( 1001/ oracle) Gid: ( 1002/oinstall)
Access: 2018-01-07 18:22:42.813730118 +0800
Modify: 2018-01-07 18:24:27.418707810 +0800
Change: 2018-01-07 18:24:27.418707810 +0800
Birth: -
要修改 m时间，可以使用 touch来完成：
touch -m -d '2018-01-07 10:00:00' oracle
[root@rac01 app]# stat oracle
File: ‘oracle’
Size: 84 Blocks: 0 IO Block: 4096 directory
Device: 811h/2065d Inode: 20628886 Links: 7
Access: (0775/drwxrwxr-x) Uid: ( 1001/ oracle) Gid: ( 1002/oinstall)
Access: 2018-01-07 18:22:42.813730118 +0800
Modify: 2018-01-07 10:00:00.000000000 +0800
Change: 2018-01-07 18:26:21.145882983 +0800
Birth: -
平时，我们通过ls 看到的就是m时间：
[root@rac01 app]# ls --full-time
total 0
drwxr-xr-x 5 root oinstall 53 2018-01-07 09:18:47.417968129 +0800 grid
drwxrwxr-x 7 oracle oinstall 84 2018-01-07 10:00:00.000000000 +0800 oracle |