stat命令（获取文件信息）
>ll
drwxr-xr-x 3 root root 72 2010-04-28 16:29 test

>stat test
File: `test'
Size: 72 Blocks: 0 IO Block: 4096 directory
Device: 802h/2050d Inode: 278059 Links: 3
Access: (0755/drwxr-xr-x) Uid: ( 100/ root) Gid: ( 0/ root)
Access: 2012-02-09 16:01:58.000000000 +0800
Modify: 2010-04-28 16:29:37.000000000 +0800
Change: 2010-04-28 16:29:37.000000000 +0800

>stat -c %n test
test

>stat -c %y test
2010-04-28 16:29:37.000000000 +0800

>stat * | grep File | awk '{print $2}'
`diag'

>stat test | grep Modify | awk '{print $2 $3}' | cut -d"." -f1 | sed -e 's/-//g' -e 's/://g'
20100428162937