文件访问时间简记（Modify time 和 Change time）

[root@77-29-68-bx-core]# stat hql.out
  File: ‘hql.out’
  Size: 13750       Blocks: 32         IO Block: 4096   regular file
Device: 807h/2055d  Inode: 195302554   Links: 1
Access: (0664/-rw-rw-r--)  Uid: ( 1171/d1_pa)   Gid: ( 1172/d1_pa)
Access: 2019-03-25 20:38:36.885282923 +0800
Modify: 2019-03-25 20:38:36.150282730 +0800
Change: 2019-03-25 20:38:36.150282730 +0800
 Birth: -
[root@77-29-68-bx-core suanec-waic-job-from-weiclient-f7aa171b-58-35522803108336384]# chmod +x hql.out
[root@77-29-68-bx-core suanec-waic-job-from-weiclient-f7aa171b-58-35522803108336384]# stat hql.out
  File: ‘hql.out’
  Size: 13750       Blocks: 32         IO Block: 4096   regular file
Device: 807h/2055d  Inode: 195302554   Links: 1
Access: (0775/-rwxrwxr-x)  Uid: ( 1171/d1_pa)   Gid: ( 1172/d1_pa)
Access: 2019-03-25 20:38:36.885282923 +0800
Modify: 2019-03-25 20:38:36.150282730 +0800
Change: 2019-03-26 11:20:30.613946678 +0800
 Birth: -
[root@77-29-68-bx-core suanec-waic-job-from-weiclient-f7aa171b-58-35522803108336384]# du -sh ./hql.out
16K ./hql.out
[root@77-29-68-bx-core suanec-waic-job-from-weiclient-f7aa171b-58-35522803108336384]# stat hql.out
  File: ‘hql.out’
  Size: 13750       Blocks: 32         IO Block: 4096   regular file
Device: 807h/2055d  Inode: 195302554   Links: 1
Access: (0775/-rwxrwxr-x)  Uid: ( 1171/d1_pa)   Gid: ( 1172/d1_pa)
Access: 2019-03-25 20:38:36.885282923 +0800
Modify: 2019-03-25 20:38:36.150282730 +0800
Change: 2019-03-26 11:20:30.613946678 +0800
 Birth: -

• 访问文件：vim/sh/bash/cat/more等操作会重置Access time
• 读取文件属性：ls/stat/wc/du等操作不会重置Access time
• 修改文件：会重置Modify time 和 Change time
• 修改权限但不调整内容： 不会重置Modify time， 但会重置 Change time。