Linux系統將時間標記分三類：
atime(Access time)：檔案上次被讀取的時間。
ctime(statusChange time)：檔案的屬性或內容上次被修改的時間。
mtime(Modified time)：檔案的內容上次被修改的時間。
下面我將用實驗給大家講解一下：
[root@localhost ~]# touch a.txt==》創建文件a.txt
[root@localhost ~]# stat a.txt==》查看時間戳
File: "a.txt"
Size: 0 Blocks: 0 IO Block: 4096 普通空文件
Device: fd00h/64768dInode: 674903 Links: 1
Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2021-03-10 13:29:04.130157512 +0800
Modify: 2021-03-10 13:29:04.130157512 +0800
Change: 2021-03-10 13:29:04.130157512 +0800
[root@localhost ~]# echo 1>> a.txt==》向文件a.txt追加內容
[root@localhost ~]# stat a.txt==》查看追加內容后的文件時間戳
File: "a.txt"
Size: 1 Blocks: 8 IO Block: 4096 普通文件
Device: fd00h/64768dInode: 674903 Links: 1
Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2021-03-10 13:29:04.130157512 +0800
Modify: 2021-03-10 13:29:19.351159892 +0800==》時間戳改變
Change: 2021-03-10 13:29:19.351159892 +0800==》時間戳改變
[root@localhost ~]# chmod +x a.txt==》修改文件a.txt的權限
[root@localhost ~]# stat a.txt==》查看修改權限后的文件時間戳
File: "a.txt"
Size: 1 Blocks: 8 IO Block: 4096 普通文件
Device: fd00h/64768dInode: 674903 Links: 1
Access: (0755/-rwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2021-03-10 13:29:04.130157512 +0800
Modify: 2021-03-10 13:29:19.351159892 +0800
Change: 2021-03-10 13:29:42.156153774 +0800==》時間戳改變
[root@localhost ~]# cat a.txt==》查看文件a.txt
[root@localhost ~]# stat a.txt==》查看文件a.txt的時間戳
File: "a.txt"
Size: 1 Blocks: 8 IO Block: 4096 普通文件
Device: fd00h/64768dInode: 674903 Links: 1
Access: (0755/-rwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2021-03-10 13:30:00.010155999 +0800==》時間戳改變
Modify: 2021-03-10 13:29:19.351159892 +0800
Change: 2021-03-10 13:29:42.156153774 +0800
[root@localhost ~]# vim a.txt==》向文件a.txt添加內容
daskhdjkas
"a.txt" 1L, 11C 已寫入
[root@localhost ~]# stat a.txt==>查看文件a.txt的時間戳
File: "a.txt"
Size: 11 Blocks: 8 IO Block: 4096 普通文件
Device: fd00h/64768dInode: 674908 Links: 1
Access: (0755/-rwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2021-03-10 13:30:34.652158960 +0800==》時間戳改變
Modify: 2021-03-10 13:30:34.652158960 +0800==》時間戳改變
Change: 2021-03-10 13:30:34.653158940 +0800==》時間戳改變