linux上面的一些小知识点

帅大大的架构之路2026-06-10 10:32

1、如何查看一个目录的时间？

我们通常使用stat直接查看

shell 复制代码

-bash-4.2# stat LIANLIAN/
  File: 'LIANLIAN/'
  Size: 114688    	Blocks: 232        IO Block: 4096   directory
Device: fd01h/64769d	Inode: 2097153     Links: 2
Access: (0755/drwxr-xr-x)  Uid: ( 1001/virtusers)   Gid: ( 1001/virtusers)
Access: 2026-06-09 15:51:11.994679481 +0800
Modify: 2026-06-09 15:50:16.739734555 +0800
Change: 2026-06-09 15:50:16.739734555 +0800
 Birth: -

会发现 Birth: -，这样是看不到的

那么可以使用另一种方式，这种方式可以查看ext4文件系统

先查看目录的inode

shell 复制代码

-bash-4.2# ls -id LIANLIAN/
2097153 LIANLIAN/

查看一下盘符，然后进入debugfs

shell 复制代码

-bash-4.2# lsblk 
NAME   MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vda    253:0    0  40G  0 disk 
└─vda1 253:1    0  40G  0 part /
-bash-4.2# debugfs /dev/vda1 
debugfs 1.43.5 (04-Aug-2017)
debugfs:

再使用stat查看对应的inode，inode记得加尖括号

shell 复制代码

debugfs:  stat <2097153>
Inode: 2097153   Type: directory    Mode:  0755   Flags: 0x81000
Generation: 3953532325    Version: 0x00000000:000024c1
User:  1001   Group:  1001   Project:     0   Size: 114688
File ACL: 0    Directory ACL: 0
Links: 2   Blockcount: 232
Fragment:  Address: 0    Number: 0    Size: 0
 ctime: 0x6a27c5b8:b05dd06c -- Tue Jun  9 15:50:16 2026
 atime: 0x6a27c5ef:ed266ae4 -- Tue Jun  9 15:51:11 2026
 mtime: 0x6a27c5b8:b05dd06c -- Tue Jun  9 15:50:16 2026
crtime: 0x6923bd76:d2d9d8a8 -- Mon Nov 24 10:05:42 2025
Size of extra inode fields: 32
EXTENTS:
(ETB0):8396853, (0):8396863, (1):8396903, (2-3):8396908-8396909, (4):8396914, (5):8396850, (6):8396858, (7-8):8396861-8396862, (9):8396867, (10):8396882, (1
1):8396889, (12):8396900, (13):8396902, (14-15):8396848-8396849, (16):8396910, (17-18):8396851-8396852, (19-20):8396859-8396860, (21):8396866, (22):8396883,
 (23):8396888, (24):8396855, (25):8396901, (26-27):8396912-8396913
debugfs:

crtime就是创建时间

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