Linux目录读写执行权限分析

[xkz@10_29_1_54 ~]$ chmod 000 test
[xkz@10_29_1_54 ~]$ ls -l
total 4
d--------- 2 xkz xkz 4096 Jan 30 10:47 test
[xkz@10_29_1_54 ~]$ ls -l test
ls: cannot open directory test: Permission denied

单执行单写单读

[xkz@10_29_1_54 ~]$ chmod 111 test
[xkz@10_29_1_54 ~]$ ls -l
total 4
d--x--x--x 2 xkz xkz 4096 Jan 30 10:47 test
[xkz@10_29_1_54 ~]$ ls -l test
ls: cannot open directory test: Permission denied

[xkz@10_29_1_54 ~]$ chmod 222 test
[xkz@10_29_1_54 ~]$ ls -l
total 4
d-w--w--w- 2 xkz xkz 4096 Jan 30 10:47 test
[xkz@10_29_1_54 ~]$ ls -l test
ls: cannot open directory test: Permission denied

[xkz@10_29_1_54 ~]$ chmod 444 test
[xkz@10_29_1_54 ~]$ ls -l
total 4
dr--r--r-- 2 xkz xkz 4096 Jan 30 10:47 test
[xkz@10_29_1_54 ~]$ ls -l test
ls: cannot access test/f1: Permission denied
total 0
-????????? ? ? ? ?            ? f1

里面文件有权限，文件夹只有执行权限可读

[xkz@10_29_1_54 ~]$ chmod 777 test/f1 
[xkz@10_29_1_54 ~]$ chmod 111 test
[xkz@10_29_1_54 ~]$ ls -l test
ls: cannot open directory test: Permission denied

[xkz@10_29_1_54 ~]$ cat test/f1
hello

需要读和执行权限5 同时才算我们理解的有权限

读+写
[xkz@10_29_1_54 ~]$ chmod 666 test
[xkz@10_29_1_54 ~]$ ls -l
total 4
drw-rw-rw- 2 xkz xkz 4096 Jan 30 10:47 test
[xkz@10_29_1_54 ~]$ cat test/f1
cat: test/f1: Permission deniedc
读+执行
[xkz@10_29_1_54 ~]$ chmod 555 test
[xkz@10_29_1_54 ~]$ ls -l
total 4
dr-xr-xr-x 2 xkz xkz 4096 Jan 30 10:47 test
[xkz@10_29_1_54 ~]$ ls -l test
total 4
-rw-rw-r-- 1 xkz xkz 6 Jan 30 10:47 f1
[xkz@10_29_1_54 ~]$ cat test/f1 
hello

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