1、对于目录来说 rwx含义
#r read 查看目录里面的内容 ls
#w write 可以在目录中 创建 删除 重命名文件
#x execute 是否可以进入(cd)目录中
2、测试环境
mkdir -p /oldboy/test
chown oldboy.oldboy /oldboy/test
touch /oldboy/test/stu{01..5}.txt
3、目录的R权限
##root 目录r权限
[root@oldboyedu42-lnb oldboy]# ll -d test
drwxr-xr-x. 2 oldboy oldboy 4096 Nov 3 19:16 test
[root@oldboyedu42-lnb oldboy]# chmod u=r test
[root@oldboyedu42-lnb oldboy]# ll -d test
dr--r-xr-x. 2 oldboy oldboy 4096 Nov 3 19:16 test
##oldboy 目录r权限
[oldboy@oldboyedu42-lnb oldboy]$ ls -ld test
dr--r-xr-x. 2 oldboy oldboy 4096 Nov 3 19:16 test
[oldboy@oldboyedu42-lnb oldboy]$ ls test
ls: cannot access test/stu01.txt: Permission denied
ls: cannot access test/del.log: Permission denied
ls: cannot access test/stu02.txt: Permission denied
ls: cannot access test/stu03.txt: Permission denied
ls: cannot access test/stu04.txt: Permission denied
ls: cannot access test/stu05.txt: Permission denied
ls: cannot access test/del.sh: Permission denied
del.log del.sh stu01.txt stu02.txt stu03.txt stu04.txt stu05.txt
[oldboy@oldboyedu42-lnb oldboy]$ ls -l test
ls: cannot access test/stu01.txt: Permission denied
ls: cannot access test/del.log: Permission denied
ls: cannot access test/stu02.txt: Permission denied
ls: cannot access test/stu03.txt: Permission denied
ls: cannot access test/stu04.txt: Permission denied
ls: cannot access test/stu05.txt: Permission denied
ls: cannot access test/del.sh: Permission denied
total 0
-????????? ? ? ? ? ? del.log
-????????? ? ? ? ? ? del.sh
-????????? ? ? ? ? ? stu01.txt
-????????? ? ? ? ? ? stu02.txt
-????????? ? ? ? ? ? stu03.txt
-????????? ? ? ? ? ? stu04.txt
-????????? ? ? ? ? ? stu05.txt
4、目录的RX权限
##root 目录rx权限
[root@oldboyedu42-lnb oldboy]# chmod u=rx test
[root@oldboyedu42-lnb oldboy]# ll -d test
dr-xr-xr-x. 2 oldboy oldboy 4096 Nov 3 19:16 test
##oldboy查看
[oldboy@oldboyedu42-lnb oldboy]$ ls -ld test
dr-xr-xr-x. 2 oldboy oldboy 4096 Nov 3 19:16 test
[oldboy@oldboyedu42-lnb oldboy]$ ls -l test
total 8
-rw-r--r-- 1 root root 7 Oct 24 13:46 del.log
-rw-r--r--. 1 root root 7 Oct 24 08:52 del.sh
-rw-r--r-- 1 root root 0 Nov 3 19:16 stu01.txt
-rw-r--r-- 1 root root 0 Nov 3 19:16 stu02.txt
-rw-r--r-- 1 root root 0 Nov 3 19:16 stu03.txt
-rw-r--r-- 1 root root 0 Nov 3 19:16 stu04.txt
-rw-r--r-- 1 root root 0 Nov 3 19:16 stu05.txt
小结：
1.目录的r权限，查看目录里面内容
2.目录来说r权限 需要有x配合
3.对于目录来说x权限，cd 你是否能查看或修改目录里面文件属性
5、目录的W权限
##root 目录w权限
[root@oldboyedu42-lnb oldboy]# chmod u=w test
[root@oldboyedu42-lnb oldboy]# ll -d test
d-w-r-xr-x. 2 oldboy oldboy 4096 Nov 3 19:16 test
##oldboy 目录w权限
[oldboy@oldboyedu42-lnb oldboy]$ ls -ld test
d-w-r-xr-x. 2 oldboy oldboy 4096 Nov 3 19:16 test
[oldboy@oldboyedu42-lnb oldboy]$ touch test/oldboy.txt
touch: cannot touch `test/oldboy.txt': Permission denied
[oldboy@oldboyedu42-lnb oldboy]$ rm -f test/stu01.txt
command bny -f test/stu01.txt
[oldboy@oldboyedu42-lnb oldboy]$ m -f test/stu01.txt
rm: cannot remove `test/stu01.txt': Permission denied
[oldboy@oldboyedu42-lnb oldboy]$ m -f test/stu01.txt
rm: cannot remove `test/stu01.txt': Permission denied
[oldboy@oldboyedu42-lnb oldboy]$ m -f test/stu01.txt
rm: cannot remove `test/stu01.txt': Permission denied
6、目录的WX权限
##root 目录wx权限
[root@oldboyedu42-lnb oldboy]# chmod u=wx test
[root@oldboyedu42-lnb oldboy]# ll -d test
d-wxr-xr-x. 2 oldboy oldboy 4096 Nov 3 19:16 test
##oldboy 目录wx权限
[oldboy@oldboyedu42-lnb oldboy]$ ls -ld test
d-wxr-xr-x. 2 oldboy oldboy 4096 Nov 3 19:16 test
[oldboy@oldboyedu42-lnb oldboy]$ touch test/oldboy.txt
[oldboy@oldboyedu42-lnb oldboy]$ touch test/oldboy.txt
[oldboy@oldboyedu42-lnb oldboy]$ ls test
ls: cannot open directory test: Permission denied
[oldboy@oldboyedu42-lnb oldboy]$ ls -l test/oldboy.txt
-rw-rw-r-- 1 oldboy oldboy 0 Nov 3 19:30 test/oldboy.txt
[oldboy@oldboyedu42-lnb oldboy]$ ls -l test/oldboy.tx
ls: cannot access test/oldboy.tx: No such file or directory
[oldboy@oldboyedu42-lnb oldboy]$ m -f test/stu01.txt
[oldboy@oldboyedu42-lnb oldboy]$ m -f test/stu01.txt
小结
目录的w权限：
1.w权限表示 可以在目录中 创建 删除 重命名文件
2.w权限需要x权限配合
[root@oldboyedu42-lnb ~]# cd /etc/
[root@oldboyedu42-lnb etc]# touch oldboy.txt
[root@oldboyedu42-lnb etc]# chmod 777 oldboy.txt
[oldboy@oldboyedu42-lnb etc]$ m -f oldboy.txt
rm: cannot remove `oldboy.txt': Permission denied
7、目录权限小结：
1.r 查看目录内容 ，需要x权限配合
2.w 在目录里面创建 删除 重命名文件 ，需要x权限配合
3.x 进入到目录 查看目录中文件的属性
练习题：
详细说出rwx在目录中的意义