如何使用chmod?(图文教程)

1、以目录/home/test为例，可以看到用户redhat3对其有读写执行的权利，而和redhat3用户同一组root吹涡皋陕用户以及其他用户只有读和执行权利，但是没有写的权利[root@localhost home]# ls -altotal 36drwxr-xr-x 6 root root 4096 Jan 28 12:20 .drwxr-xr-x 21 root root 4096 Jan 27 20:20 ..drwxr-xr-x 5 redhat3 redhat3 4096 Jan 28 11:57 edadrwx------ 2 root root 16384 Jan 25 20:40 lost+founddrwx------ 13 redhat3 redhat3 4096 Jan 28 12:03 redhat3drwxr-xr-x 2 redhat3 root 4096 Jan 28 12:20 test[root@localhost home]#

2、若执行下列命令的话，则用户redhat3和同一组root的用户都有读写执行的权利，但是其他用户读写执行都没有权利[root@localhost home]# chmod 770 /home/test/[root@localhost home]# ls -altotal 36drwxr-xr-x 6 root root 4096 Jan 28 12:20 .drwxr-xr-x 21 root root 4096 Jan 27 20:20 ..drwxr-xr-x 5 redhat3 redhat3 4096 Jan 28 11:57 edadrwx------ 2 root root 16384 Jan 25 20:40 lost+founddrwx------ 13 redhat3 redhat3 4096 Jan 28 12:03 redhat3drwxrwx--- 2 redhat3 root 4096 Jan 28 12:20 test

3、若执行下列命令，则redhat3用户和同一root组用户以及其他用户都有读写执行的权利[root@localhost home]# chmod 777 /home/test/[root@localhost home]# ls -altotal 36drwxr-xr-x 6 root root 4096 Jan 28 12:20 .drwxr-xr-x 21 root root 4096 Jan 27 20:20 ..drwxr-xr-x 5 redhat3 redhat3 4096 Jan 28 11:57 edadrwx------ 2 root root 16384 Jan 25 20:40 lost+founddrwx------ 13 redhat3 redhat3 4096 Jan 28 12:03 redhat3drwxrwxrwx 2 redhat3 root 4096 Jan 28 12:20 test

4、若执行下列命令，则redhat3用户和同一root组用户，有读写执行的权利，而其他用户只有读写权利，而没有执行权利[root@localhost home]# chmod 776 /home/test/[root@localhost home]# ls -altotal 36drwxr-xr-x 6 root root 4096 Jan 28 12:20 .drwxr-xr-x 21 root root 4096 Jan 27 20:20 ..drwxr-xr-x 5 redhat3 redhat3 4096 Jan 28 11:57 edadrwx------ 2 root root 16384 Jan 25 20:40 lost+founddrwx------ 13 redhat3 redhat3 4096 Jan 28 12:03 redhat3drwxrwxrw- 2 redhat3 root 4096 Jan 28 12:20 test

5、若执行下列命筠沭鱿漆令，则redhat3用户和同一root组用户，有读写执行的权利，而其他用户只有读和执行写权利，而没有写权利[root@localhost home]# chmod 775 /home/test/[root@localhost home]# ls -altotal 36drwxr-xr-x 6 root root 4096 Jan 28 12:20 .drwxr-xr-x 21 root root 4096 Jan 27 20:20 ..drwxr-xr-x 5 redhat3 redhat3 4096 Jan 28 11:57 edadrwx------ 2 root root 16384 Jan 25 20:40 lost+founddrwx------ 13 redhat3 redhat3 4096 Jan 28 12:03 redhat3drwxrwxr-x 2 redhat3 root 4096 Jan 28 12:20 test

6、若执行下列命筠沭鱿漆令，则redhat3用户和同一root组用户，有读写执行的权利，而其他用户只有读权利，而没有写和执行权利[root@localhost home]# chmo颊俄岿髭d 774 /home/test/[root@localhost home]# ls -altotal 36drwxr-xr-x 6 root root 4096 Jan 28 12:20 .drwxr-xr-x 21 root root 4096 Jan 27 20:20 ..drwxr-xr-x 5 redhat3 redhat3 4096 Jan 28 11:57 edadrwx------ 2 root root 16384 Jan 25 20:40 lost+founddrwx------ 13 redhat3 redhat3 4096 Jan 28 12:03 redhat3drwxrwxr-- 2 redhat3 root 4096 Jan 28 12:20 test

7、若执行下列命令，则redhat3用户和同一root组用户，有读写执行的权利，而其他用户只有写权利，而没有读和执行权利[root@localhost home]# chmod 772 /home/test/[root@localhost home]# ls -altotal 36drwxr-xr-x 6 root root 4096 Jan 28 12:20 .drwxr-xr-x 21 root root 4096 Jan 27 20:20 ..drwxr-xr-x 5 redhat3 redhat3 4096 Jan 28 11:57 edadrwx------ 2 root root 16384 Jan 25 20:40 lost+founddrwx------ 13 redhat3 redhat3 4096 Jan 28 12:03 redhat3drwxrwx-w- 2 redhat3 root 4096 Jan 28 12:20 test

8、若执行下列命令，则redhat3用户和同一root组用户，有读写执行的权利，而其他用户只有执行权利，而没有读和写权利[root@localhost home]# chmod 771 /home/test/[root@localhost home]# ls -altotal 36drwxr-xr-x 6 root root 4096 Jan 28 12:20 .drwxr-xr-x 21 root root 4096 Jan 27 20:20 ..drwxr-xr-x 5 redhat3 redhat3 4096 Jan 28 11:57 edadrwx------ 2 root root 16384 Jan 25 20:40 lost+founddrwx------ 13 redhat3 redhat3 4096 Jan 28 12:03 redhat3drwxrwx--x 2 redhat3 root 4096 Jan 28 12:20 test