我的机器上有 2 个用户：linuxlite和otheruser.
otheruser 有一个文件：
otheruser@linuxlite:~$ ls -l a
-rw-rw-r-- 1 otheruser otheruser 6 Mar 31 12:47 a
otheruser@linuxlite:~$ cat a
hello
linuxlite制作了一个文件和一个符号链接/tmp：
otheruser@linuxlite:~$ ls -l /tmp/file /tmp/link
-rw-rw-r-- 1 linuxlite linuxlite 3 Mar 31 12:49 /tmp/file
lrwxrwxrwx 1 linuxlite linuxlite 17 Mar 31 12:49 /tmp/link -> /home/otheruser/a
现在，虽然otheruser可以阅读/tmp/file和/home/otheruser/a，但他无法阅读/tmp/link：
otheruser@linuxlite:~$ cat /tmp/file
hi
otheruser@linuxlite:~$ cat /home/otheruser/a
hello
otheruser@linuxlite:~$ cat /tmp/link
cat: /tmp/link: Permission denied
我的问题是， …