用ls -l 可以看到有一个文档的硬链接数：

[root@localhost tmp]# ls -li

total 104

229415 drwxr-xr-x 2 root root 4096 Dec 11 21:15 etc

39757 -rw-r--r-- 2 root root 1602 Oct 30 14:56 hl_passwd

用一下语句可以查看一个文件有哪些硬链接

[root@localhost tmp]# find / -inum 39757

find: /proc/6266/task/6266/fd/4: No such file or directory

/etc/passwd

/tmp/hl_passwd

但是注意由于硬链接是不能跨文件系统的，所以

Add the `-xdev' option if you are starting the

search at a directory that has other filesystems mounted on it,