使用autofs挂载windows或samba共享

 有时收到文件系统报警，检查后发现原来是Linux里挂载的windows共享因为密码更改或服务down掉无法连接，就考虑这样静态的mount既无必要（就拷备份文件时用一下），又消耗资源，也有安全隐患。还是按需挂载，空闲时断开的方式比较好，所以利用系统常用的autofs来实现

1.检查和安装autofs

dpkg -l | grep autofs

sudo apt-get install autofs5

2.编辑/etc/auto.master文件，启用misc目录

root@localhost:~# cat /etc/auto.master
#
# Sample auto.master file
# This is an automounter map and it has the following format
# key [ -mount-options-separated-by-comma ] location
# For details of the format look at autofs(5).
#
/misc   /etc/auto.misc
#
# NOTE: mounts done from a hosts map will be mounted with the
#   "nosuid" and "nodev" options unless the "suid" and "dev"
#   options are explicitly given.
#
#/net   -hosts
#
# Include central master map if it can be found using
# nsswitch sources.
#
# Note that if there are entries for /net or /misc (as
# above) in the included master map any keys that are the
# same will not be seen as the first read key seen takes
# precedence.
#
+auto.master

3.修改/etc/auto.misc文件，添加cifs挂载项

root@localhost:~# cat /etc/auto.misc
backup      -fstype=cifs,username=backup_user@domain,password=backup_password      ://192.168.1.1/backup

4.重启autofs服务

root@localhost:~# service autofs restart

5.检查是否成功挂载

root@localhost:~# ls -l /misc/backup
total 3
drwxrwxrwx 1 root root    0 2011-02-16 10:25 dns_backup
drwxrwxrwx 1 root root    0 2011-02-16 09:37 mail_backup
drwxrwxrwx 1 root root    0 2011-02-16 09:30 system_backup
root@localhost:~# mount
...
//192.168.1.1/backup on /misc/backup type cifs (rw,mand)

值得注意的是如果通过AD域来认证，则要在用户名后加@domain（domain是AD域的域名，如company.com）才能成功挂载，尝试过用户名的另一种表示方法，domain\username，但不是每一次都能成功，所以选择前者。虽然挂载选项显示可读写，但要在远端服务器上设置相应的权限才能操作