使用autofs掛載windows或samba共享

 有時收到文件系統報警，檢查後發現原來是Linux裏掛載的windows共享因爲密碼更改或服務down掉無法連接，就考慮這樣靜態的mount既無必要（就拷備份文件時用一下），又消耗資源，也有安全隱患。還是按需掛載，空閒時斷開的方式比較好，所以利用系統常用的autofs來實現

1.檢查和安裝autofs

dpkg -l | grep autofs

sudo apt-get install autofs5

2.編輯/etc/auto.master文件，啓用misc目錄

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掛載項

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

4.重啓autofs服務

root@localhost:~# service autofs restart

5.檢查是否成功掛載

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過AD域來認證，則要在用戶名後加@domain（domain是AD域的域名，如company.com）才能成功掛載，嘗試過用戶名的另一種表示方法，domain\username，但不是每一次都能成功，所以選擇前者。雖然掛載選項顯示可讀寫，但要在遠端服務器上設置相應的權限才能操作