寫了一個script搞不懂,為什麼不行?【求助】

[ericshei]

原始碼如下

#!/bin/bash
echo "Please keyin your account"
read account
echo "Please keyin your password"
read password
echo "Please keyin remote path"
read sadd
echo "Please keyin local mount point"
read dadd

echo $account
echo $password
echo $sadd
echo $dadd
all="mount -t smbfs -o username="$account",password="$password" -o rw -o iocharset=big5 -o codepage=950 "$sadd" "$dadd""
echo $all
mount -t smbfs -o username="$account",password="$password" -o rw -o iocharset=big5 -o codepage=950 "$sadd" "$dadd"



執行過程及結果如下

[root@mdk90 mnt]# sh go1.sh
Please keyin your account
ericshei
Please keyin your password
abcde
Please keyin remote path
"//piii-1g/ftp (F)"
Please keyin local mount point
/mnt/home/40g
ericshei
abcde
"//piii-1g/ftp (F)"
/mnt/home/40g
mount -t smbfs -o username=ericshei,password=abcde -o rw -o iocharset=big5 -o codepage=950 "//piii-1g/ftp (F)" /mnt/home/40g --->變數$all的內容
Usage: mount.smbfs service mountpoint [-o options,...]
Version 2.2.6pre2

Options:
username= SMB username
password= SMB password
credentials= file with username/password
netbiosname= source NetBIOS name
uid= mount uid or username
gid= mount gid or groupname
port= remote SMB port number
fmask= file umask
dmask= directory umask
debug= debug level
ip= destination host or IP address
workgroup= workgroup on destination
sockopt= TCP socket options
scope= NetBIOS scope
iocharset= Linux charset (iso8859-1, utf8)
codepage= server codepage (cp850)
ttl= dircache time to live
guest don't prompt for a password
ro mount read-only
rw mount read-write

This command is designed to be run from within /bin/mount by giving
the option '-t smbfs'. For example:
mount -t smbfs -o username=tridge,password=foobar //fjall/test /data/test
[root@mdk90 mnt]# mount -t smbfs -o username=ericshei,password=abcde -o rw -o iocharset=big5 -o codepage=950 "//piii-1g/ftp (F)" /mnt/home/40g--->貼上變數$all的內容執行就接收
[root@mdk90 mnt]# cd home/
[root@mdk90 home]# cd ..
[root@mdk90 mnt]# cd home/40g/
[root@mdk90 40g]# ls
albums/ FTP/ _NIM4711.TMP* RECYCLER/ Rich6/ System Volume Information/ video/ WUTemp/
[root@mdk90 40g]# df -h
檔案系統 容量 已用 可用 已用% 掛載點
/dev/hda5 945M 86M 812M 10% /
/dev/hda1 15M 3.0M 11M 23% /boot
/dev/hda9 1.1G 251M 789M 25% /home
/dev/hda10 387M 9.0M 358M 3% /tmp
/dev/hda7 2.9G 2.0G 827M 71% /usr
/dev/hda8 1018M 132M 835M 14% /var
//piii-1g/ftp_(G) 75G 30G 45G 40% /mnt/home/80g
//piii-1g/ftp_(F) 38G 30G 7.7G 80% /mnt/home/40g
成功的mount 起來

Why??