执行该实例：./test.exp
如果报错-bash: ./test.exp: Permission denied,给744权限即可。
[root@localhost shell.sh]# vim test.exp
#!/usr/bin/expect
set ip 192.168.1.106
set user root
set password jiajie
set timeout 30
spawn ssh -l $user $ip
expect {
"(yes/no)?" { send "yesr";exp_continue }
"password:" { send "$passwordr" }
}
interact
set:设置变量，后面直接变量，通过“$变量名”来调用
[root@localhost shell.sh]# vim test.exp
!/usr/bin/expect
if {$argc!=3} {
send_user "Usage:expect need three arguments:ip user passwordn"
exit 1
}
set ip [lindex $argv 0]
set user [lindex $argv 1]
set password [lindex $argv 2]
set timeout 30
spawn ssh -l $user $ip
expect {
"(yes/no)?" { send "yesr";exp_continue }
"password:" { send "$passwordr" }
}
interact
[lindex $argv num]：表示位置参数，从num=0开始
send_user: 打印当前提示，相当于shell里的echo.
[root@localhost shell.sh]# vim test.exp
!/usr/bin/expect
if {$argc!=3} {
send_user "Usage:expect need three arguments:ip user passwordn"
exit 1
}
set ip [lindex $argv 0]
set user [lindex $argv 1]
set password [lindex $argv 2]
set timeout 30
spawn ssh -l $user $ip
expect {
"(yes/no)?" { send "yesr";exp_continue }
"password:" { send "$passwordr" }
}
expect "]#" { send "useradd jjr" }
expect "]#" { send "echo jiajie|passwd --stdin jjr" }
send "exitr"
expect eof
exit -onexit {
send_user "useradd jj is successfully.n"
send_user "Jobs has finished,Goodbye.n"
}
执行后的结果输出：
[root@localhost shell.sh]# ./test.exp 192.168.1.106 root jiajie
spawn ssh -l root 192.168.1.106
root@192.168.1.106's password:
Last login: Sat Sep 9 03:47:48 2017 from web
[root@localhost ~]# useradd jj
[root@localhost ~]# echo jiajie|passwd --stdin jj
Changing password for user jj.
passwd: all authentication tokens updated successfully.
[root@localhost ~]# exit
logout
Connection to 192.168.1.106 closed.
useradd jj is successfully.
Jobs has finished,Goodbye.
send "exitr":登录出当前环境。
expect eof：结束expect匹配。
exit -onexit{...}：打印结束的提示信息。
[root@localhost shell.sh]# vim test.sh
!/bin/bash
ip=$1
user=$2
password=$3
expect <<EOF
set timeout 10
spawn ssh -l $user $ip
expect {
"yes/no" { send "yesn";exp_continue }
"password" { send "$passwordn" }
}
expect "]#" { send "useradd jjn" }
expect "]#" { send "echo jiajie|passwd --stdin jjn" }
expect "]#" { send "exitn" }
expect eof
EOF
执行后的输出结果：
[root@localhost shell.sh]# ./test.sh 192.168.1.106 root jiajie
spawn ssh -l root 192.168.1.106
root@192.168.1.106's password:
Last login: Sat Sep 9 04:10:46 2017 from web
[root@localhost ~]# useradd jj
[root@localhost ~]# echo jiajie|passwd --stdin jj
Changing password for user jj.
passwd: all authentication tokens updated successfully.
[root@localhost ~]# exit
logout
Connection to 192.168.1.106 closed.
[root@localhost shell.sh]#
通过shell脚本通过调用expect脚本实现批量认证:
expect脚本：
[root@localhost shell.sh]# vim scp.exp
!/usr/bin/expect
if {$argc!=3} {
send_user "Usage:expect need three arguments lisk thks:file host dirn"
exit 1
}
set srcname [lindex $argv 0]
set hostname [lindex $argv 1]
set destname [lindex $argv 2]
set password "jiajie"
spawn scp $srcname root@$hostname:$destname
set timeout 30
expect {
-timeout 2
"yes/no" {send "yesr";exp_continue}
"*password:" {send "$passwordr"}
timeout {puts "expect connect failure,please contact admin.";return}
}
expect eof
exit -onexit {
send_user "Jobs has finished,Goodbye.n"
}
shell脚本：
[root@localhost shell.sh]# vim scp.sh
!/bin/bash
if [[ "$#" != "2" ]];then
echo "Usage:$0 src_filename des_filename"
exit 0
fi
IP_LIST=(
192.168.1.106
192.168.1.170
192.168.1.10
)
. /etc/init.d/functions
for ip in ${IP_LIST[*]}
do
expect scp.exp $1 $ip $2 &> /dev/null
if [ $? -eq 0 ];then
action "$ip" /bin/true
else
action "$ip" /bin/false
fi
done
scp.sh脚本通过调用expect脚本来实现分发功能。执行结果如下：
[root@localhost shell.sh]# sh scp.sh /etc/fstab /tmp/
192.168.1.106 [ OK ]
192.168.1.170 [ OK ]
192.168.1.10 [FAILED]
因为并没有192.168.1.10所有报错。
（编辑：李大同）
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