shell相关之expect

短命女 2022-05-25 06:53 198阅读 0赞

### 当你不能把交互式的命令变成非交互式的命令时使用 ###

\# passwd user1 //交互式

# echo 123456 | passwd --stdin user1 //非交互式

#!/bin/bash ip="172.16.70.251" yum install expect -y if grep 251 /etc/hosts then : else echo "$ip test.up.com">> /etc/hosts fi

expect -c "  
set timeout 300;  
spawn ssh $ip;                   //spanwn 生成的意思  
expect \{                               // expect 捕获的意思  
\\"yes/no\\" \{ send \\"yes\\n\\"; exp\_continue \}             //send 发送的意思  
\\"password:\\" \{ send \\"uplooking\\n\\";interact \}  
\}  
"

下面是安装expect并制作公钥使能够无交互式向172.16.70.251主机传送公钥，实现无交互式连接 #!/bin/bash ip="172.16.70.251" if [ -f /usr/bin/expect ];then : else yum install expect -y fi if grep 251 /etc/hosts then : else echo "$ip test.up.com">> /etc/hosts fi rm -rf /root/.ssh/* /usr/bin/expect <<EOF set timeout 300 spawn ssh-keygen expect "Enter file in which to save the key (/root/.ssh/id_rsa):" send "\n" expect "Enter passphrase (empty for no passphrase):" send "\n" expect "Enter same passphrase again:" send "\n" spawn ssh-copy-id 172.16.70.251 expect { "yes/no" { send "yes\n"; exp_continue } "root@172.16.70.251's password:" { send "qianfeng\n"} } expect eof //因为这里有 EOF<< EOF 所以expect eof必须写 EOF ssh-add ssh 172.16.70.251

和上面相似 #!/bin/bash #expect实例 #author:wing read -p "Your Name: " name ip="172.16.70.251" if [ -f /usr/bin/expect ];then : else yum install expect -y fi if grep 251 /etc/hosts then : else echo "$ip test.up.com">> /etc/hosts fi #生成并拷贝ssh_key到远程机器 rm -rf /root/.ssh/* /usr/bin/expect <<EOF set timeout 30 spawn ssh-keygen expect "Enter file in which to save the key (/root/.ssh/id_rsa):" send "\n" expect "Enter passphrase (empty for no passphrase):" send "\n" expect "Enter same passphrase again:" send "\n" spawn ssh-copy-id 172.16.70.251 expect { "yes/no" { send "yes\n"; exp_continue } "root@172.16.70.251's password:" { send "uplooking\n"} } expect eof EOF ssh-add #远程登录并执行命令 /usr/bin/expect <<EOF spawn ssh $ip expect "test" send "echo $name >> /var/ftp/1020name.txt\n" send "不要动!!请等待清屏结束" expect eof EOF clear

设置账户密码： #!/usr/bin/expect #set user [lindex $argv 0] #set password [lindex $argv 1] set user wing set password wing spawn passwd $user expect "password:" send "$password\r" expect "password:" send "$password\r" expect eof

#!/usr/bin/expect -f #set ip [lindex $argv 0 ] #set dir [lindex $argv 1 ] #set file [lindex $argv 2 ] set ip 192.168.1.252 set download_file [lindex $argv 0 ] set local_dir / set timeout 20 spawn ftp $ip expect "Name*" send "robin\r" expect "Password:*" send "1\r" expect "ftp>*" send "lcd $local_dir\r" expect "ftp>*" send "get $download_file\r" expect "ftp>" send "quit\r" expect eof

### **su到root后保持交互式**： ###

# cat su1.sh #!/usr/bin/expect set timeout 300 spawn su - root expect "Password:" send "123\n" interact

#cat su2.sh #!/usr/bin/expect set timeout 1 spawn su - user2 #生成命令 expect "Password:" #捕获关键字 send "123\n" #发送密码和回车 expect "$" send "/wing_sh/aa/a.sh\n" #切换账户完毕执行其他命令或脚本 interact