shell expect
expect的核心是spawn、expect、send、set。
spawn调用要执行的命令
expect监听交互输出
send进行交互输入
set设置变量值
interact交互完后，将控制权交给控制台
expect eof，与spawn对应，表示捕捉终端输出信息终止，类似if…endif
#!/bin/bash
passwd=“123456”
cat iplist |while read line
do
/usr/bin/expect <<EOF
set timeout 10
spawn ssh root@KaTeX parse error: Can't use function '\r' in math mode at position 51: …no" { send "yes\̲r̲";exp_continue …passwd\r"}
}
expect "]#"
send "ifconfig\r"
send "exit\r"
expect eof
EOF
done
exit 0
