shell脚本通过expect实现自动单边无密登录功能

EXPECT=/usr/bin/expect 

$EXPECT <<EOF 
spawn ssh-keygen -t rsa 
expect "*ssh/id_rsa*" { 
  send -- "\r" 
  expect "*for no passphrase*" 
  send -- "\r" 
  expect "*passphrase again*" 
  send -- "\r" 
  exp_continue 
} 
EOF 
iplist=`cat /root/ip.list` 
for ip in $iplist 
do 
  $EXPECT <<EOF 
  spawn ssh-copy-id root@$ip 
  expect "*(yes/no)?*" { 
    send -- "yes\r" 
    expect "*?assword:*" 
    send -- "$PASSWD\r" 
  } "*?assword:*" { 
    send -- "$PASSWD\r" 
    exp_continue 
  } 
EOF 
done