批量免密登录

#!/bin/bash
#批量实现SSH免密登录

#没有则安装expect
if ! rpm -q expect > /dev/null
then
echo "###expect 未安装，现在安装###"
yum install -y expect &>/dev/null
if [ $? -ne 0 ]
then
echo "###expect 安装失败###"
exit 1
fi
fi

#本机没有SSH密钥则生成
if [ ! -f ~/.ssh/id_rsa ]
then
echo "###请按3次enter键###"
ssh-keygen -t rsa
fi

ssh_expect () {
expect -c "set timeout -1;
spawn ssh-copy-id -f $1

expect {
"yes/no" { send -- yes\r;exp_continue;}
"password:" { send -- $2\r;exp_continue;}
eof
}";
}

[ -f hosts.txt ] && rm -rf hosts.txt

#定义 hosts.txt
cat > hosts.txt << EOF
192.168.29.121

EOF

passwd=Fws@aISINO123

for ip in `cat hosts.txt |awk '{print $1}'`
do
ssh_expect $ip $passwd
done