摘要：
4.执行脚本sudoyuminstallexpect.functionsettingSShNoLogin(){echo"settingsshnologin"pwd=""keyGen="ssh-keygen-trsa-f$HOME/.ssh/id_rsa"chmod="chmodg-w$HOME/.ssh/authorized_keys"machinedPwd="*****"echo"step1-˃settingprivatekey"$keyGenecho"step2-˃chmodforpublickey"if[!
1.在A机生成公钥和私钥
ssh-keygen -t rsa –P
一般采用的ssh的rsa密钥:
id_rsa 私钥
id_rsa.pub 公钥
下述命令产生不同类型的密钥
ssh-keygen -t dsa2.把A机下的/root/.ssh/id_rsa.pub 复制到B机的 /root/.ssh/authorized_keys文件里，先要在B机上创建好 /$HOME/.ssh 这个目录，用scp复制。
scp XXX@192.168.1.12:/$HOME/.ssh/id_rsa.pub $HOME/.ssh/
cat id_rsa.pub >>$HOME/.ssh/authorized_keys
chmod 600 $HOME/.ssh/authorized_keys
3.如果要互相免密码登陆，则需要在将B机的公钥拷贝到A机上。
4.执行脚本
sudo yum installexpect. function settingSShNoLogin(){ echo "setting ssh no login" pwd="" keyGen="ssh-keygen -t rsa -f $HOME/.ssh/id_rsa" chmod="chmod g-w $HOME/.ssh/authorized_keys" machinedPwd="*****" echo "step 1->setting private key" $keyGen echo "step 2->chmod for public key" if [ ! -f "$HOME/.ssh/authorized_keys" ];then cat > $HOME/.ssh/authorized_keys fi cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys $chmod echo "step 3->merge authorized_keys file" OLD_IFS="$IFS" IFS="," nodeHosts=($NODE_HOSTS) IFS="$OLD_IFS" for node in${nodeHosts[@]} do if [ "$node" != "$machine_name" ]; then expect -c "set timeout -1; spawn ssh-copy-id -i $HOME/.ssh/id_rsa.pub conversant@$node; expect { *(yes/no)* {send --yes ;exp_continue;} *assword:* {send --$machinedPwd ;exp_continue;} eof {exit 0;} }"; fi done }