linux 批量建立信任关系

1.首先，需要检查expect是否安装：rpm -qa|grep expect 2.然后，在操作机上创建公钥：ssh-keygen 一路回车即可 3.创建好之后到/home/barfoo/.ssh/下就可以看到id开头的2个文件，其中id_rsa.pub就是公钥文件， 4.需要做的就是将这个文件传送给其他机器：ssh-copy-id -i /home/barfoo/.ssh/id_rsa.pub barfoo@ip 5.最后ssh root@ip就实现无密码登录了 6.以下是脚本，根据自己实际情况做修

#2017-05-18
#批量ssh认证建立  

for p in $(cat /home/barfoo/ip.txt)  #注意ip.txt文件的绝对路径  
do  
ip=$(echo "$p"|cut -f1 -d":")       #取ip.txt文件中的ip地址  
password=$(echo "$p"|cut -f2 -d":") #取ip.txt文件中的密码  

#expect自动交互开始  
expect -c "   
spawn ssh-copy-id -i /home/barfoo/.ssh/id_rsa.pub barfoo@$ip  
        expect {   
                "*yes/no*" {send "yes
"; exp_continue}   
                "*password*" {send "$password
"; exp_continue}   
                "*Password*" {send "$password
";}   
        }   
"   
done

1. ip.txt文件里面ip和密码写法

172.16.4.27:barfoo1
172.16.4.28:barfoo2

1. 也可以这么写

for i in `seq 101 150`
do
/usr/bin/expect << EOF
spawn ssh-copy-id bfadmin@192.168.100.$i
expect {
"yes/no" { send "yes
"; exp_continue; }
"*password" { send "P@ssw0rd
" }
}

expect "~$ "
send "exit
"
expect eof

EOF
done

下载PSSH安装包

wget http://www.theether.org/pssh/pssh-1.4.3.tar.gz #下载PSSH安装包
tar zxvf pssh-1.4.3.tar.gz
cd pssh-1.4.3
wget 'http://peak.telecommunity.com/dist/ez_setup.py'
python ez_setup.py
python setup.py install

安装好后执行
pssh -P -h ip.txt 'uptime

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