The method of realizing batch key-free login with shell

What this article shares with you is the method of shell to achieve batch key-free login. I believe most people have not yet learned this skill. In order to let you learn, I have summarized the following content for you. Without saying much, let's move on.

Note: ip.txt and send_ssh_key.sh must be in the same root directory

# write server information ip.txt according to the following format for key-free login #-# ipgroup passwordholders 192.168.1.110 VRV 7758521mm 192.168.1.111VOR 7758521VOG 192.168.1.112Rd 7758521pin ssh keyif # generate ssh keyif [!-f "/ root/.ssh/id_rsa"] Then echo "gen ssh key" ssh-keygen-t rsa-b 2048-N'- f / root/.ssh/id_rsafi# checks if expectif is installed! Expect-v & > / ipfor p in $(cat ip.txt | grep-v'#') in the dev/null;then echo "install expect" yum install expect-yfi# loop file Do ip=$ (echo "$p" | cut-F1-d ":") # take out the current IP password=$ (echo "$p" | cut-f2-d ":") # take out the current password # expect interactive process expect-c "spawn ssh-copy-id-I / root/.ssh/id_rsa.pub root@$ip expect {\" * yes/no*\ "{send\" yes\ r\ " Exp_continue}\ "* password*\" {send\ "$password\ r\"; exp_continue}\ "* Password*\" {send\ "$password\ r\";}} "

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