推送公钥：

!#/bin/bash
if [! -f ~/.ssh/id_rsa ] ;thenssh-keygen -P "" -f ~/.ssh/id_rsa
fifor i in `seq 100`
do {ip=192.168.1.$iping  -c1 $ip &>/dev/nullif [ $? -eq 0];thenecho $ip |tee addreee/usr/bin/expect<<-EOFset time 10spawn ssh-copy-id $ipexpect {"(yes/no)" {send "yes\r";exp_continue}"password" {send "up\r"}}expect eofEOF} &
donewait

修改配置：

#!/bin/bash
for i in `cat address.txt`
do
{ssh $ip "sed -ri '/^#UseDns/c\UseDns no' /etc/ssh/sshd_config"}&
done
wait

修改密码:

#!/bin/bash
read -p "please input password" :pass
for ip in `cat address.txt`
do
{ping -c1 -W1 $ip &>/dev/nullif [ $? -eq 0];thenssh $ip "echo $pass | passwd --stdin root"&>/dev/nullif [ $? -eq 0 ];thenecho "$(date +%F) $ip">>ok.txtelseecho "$(date +%F) $ip">>fail.txtfielseecho "$(date +%F) $ip">>fail.txt
fi
}&
done
wait

批量创建用户：

#!/bin/bash
pass="121212"
red=\e[1;31m
redset=\e[0m
if[ $# -eq 0];thenecho "参数小于0"
fi
if [ -f $1 ];thenecho "error file"return 2
fi
for user in `cat $1`
doid $user &>/dev/nullif [ $? -eq 0 ];thenecho "user is exits"elseuseradd $userecho $pass | passwd --stdin $user"&>/dev/nullif [ $? -eq 0 ];thenecho -e  "$red $user $redset created"fi
done