1. for创建20用户
用户前缀由用户输入
用户初始密码由用户输入
例如:test01,test10
#!/bin/bash
# **********************************************************
# * Author : jiangzhier
# * Email : ???
# * Create time : 2023-01-03 06:11
# * Filename : question_one.sh
# * Description :
# **********************************************************
read -p "Please enter user name: " user
read -p "Please enter user initial password: " pd
for i in {1..20}
do
useradd $user$i
echo "Create user $user$i successfully"
echo "$user$i:$pd" | chpasswd
echo "Initial password changed successfully."
done
2. for ping测试指网段的主机
网段由用户输入,例如用户输入192.168.2 ,则ping 192.168.2.10 — 192.168.2.20
#!/bin/bash
# **********************************************************
# * Author : jiangzhier
# * Email : ???
# * Create time : 2023-01-03 06:18
# * Filename : question_two.sh
# * Description :
# **********************************************************
read -p "请输入网段(如192.168.2):" netwk
# 错误判断
for i in `seq 3`
do
a=`echo $netwk | cut -d "." -f$i`
if [ $a -lt 0 ] && [ $a -gt 254 ];then
echo "input error"
fi
done
for j in `seq 10 20`
do
if ping -c 2 $netwk.$j &>/dev/null;
then
echo "$netwk.$j is up" >> /tmp/host_up.txt
else
echo "$netwk.$j is down" >> /tmp/host_down.txt
fi
done
3. 使用for实现批量主机root密码的修改
成功或失败都必须记录
提示:主机IP存放在一个文件中
SSH:实现公钥认证,执行远程中主机命令
实现公钥认证