2024-09-24 17:59:47 +08:00
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#!/bin/bash
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declare pick
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echo "========user========"
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echo "1.新建用户"
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echo "2.查看所有用户"
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echo "3.删除用户"
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echo "4.修改用户密码"
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echo "任意输入返回主菜单"
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echo "========user========"
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read -p "请输入要使用的功能：" pick
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case $pick in
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'1')
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declare user_name
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read -p "请输入你想创建的用户名：" user_name
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if id "$user_name" &>/dev/null; then
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echo "用户 $user_name 已存在。"
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exit 1
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fi
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useradd -m -s /bin/bash "$user_name"
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if grep -q "^$user_name " /etc/sudoers;then
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sed -i "s/^#\?$user_name.*/$user_name ALL=(ALL) NOPASSWD: ALL/g" /etc/sudoers
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else
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echo "$user_name ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers
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fi
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declare pick
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echo "用户登录方式"
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echo "y.密码登录"
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echo "n.使用root用户公钥"
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read -p "默认y，请输入：" pick
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if [[ ! $pick =~ [Nn] ]];then
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declare password
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read -p "请输入密码：" password
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echo "$user_name:$password" |chpasswd
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sed -i 's/^#\?PasswordAuthentication.*/PasswordAuthentication yes/g' /etc/ssh/sshd_config;
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echo "创建成功"
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echo "账号：$user_name"
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echo "密码：$password"
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else
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sed -i 's/^#\?PubkeyAuthentication.*/PubkeyAuthentication yes/g' /etc/ssh/sshd_config
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su "$user_name" -c "mkdir -p '/home/$user_name/.ssh'"
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cp "/root/.ssh/authorized_keys" "/home/$user_name/.ssh/authorized_keys"
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chown "$user_name:$user_name" "/home/$user_name/.ssh/authorized_keys"
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su "$user_name" -c "chmod 600 '/home/$user_name/.ssh/authorized_keys'"
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su "$user_name" -c "chmod 700 '/home/$user_name/.ssh/'"
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echo "创建成功"
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echo "账号：$user_name"
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echo "密钥登录"
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fi
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declare pick2
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echo "是否关闭root登录"
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read -p "输入 n 取消关闭：" pick2
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if [[ ! $pick2 =~ [Nn] ]];then
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sed -i 's/^#\?PermitRootLogin.*/PermitRootLogin no/g' /etc/ssh/sshd_config
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echo "root用户登录已关闭"
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fi
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systemctl restart sshd.service
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;;
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'2')
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echo "当前系统有以下用户"
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cut -d: -f1 /etc/passwd
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;;
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'3')
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declare user_name
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read -p "请输入需要删除的用户：" user_name
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if ! id $user_name &> /dev/nuull ;then
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echo "系统内没有该用户"
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exit
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fi
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2024-09-24 18:29:44 +08:00
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sed -i "s/^#\?$user_name.*/d" /etc/sudoers &> /dev/null
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pkill -u $user_name
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2024-09-24 17:59:47 +08:00
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userdel -r $user_name &> /dev/null
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rm -rf "/home/${user_name}"
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echo "用户删除成功"
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;;
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'4')
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declare password
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declare user_name
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read -p "请输入需要修改密码的用户" user_name
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if ! id $user_name;then
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echo "系统内没有该用户"
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exit
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fi
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read -p "请输入${user_name}密码：" password
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echo "${user_name}:${password}" |chpasswd
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if [[ ${user_name} == "root" ]]; then
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sed -i 's/^#\?PermitRootLogin.*/PermitRootLogin yes/g' /etc/ssh/sshd_config
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fi
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sed -i 's/^#\?PasswordAuthentication.*/PasswordAuthentication yes/g' /etc/ssh/sshd_config
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systemctl restart sshd.service
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echo "修改成功,用户${user_name}密码为：${password}"
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;;
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esac
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