Linux操作记录7--用户增删改查相关操作

创建（管理员）用户

#!/bin/sh
USERNAME=[username]

# 1代表有sudo权限，0代表普通用户
SUDO_FLAG=1

PUBKEY="ssh-rsa xxx"


if id "${USERNAME}" &>/dev/null; then
    echo 'adduser: user '${USERNAME}' already exists'
    exit 0
else
    adduser ${USERNAME}
    mkdir /home/${USERNAME}/.ssh
    chmod 700 /home/${USERNAME}/.ssha
    touch /home/${USERNAME}/.ssh/authorized_keys
    chmod 600 /home/${USERNAME}/.ssh/authorized_keys
    echo ${PUBKEY} >> /home/${USERNAME}/.ssh/authorized_keys
    chown ${USERNAME}:${USERNAME} /home/${USERNAME}/.ssh/*
    chown ${USERNAME}:${USERNAME} /home/${USERNAME}/.ssh

    #depends whether sudo right is needed for the user
    if [ $SUDO_FLAG -eq 1 ]; then
        touch /etc/sudoers.d/${USERNAME}
        echo ${USERNAME}' ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers.d/${USERNAME}
        echo yi.chen' ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers.d/yi.chen
        chmod 640 /etc/sudoers.d/${USERNAME}
    fi
fi

chage -I -1 -m 0 -M 99999 -E -1 ${USERNAME}

if [ $? -eq 0 ]; then
    echo 'Success! Created user '${USERNAME}' '
else
    echo 'Failed! user:'${USERNAME}''
fi

删除（管理员）用户

# 查询普通用户并删除
cat /etc/passwd | grep username
sudo userdel -r username

# 查看用户有没有设定定时任务，有的话记得删除
sudo crontab -u username -l

# 删除与用户相关的sudoers文件
sudo rm /etc/sudoers.d/username