Linux 批量创建和删除用户

Linux 批量创建和删除用户

以 bash 运行下面的脚本可以批量新建指定用户，并为其创建工作目录：

#!/bin/bash

USERS=("aa" "bb")           # user names to create
PASSWDS=("aaxx" "bbxx") # corresponding passwords for users
DATA_DIRS=("/hdd" "/ssd")    # root data directories

# Get confirmation from user before creation
echo "Do you want to create the following users and their data directories?"
echo "------ users ----------------"
for user in ${USERS[@]}; do
    echo "$user"
done
echo "------ root data dirs -------"
for dir in ${DATA_DIRS[@]}; do
    echo "$dir"
done
echo "-----------------------------"
echo "(y/n)"
read CONFIRM_DELETE

if [ "$CONFIRM_DELETE" == "y" ]; then
    for ((i = 0; i < ${#USERS[@]}; i++)); do
        name=${USERS[$i]}
        password=${PASSWDS[$i]}
        
        # add user
        if id "$name" >/dev/null 2>&1; then
            echo "$name" already exists, skip user creation
        else
            useradd -m "$name"
            echo "$name:$password" | chpasswd
            echo "Created user $name"
        fi
        
        # create data dir
        for dir in "${DATA_DIRS[@]}"; do
            if [ -d "$dir/$name" ]; then
                echo "$dir/$name" already exists, change its owner and group to $name
            else
                mkdir "$dir/$name" && 
                echo "Created directory $dir/$name for $name"
            fi
            chgrp -R "$name" "$dir/$name"
            chown -R "$name:$name" "$dir/$name"
        done
        
        echo "-------------"
        
    done
else
    echo "Aborting user creation"
fi

tips: 查看所有用户的命令 cat /etc/passwd |cut -f 1,3 -d: 第三个参数:500 以上为新建用户，其它为系统用户

---

以 bash 运行下面的脚本可以批量删除指定用户

#!/bin/bash

# user names to delete
USERS=("zza" "zzb")

# Get confirmation from user before deleting
echo "Do you want to delete the following users?"
for user in ${USERS[@]}
do
    echo "$user"
done
echo "(y/n)"
read CONFIRM_DELETE

# deleting users
if [ "$CONFIRM_DELETE" == "y" ]; then
    for user in ${USERS[@]}
    do
        sudo userdel -r $user
        if [ $? -ne 0 ]
        then
            echo "delete $user failed"
        else
            echo "delete $user succeed"
        fi
    done
else
    echo "Aborting user deletion"
fi