批量创建用户20个和密码

批量创建用户

第一种方法

#!/bin/bash

for i in user{1..20}
do
   ps=$(date +%N | head -c 8)
        useradd $i
        echo "$ps" | passwd --stdin $i
        echo "$i $ps" >> /tmp/c       查看密码在tmp/c
done
~      

第二种方法

#!/bin/bash

DATE=$(date +%F_%T)

USER_FILE=user.txt

echo_color(){

    if [ $1 == "green" ]; then

        echo -e "[32;40m$2[0m"

    elif [ $1 == "red" ]; then

        echo -e "[31;40m$2[0m"

    fi

}

# 如果用户文件存在并且大小大于0就备份

if [ -s $USER_FILE ]; then

    mv $USER_FILE ${USER_FILE}-${DATE}.bak

    echo_color green "$USER_FILE exist, rename ${USER_FILE}-${DATE}.bak"

fi

echo -e "User   Password" >> $USER_FILE

echo "----------------" >> $USER_FILE

for USER in user{1..10}; do

    if ! id $USER &>/dev/null; then

        PASS=$(echo $RANDOM |md5sum |cut -c 1-8)

        useradd $USER

        echo $PASS |passwd --stdin $USER &>/dev/null

        echo -e "$USER  $PASS" >> $USER_FILE

        echo "$USER User create successful."

    else

        echo_color red "$USER User already exists!"

    fi

done