linux Centos 批量创建用户测试脚本, 一次行初始化多个脚本，测试直接用的循环。其实业可以从文件中读取创建。
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#!/bin/bash
DATE=$(date +%F_%T)
USER_FILE=user.txt
echo_color(){
if [ $1 == "green" ]; then
echo -e " 33[32;40m$2 33[0m"
elif [ $1 == "red" ]; then
echo -e " 33[31;40m$2 33[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
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结果如下：
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[root@bigdata120 shell]# ./create_user.sh
./create_user.sh: line 7: user.txt exist, rename user.txt-2020-06-17_02:27:09.bak command not found
user1 User create successful.
user2 User create successful.
user3 User create successful.
user4 User create successful.
user5 User create successful.
user6 User create successful.
user7 User create successful.
user8 User create successful.
user9 User create successful.
user10 User create successful.
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