实现文件中批量创建用户—2

实现文件批量创建用户

创建用户文件

[root@localhost script]# cat user.txt 
user01	123456
user02	abcdef
user03	hjklmn
user04	654321
user05	opqrst

脚本案例

#!/bin/bash
#create user by file
#v1.0 itwangqiang 2020/12/28

if [ $# -eq 0 ];then
	echo "usage: `basename $0` file"
	exit
fi

if [ ! -f $1 ];then
	echo "error file"
	exit
fi

#IFS内部字段分隔符,重新定义分隔符
#IFS的两种使用方式：
#IFS=$'\n'  \n：表示回车
#单引号内直接回车
IFS='
'
#for循环是以空格或TAB健作分隔符
for line in `cat $1`
do
	user=`echo "$line" | awk '{print $1}'`
	pass=`echo "$line" | awk '{print $2}'`
	id $user &> /dev/null
	if [ $? -eq 0 ];then
		echo "user $user is exist"
	else
		useradd $user
		echo "$pass" |passwd --stdin $user &> /dev/null
	fi
done

文件出现空行

#!/bin/bash
#create user by file
#v1.0 itwangqiang 2020/12/28

if [ $# -eq 0 ];then
	echo "usage: `basename $0` file"
	exit
fi

if [ ! -f $1 ];then
	echo "error file"
	exit
fi

#IFS内部字段分隔符,重新定义分隔符
#IFS的两种使用方式：
#IFS=$'\n'  \n：表示回车
#单引号内直接回车
IFS='
'
#for循环是以空格或TAB健作分隔符
for line in `cat $1`
do
	if [ ${#line} -eq 0 ];then
		continue
	fi
	user=`echo "$line" | awk '{print $1}'`
	pass=`echo "$line" | awk '{print $2}'`
	id $user &> /dev/null
	if [ $? -eq 0 ];then
		echo "user $user is exist"
	else
		useradd $user
		echo "$pass" |passwd --stdin $user &> /dev/null
	fi
done