shell脚本批量添加用户

zhangsan
lisi
wanger
zhaowu

while read username
do
     # 添加用户
    useradd $username
    # 修改密码
    echo $username"123" | passwd --stdin $username
done < username.txt

for username in $(more username.txt)
do
     # 添加用户
    useradd $username
    echo $username"123" | passwd --stdin $username       
done 

 zhangsan:x:1003:1003::/home/zhangsan:/bin/bash 
 lisi:x:1004:1004::/home/lisi:/bin/bash 
 wanger:x:1005:1005::/home/wanger:/bin/bash 
 zhaowu:x:1006:1006::/home/zhaowu:/bin/bash

newusers users.txt

zhangsan:zhangsan123 
lisi:lisi123 
wanger:wanger123 
zhaowu:zhaowu123

chpasswd  < user_passwd.txt