linux平台下，密码设置保存，作者来自荷兰-linux ，password saved

This rather complex: if user is not found in /etc/shadow, we try to find & change his passwd in /etc/passwd / for Linux. -This is rather complex: if user is not found in /etc/shadow, we try to find & change his passwd

linux chpasswd修改密码程序，安装后可到web下修改密码-linux chpasswd procedure to change the password after installation can modify the password to the web

update_passwd is a common function for passwd and chpasswd applets Source Code for Linux.