linux系统下的一个脚本程序，演示了一个考勤的脚本程序，从文件“userinfo.dat”中获得用户的用户名和密码信息，将考勤信息写入文件“check.dat”-linux system a scr ipt, a demo scr ipt attendance procedures, from the document " userinfo.dat"　get the user' s user name and password information, attendance information will be written into the document " check.dat"