首先看实例代码：

#/bin/bashcaldate -uecho "Hello,welcome ${LOGNAME}！A full day has begun!"read -p "input your pass word!" pwdif test $pwd == "123"then echo "Your login sucessfully!" for file in /tmp/* do echo $file doneelse echo "Deny logon"fi

cal 打印日历

date -u 显示或设置全球时间(格林威治时间)

${LOGNAME}当前登录用户

以上实例非常简单，大家可以尝试测试下，感谢大家的学习和对的支持。