请问shell标准输入的有关问题
请问:下面程序中出现的cat <<myfile
............
............
myfile
这是什么意思阿?
#!/bin/bash
loopvar=2
echo " *************"
echo " * main manu *"
echo " *************"
function main_manu()
{
cat <<myfile
DATE :`date`
*********************************************
CREATE MINISITE CHINAITLAB.COM
*********************************************
** 1) ADD MINISITE FTP ACCOUNT **
** 2) ADD DOMAIN IN CHINAITLAB.COM **
** 3) ADD DATABASE IN MYSQL **
** 4) ADD VIRTUAL HOST IN APACHE **
** 5) BACHUP MINISITE **
** 6) DELETE MINISITE **
** 7) EXIT **
*********************************************
myfile
}
while [ $loopvar -gt 0 ]
do
main_manu
echo -n " Please choose [1-7]:"
read manu_choice
case $manu_choice in
7)
exit
;;
*)
clear
continue
;;
esac
done