linux test expression

[ $num -eq 1 ] && {
echo "start installing lamp."
sleep 2;
[ -x "$path/lamp.sh" ] || {
echo "$path/lamp.sh does not exist or can not be exec."
exit 1
}
$path/lamp.sh
exit $?
}

[ $num -eq 2 ] && {
echo "start install lnmp."
sleep 2;
[ -x "$path/lnmp.sh" ] || {
echo "$path/lnmp.sh does not exists or can not be exec."
exit 1
}
$path/lnmp.sh
exit $?
}

[ $num -eq 3 ] && {
echo bye
exit 10
}

[[ ! $num =~ [1-3] ]] && {
echo "The num you input must be {1|2|3}"
echo "Input wrong"

linux test expression

原文：http://blog.51cto.com/546136/2061040