How to : download page and save it to /usr/src/lsws/trial.key

[enjakxx]

I have a server with directadmin. I'm newbie

How do i upload trial.key to /usr/src/lsws/ ??

Please request a trial license from litespeedtech web site download page and save it to /usr/src/lsws/trial.key

I login with admin to ftp and can not find folde : /usr/src/lsws/ ????

==========

also My website use php and mysql + mod rewrite, should i Enable PHP SuEXEC ???