I bought a VPS server, and I want to run terminal commands from the file /var/www/html/command.php. I want to run this command:

cd /A_DIR


bash start.sh

I tried this in command.php:

<form action="" method="POST">
<input type="submit" name="run" id="id" value="run" />
     exec('cd /A_DIR');
     exec('bash start.sh');

But it doesn't work. I'm new to VPS server hosting :( I don't know how to set permissions for server's users.

user: root
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put on hold as off-topic by George Udosen, dessert, Thomas, Tom Brossman, vanadium Jan 14 at 11:52

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I suspect that each exec is a new shell so the cd doesn't "stick". Try a single exec instead:

 exec('cd /A_DIR; bash start.sh');

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