My domain name is followed by index.php ,when I open any webpage

I'm developing website using wordpress, running on Ec2 instence. My issue is index.php is followed by all my pages.

so if my page is xyz and I open it, it will open as abc.com/index.php/xyz/ , while it should open as abc.com/xyz/

I have not used any permalink. I tried to change and remove index.php from perma link .It will stop working. All my files are in root directory. PLEASE solve my issue.

How can I get it to work directly as abc.com/xyz/ ?