How to Change Default Permalink to Custom Structure

mod_rewrite must be enabled in your server for custom structure aka pretty permalinks to work
https://codex.www.ads-software.com/Using_Permalinks

My Server not enabled to do rewrite modules should be installed separately,So i not know how to do? you know some good plugins for use with change default permalink ?

I would recommend moving to a better webhost. Having said that, if moving is not possible for you at this time, then look again in the page link I gave you, near middle of page you’ll find https://codex.www.ads-software.com/Using_Permalinks#Permalinks_without_mod_rewrite

If you have no access to your httpd.conf file and cannot generate your .htaccess file, you’d have to go to adding index.php to your custom structure – not that good nor good-looking

To use pathinfo permalinks put index.php/ at the start of your custom permalink structure:
/index.php/%postname%/

I use new version of wordpress and i still use Default permalink for my https://www.cortestravel.com web site but when i try to change for Custom Structure /%category%/%postname%/ all my post page it loose not show up at all,I have to switch to Default permalink again then work.I still want to change permalink anyone can help me please,Or you know for good plugins for can do that will be easy for me.Thank you

I had same problems with https://yeahiloveit.com
But I have a friend and he helped me.
I was more than happy!