CodeIgniter issues - .htaccess

Question

1) I wanted to get rid of the bootstrap (index.php) name in the URL. I've been in YouTube searching and downloading lots of videos related to this, but none of them worked. This is the .htaccess file:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_URI} ^system.*
RewriteRule ^(.*)$ /index.php?/$1 [L]
RewriteCond %{REQUEST_URI} ^application.*
RewriteRule ^(.*)$ /index.php?/$1 [L]
RewriteCond %{REQUEST_FILENAME} !=f
RewriteCond %{REQUEST_FILENAME} !=d
RewriteRule ^(.*)$ /index.php?/$1 [L]
</IfModule>
I tried everything I could get on the Internet.
2) I couldn't load the files in the public folder where I store my JavaScript, CSS and image files. Path: codeigniter/application/.
What I tried:
<link rel="stylesheet" href="<?=base_URL() ?>public/css/default.css />
And the same for JavaScript files.
3) Routing problems(confusion). My default route us the dashboard controller. But I also wanted to create a login route. So I did this:
$route['login'] = 'login';
But this still routes to the default route when I go to localhost/codeigniter/index.php/login.

Answer 1

Try these .htaccess
# -FrontPage-
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L,QSA]
and
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
#RewriteRule .* index.php/$0 [PT,L]
RewriteRule ^(.*)$ index.php/$1 [L,QSA]

Answer 2

Use this code in .htaccess file and also remove index.php from your config.php file e.g. $config['index_page'] = '';
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L,QSA]