go to wordpress directory via ssh and modify wp-config.php including 2 new string on bottom of file
define('WP_HOME','http://example.com');
define('WP_SITEURL','http://example.com');
enter on mysql query by this command on ssh
mysql -u 'dbuser' -p 'dbname'
enter password 'dbuser'
now on mysql> type this command to find the actually location of suteurl and home url
SELECT * FROM wp_options WHERE option_name = 'home';
SELECT * FROM wp_options WHERE option_name = 'siteurl';
modify this url by typing the following command:
UPDATE wp_options SET option_value="http://example.com" WHERE option_name = "home";
UPDATE wp_options SET option_value="http://example.com" WHERE option_name = "siteurl";
exit from mysql and reboot server
