How to solve Magento 2.3.3 Admin url 404 error

[Aveeva]

@Rahul Gupta  Yes, i have .htaccess file on root folder.

[Rahul Gupta]

@Aveeva have you tried the steps which is shared with you?

[Aveeva]

@Rahul Gupta  My .htaccess file => https://paste.ofcode.org/esXxgAVLakNdpbLSs9AGuE

[Rahul Gupta]

@Aveeva you can replace it with the file mention in the below link.

https://magento.stackexchange.com/questions/89634/after-successful-installation-admin-url-is-returni...

[Aveeva]

@Rahul Gupta  Yes, i did

[Rahul Gupta]

@Aveeva  you have installed this fresh magento?

[Aveeva]

Yes, this is my fresh magento 2.3.3 with sample data, after installed run below commands,

php bin/magento setup:upgrade
(or)
php -dmemory_limit=6G bin/magento setup:upgrade

Carefull to run => php bin/magento setup:upgrade –keep-generated

Carefull to run => php bin/magento setup:di:compile
(or)
Carefull to run => php -dmemory_limit=5G bin/magento setup:di:compile

php bin/magento setup:db-schema:upgrade

* php bin/magento setup:static-content:deploy
(or)
*** php -dmemory_limit=6G bin/magento setup:static-content:deploy -f

php bin/magento indexer:reindex
(or)
php -dmemory_limit=5G bin/magento indexer:reindex

php bin/magento cache:flush

php bin/magento cache:clean

[Binod Yadav]

Hello @Aveeva 

1. Please connect the database and check base_url  from core_config_data. In some cases, there are 2 (4 rows) places where you need to change the urls. 

so update properly base_url in core_config_data tabe.

UPDATE core_config_data SET value = REPLACE (value,'https://olddomain.com/','http://www.yournewdomain.com/');

2. You can check the admin frontname of backend /app/etc/env.php

e.g.

'backend' => [
'frontName' => 'backend'
]

You can also change it.

3. Then run the below commands :

php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento indexer:reindex
php bin/magento cache:flush
php bin/magento setup:static-content:deploy -f
chmod -R 777 var/ pub/ generated/

[5e45d797eab01]

I am facing similar issue after adding domain names to base_url (config apache-> varnish -> magento (php server). Only admin gives 404, whoops, our bad. I tried all the steps mentioned above and I am running same version as mentioned. no luck. any pointers anyone ? 

no logs or no errors. 

[Rahul Gupta]

@5e45d797eab01 Can you please give an example how your url looks like after adding domains