Run following commands to cache credentials

$ git config credential.helper store
$ git push https://github.com/repo.git

Username for ‘https://github.com’:
Password for ‘https://USERNAME@github.com’:

check the session path configured in app/etc/env.php

'session' => [
         'save' => 'files',
         'save_path' => '/var/php/session/',
     ],

and make sure save_path has proper permission and ownership

Run the following queries

CREATE USER 'phpcode'@'localhost' IDENTIFIED BY '#####';
GRANT ALL PRIVILEGES ON * . * TO 'pramod'@'localhost';

Make sure you have the following line added in ngin configuration

upstream fastcgi_backend {  
    server unix:/var/run/php/php7.0-fpm.sock;
}

Or

upstream fastcgi_backend {  
     server 127.0.0.1:9000;
 }

first check for current session life time

php bin/magento config:show admin/security/session_lifetime 

If there is no entry issue the following query

insert into core_config_data (config_id, scope, scope_id, path, value) values (null, 'default', 0, 'admin/security/session_lifetime', 36000);

If entry is there increase the session life time. It can be done in two ways

UPDATE core_config_data SET value = 86400 WHERE path = 'admin/security/session_lifetime';

OR

Issue the following command from magento root directory

php bin/magento config:set admin/security/session_lifetime 86400 
php bin/magento cache:clean

This should solve the problem

Issue the following command

sed -i '1,10539d' FILENAME

Run the following command

php bin/magento sampledata:deploy

test

Magento 2 is strict about the XML configuration.

The code  <remove src="css/print.css" media="print" />  in  magento2-theme-performance/Magento_Theme/layout/default_head_blocks.xml Generates this error.

If you remove the ‘media’ attribute of print.css this issue is resolved.

Following are the fields you need to set 0 or 1 in core_config_data table to minify css/js files.

dev/js/minify_files - Minify Js
dev/css/minify_files - Minify css

Network File System (NFS) is a distributed file system protocol originally developed by Sun Microsystems in 1984, allowing a user on a client computer to access files over a computer network much like local storage is accessed. NFS, like many other protocols, builds on the Open Network Computing Remote Procedure Call (ONC RPC) system. The NFS is an open standard defined in Request for Comments (RFC), allowing anyone to implement the protocol.