If the plugin you have downloaded is zipped, unzip the file and upload the folder into your wp-content/plugins folder in the WordPress installation. It should appear in the admin for you to activate.
Since your questions are quite vast and not completely WordPress related, I will stick to your main question. The answer is: Yes. As long as you have it in different directories and don’t use the same prefix for their database tables or have a separate database for each (which means you can stuff more than … Read more
Changing themes on locally hosted webpages
How to display the date a directory folder on ftp was modified
Generally speaking, on a local development environment I wouldn’t rely on FTP as an update solution. Fortunately your issue isn’t specific to XAMPP or Apache, but rather a question of server permissions in general. This is good news because it means the following WordPress documentation for Automatic Updates may contain some useful information for you. … Read more
My Webhoster has enabled mod_pagespeed by default. I had to turn this off via entering ModPagespeed off in my .htaccess file. Abhik also pointed to this in his comment.
It should be related to folder permissions check the codex here it shows how to set directory permissions: https://codex.wordpress.org/Changing_File_Permissions
Well once again I posted too soon and figured out the solution shortly after. What worked for me was adding this to my wp-config.php file: define(‘FS_METHOD’, ‘ftpsockets’); The above line tries to force WordPress to use the PHP Sockets class when working with the filesystem – updating, installing etc. For security concerns on shared hosting … Read more
May be this is the same problem : Can’t upload media, permissions are correct. At first, change permission (chmod) with filezilla or another ftp client to 755.
You need to set the permissions locally in a UNIX environment: sudo chown -R www-data:www-data /usr/share/wordpress Also perhaps: chown -R nobody:nobody /path/to/wordpress Also try setting the FTP creds in the wp-config.php file: define( ‘FTP_USER’, ‘username’ ); define( ‘FTP_PASS’, ‘password’ ); define( ‘FTP_HOST’, ‘ftp.example.org:21’ ); Use “admin” or “root” for user and leave the password blank.