The process of installing WordPress plugins on a Linux server is not complicated. You can install it in several different ways. Here are some common installation methods.

　　Prerequisites

　　The Linux server has WordPress installed and can be accessed through a browser.

　　You have access to the server (via SSH connection, etc.).

　　PHP, MySQL, and Apache/Nginx are correctly configured.

　　Method 1: Install plugins through the WordPress admin backend

　　This is the easiest way to install WordPress plugins without directly operating server files.

　　1. Enter the WordPress backend

　　Access your WordPress website in a browser (for example: http://yourdomain.com/wp-admin) and log in with an administrator account.

　　2. Enter the plugin management page

　　In the WordPress backend, click Plugins in the left menu, and then select Install Plugin.

　　3. Search for plugins

　　On the Install Plugin page, you can find the plugin you need through the search box. Enter the plugin name or related keywords.

　　4. Install the plugin

　　After finding the plugin, click Install Now and wait for the plugin to install.

　　5. Enable the plugin

　　After the installation is complete, click Enable and the plugin will take effect, usually adding the corresponding settings page or function.

　　Method 2: Install by uploading the plugin

　　If you have downloaded a plugin file in .zip format, you can upload and install the plugin through the backend.

　　1. Go to the plugin management page

　　As with method 1. go to Plugins > Install Plugins in the WordPress backend.

　　2. Click Upload Plugin

　　On the Install Plugin page, click the Upload Plugin button at the top.

　　3. Upload the plugin file

　　Select the local plugin .zip file and click Install Now.

　　4. Enable the plugin

　　After the installation is complete, click Enable to activate the plugin.

　　Method 3: Manually install the plugin via SSH or FTP

　　If you prefer to use the command line or need to handle large-scale plugin installations, you can connect to the server directly via SSH or manually upload the plugin using an FTP client.

　　1. Connect to the server

　　Log in to your Linux server via SSH:

　　ssh user@your-server-ip

　　2. Download the plugin file

　　If you have the plugin's .zip file, you can download the plugin directly via wget or curl. For example, let's say you downloaded the Yoast SEO plugin:

　　cd /var/www/html/wp-content/plugins

　　wget https://downloads.wordpress.org/plugin/wordpress-seo.latest-stable.zip

　　3. Unzip the plugin file

　　Once the download is complete, unzip the .zip file:

　　unzip wordpress-seo.latest-stable.zip

　　4. Modify plugin file permissions

　　Make sure the plugin file permissions are correct so that the web server (usually www-data) can access it:

　　sudo chown -R www-data:www-data /var/www/html/wp-content/plugins/wordpress-seo

　　5. Enable the plugin

　　Once the file is uploaded, go to the WordPress backend and go to the Plugins page. You should see the newly uploaded plugin. Click Enable.

　　Method 4: Install plugins using WP-CLI

　　WP-CLI is a command-line tool for WordPress that allows you to quickly install and activate plugins through the command line, and even manage multiple plugins in batches.

　　1. Install WP-CLI

　　If WP-CLI is not installed on your server, you can install it with the following command:

　　curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar

　　chmod +x wp-cli.phar

　　sudo mv wp-cli.phar /usr/local/bin/wp

　　Verify that the installation was successful:

　　wp --info

　　2. Install plugins through WP-CLI

　　Use the following command in the root directory of WordPress to install the plugin. For example, install the Yoast SEO plugin:

　　cd /var/www/html

　　wp plugin install wordpress-seo --activate

　　This will automatically download and activate the plugin.

　　3. Check plugin status

　　You can also check whether the plugin has been successfully installed and enabled through WP-CLI:

　　wp plugin list

　　There are many ways to install WordPress plugins: directly through the backend, upload the plugin, and use the command line (SSH or WP-CLI). These methods have their own advantages and disadvantages, and you can choose the appropriate method according to your actual needs. The most common way is to manage through the WordPress backend because it is simple and intuitive, but if you need to manually install or batch manage plugins, using SSH or WP-CLI may be more efficient.