The purpose of this plugin is to add the ability to output a list of link categories and a complete list of links with notes and descriptions.

Noted That:

To install correctly this link-library.zip.
Fisrt Download the link-library.zip to your computer
Extract/Open link-library.zip to Your Computer.
Then, Find readme.txt file inside link-library.zip and Open readme.txt.
Now, Read the Requirements of this plugin. Which Wordpress Version and PHP Version are required to run this Plugin in Your Wordpress Site.
Then, Follow the the Tips Below.

Start the Tips:

1. First Download "link-library.zip" Plugin to your Local Computer. (Click Download)

2. Then, Login to your "yourdomain.com/wp-admin" Dashboard.

3. Then, Click on "Plugins" + "Add New" from left sidemenu of Dashboard.

4. Now, Click on "Upload Plugin" button.

5. Now, Browse "link-library.zip" Downloaded plugin from your computer, Where you downloaded link-library.zip According to Step – 1 Above then, click on "Install Now"

6. Now, Click on "Active Plugin"

7. Then, See left sidemenu. "Link Library" folder is added on left sidemenu. Now, Click on "Link Library" folder.

Noted that: If you do not see "Link Library" folder on left sidemenu then, see at left sidemenu "Settings" or "Tools".

8. Now you configure yourself oR Watch video tutorial below about Link Library Configurtions and Settings or How to work "Link Library" in your WordPress site.

After Activated Plugin According to Step-6 then,

Go to "Plugins" + "Installed Plugin" from Wordpress Admin Panel Leftside Menu.
or Direct go to: https://yourdomain/wp-admin/plugins.php
Then, Find "Link Library" Activated Plugin from Plugin List.
Then, Click on "Settings" from Plugin that is Link Library
Now, Edit/Add/Config the setting and Click on "Save Changes" button,

Guide
Download the plugin Upload link-library.php to the /wp-content/plugins/ directory Activate the plugin in the WordPress Admin To get a basic Link Library list showing on one of your WordPress pages: 1. In the WordPress Admin, create a new page and type the following text, where # should be replaced by the Settings Set number: [link-library settings=#] To add a list of categories to jump to a certain point in the list, add the following text to your page: [link-library-cats settings=#] To add a search box to your Link Library list, add the following text to your page: [link-library-search] To add a form for users to be able to submit new links: [link-library-addlink settings=#] In addition to specifying a library, categories to be displayed can be specified using addition keywords. Read the FAQ for more information on this topic. Further configuration is available under the Link Library Settings panel.

Guide

Download the plugin
Upload link-library.php to the /wp-content/plugins/ directory
Activate the plugin in the WordPress Admin

To get a basic Link Library list showing on one of your WordPress pages:
1. In the WordPress Admin, create a new page and type the following text, where # should be replaced by the Settings Set number:
[link-library settings=#]

To add a list of categories to jump to a certain point in the list, add the following text to your page:
[link-library-cats settings=#]
To add a search box to your Link Library list, add the following text to your page:
[link-library-search]
To add a form for users to be able to submit new links:
[link-library-addlink settings=#]

In addition to specifying a library, categories to be displayed can be specified using addition keywords. Read the FAQ for more information on this topic.

Further configuration is available under the Link Library Settings panel.

list, complete, links, notes, descriptions, categories, link, plugin, ability, output,

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Reffered: https://wordpress.org/