Sometime in April 2015, LinkedIn acquired Lynda.com (a career building tools website). Following this, LinkedIn is giving its user access to Lynda.com’s tutorials for a trial period of 31, 21 and 10 days.
There are premium and free users of LinkedIn and each user has different duration to access the site. Premium LinkedIn users have access to the site for 31 days, while the free users have 21 days. However, interested non-users of LinkedIn can try out the service for a limited period of 10 days.