(no subject)

Back in the day, AIX had a neat command: 'learn'. You'd type it in, and it would take you through a reasonably well-structured process of exercises to get acquainted with the unix commandline. Does anyone else remember this? Does anyone know if it got ported to any other systems? It's difficult to search for because there are so many hits for learning unix that aren't it. I do get hits on manpages for AIX: https://www.ibm.com/support/knowledgecenter/en/ssw_aix_71/com.ibm.aix.cmds3/learn.htm but none about if it was ever available as a separate package or ported to other flavors of unix.