Folks,
 
I have  always wondered at my ability to keep the myriad of LINUX instructions in my head.  What would I do if I were to start losing them?   Is there a tool to search for recall?
 
Is there any way to go backwards in LINUX command land?  If I were to remember that there is a command that will print on standard output the contents of a file in txt characters,  but could not for the life of me remember 'more'.  Where would I go for help (other than sending a email to this list serve)?  All the command dictionaries I have are alphabetic. 
 
Ken Jones (the elder)