Linux utility to know command for a particular task

In my initial days of using linux I usually had to search google to know the command for doing a particular task. Once I have the command name, i can view its usage using `man command-name`. Similarly I was thinking of some utility which can tell the command to do a particular task if the task to be done is specified as an argument and opens the man page for that command e.g: ``` findUtilty "find all files in a directory" output: ls find ``` I want to know if some utility of that kind exists, if so it will be very handy especially for newbies. If not then i may like to implement it. thanx,