Unix programming?

Question

Commands don’tneedto be efficient. If your current directory is /usr/local/games/, and you were to run the command cd ./.././../local/../local/games/., what directory would youend up in? (Give the absolute file path.)

Answer 1

you need to understand what the dot and double dot mean. go back and read up, as it is VITAL!

Answer 2

A single . doesn't go anywhere, so those can be removed.  The path is equivalent to ../../local/../local

Then, "going into" a directory (the first "local/") and then going back out again with ../ does nothing, so you can remove that.   Now it's equivalent to ../../local

And since . is /usr/local/games/ to begin with, then ../../ is the same as /usr/, so the final spot you land is in /usr/local/

Answer 3

The starting directory is "/usr/local/games/" 

. <-- the current directory (/usr/local/games/) 

/.. <-- up one directory  (/usr/local/) 

/. <-- again, the current directory (now /usr/local/) 

/.. <-- up one more directory (/usr) 

/local <-- back down to local (/usr/local/) 

/.. <-- and back up on (/usr) 

local/games/ <-- puts you right back where you started.