I have difficulties to understand the assignment 3 question 1. The absolute path name for relative path name /ucb/telnet should be the /usr/bin/ucb/telnet, since the relative path name defines a path from the current directory /usr/bin. Why is /usr/uct/telnet instead?
"Remember that the ".." directive above takes one to the parent folder of the one you are working in. We are working in /usr/bin, hence the parent folder is /usr. Then we move forward
to ucb/telnet, therefore we land in /usr/ucb/telnet."
where can I find the reference in our text book about this ".." thing?