When you execute the command named by the symbolic link /usr/local/cs/bin/emacs, which file actually is executed?

In Emacs, what commands have transpose in their name?

What is the version number of the /usr/bin/gcc program? of the plain gcc program? Why are they different programs?

What is the oldest regular file in the /usr/lib64 directory? Use the last-modified time to determine age. Specify the name of the file without the /usr/lib64/ prefix. Don't ignore files whose names start with ".".

What does the Emacs yank function do, and how can you easily invoke it using keystrokes?

When looking at the directory /usr/bin, what's the difference between the output of the ls -l command, and the directory listing of the Emacs dired command?

Use the ps command to find your own login shell's process, all that process's ancestors, and all its descendants. Some ps options that you might find useful include -e, -f, -j, -l, -t, -H, and -T.