cp ~aca319/source/test.c .
Copies the test.c file from the units directory to your current working directory (cwd)
cp ~aca319/doc/Lab1.pdf ~/aca319/
Copies the lab manual to a directory aca319 in your home directory
[removes the test.bak from cwd]
removes everything from cwd ... use with caution
mv test.c test.bak
renames test.c into test.bak
Shows the listing of all the C files in the current directory.
creates a subdirectory aca319, goes into it and goes out
gcc -o test test.c
compiles test.c and makes an executable test BE AWARE: test is also a unix command so to execute the one you have created you will have to use ./test (generally to execute the programs from your current working directory you will have to use ./file where ./ just means current directory)
display the manual page for the man utility
nedit test.c &
Opens editing session for test.c as a separate process, so that you can still use your Unix shell.
For more info use man, surf the web, or get a unix book.