Type pwd at the unix prompt to find out where you are in the directory tree.
Type ls at the prompt for a list of subdirectories of your current directory. For more information about these directories, try ls -al
Type cd new_directory to change to a sub directory or cd .. to go up a level to the parent directory
Type mkdir new_directory_name to create a subdirectory of your current directory.
Type cp file_name destination to copy a file to the destination directory. A * in place of a file name will copy all files in the specified directory and a . indicates the current directory. Example cp -R ./samples /home/usr_name/cadence would copy all of the cadence setup files and libraries into a directory called samples of the cadence subdirectory of usr_name