First, when dealing with the spaces in a file name while using the terminal, you can use a back-slash before the space.
File name with spaces.txt
For the terminal:
File\ name\ with\ spaces.txt
Sometimes we run across a downloaded file online that was created by utilizing the winrar multiple-file feature to make a huge file downloadable. A good example would be an ISO image that is more than 1GB in size. The rar program can break up the file into smaller pieces. Example:
bigiso.part01.rar bigiso.part02.rar bigiso.part03.rar bigiso.part04.rar and so on
To unrar multiple files into one, first install the unrar program in linux. In this case, I’m assuming you are using Ubuntu or any Debian-based distribution (like Raspbian):
sudo apt install unrar-free sudo apt install unrar
Then use the unrar command to unrar. Remember to use the \ before any spaces.
unrar x -e bigiso.part01.rar
This should build the large file back up into its uncompressed state.