Problem: After running a command on remote server some time you need to close your terminal or pc or the command takes too much time to process and you cant wait for completion.
for such problems you would want to run the command in background to do so we have nohup.
From Man page it says
nohup - run a command immune to hangups, with output to a non-tty
You use nohup
nohup command-name &
Please note & it is required to run the command in background. Example
nohup tar -cvz file.tar.gz folder1 folder2 &
The above command will compress the folders in background and even if you close your local terminal the process will run in background.