Free disk space related useful command in Linux

In our day to day development work with linux, we often need how much disk space is available to use. It is really useful which partition has how much space left. Following are some useful linux commands about free disk space:

How much space left in total on disk

$ df -h --total
Filesystem      Size  Used Avail Use% Mounted on
...             ...   ...   ...  ...  .....
...             ...   ...   ...  ...  .....
total           922G  275G  601G  32% -