Working from the command line has some disadvantages, one of those is that you don't have a constant graphical reminder of physical and available disk space. To check this we can use the command df which stands for disk filesystem

From the command line:
df -h — (the -h means human readable format, so instead values being in bytes, they are displayed at MB or GB etc)

      $ df -h\\ 
      
      Filesystem      Size  Used Avail Use% Mounted on\\ 
      /dev/root       6.0G  3.7G  2.0G  66% /\\ 
      devtmpfs        214M     0  214M   0% /dev\\ 
      tmpfs           218M     0  218M   0% /dev/shm\\ 
      tmpfs           218M  4.5M  213M   3% /run\\ 
      tmpfs           5.0M  4.0K  5.0M   1% /run/lock\\ 
      tmpfs           218M     0  218M   0% /sys/fs/cgroup\\ 
      /dev/mmcblk0p6   63M   20M   43M  32% /boot\\ 
      tmpfs            44M     0   44M   0% /run/user/1000\\