df - disk space monitoring

Very simple command of df -h (h means human readable...aka GB sizes). 

df -h

Filesystem      Size  Used Avail Use% Mounted on
tmpfs           1.6G  1.8M  1.6G   1% /run
/dev/sda3       450G  220G  208G  52% /
tmpfs           7.8G     0  7.8G   0% /dev/shm
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
/dev/sda1       3.9G  6.1M  3.9G   1% /boot/efi
tmpfs           1.0M     0  1.0M   0% /mnt/nodectlsecure
tmpfs           1.6G  104K  1.6G   1% /run/user/1002

You are interested in the / (ROOT) volume.  You can see I have 208GB available which should handle my node for quite some time.  If you have disk space issues please see Stararchiver KB under the Node Operator shelf.