Solution to “mount.nfs: Protocol family not supported” error

At first, the above error seems very cryptic. But the error is indeed what the error message says! You are trying to mount a directory on another system that does not support the protocol that the system you are running the mount command on supports. To figure out more details, run with verbose option enabled … More Solution to “mount.nfs: Protocol family not supported” error

passwd: Authentication token manipulation error. Here’s one of the possible fix

If you hit this error on your Linux box while trying to change your password, then I am sure you would have stumbled upon these solutions on askubuntu. If the problem still persists then the problem may be that the user who’s password you are trying to change does not have a local authentication but … More passwd: Authentication token manipulation error. Here’s one of the possible fix

How to find the difference between 2 lists in XSB Prolog?

We define the difference between two lists A and B as A-B = Elements in A but not B. SWI Prolog has a builtin predicate to do this in the form of subtract/3. It seems that XSB Prolog lacks this predicate. So, here is a simple alternate definition of subtract in XSB prolog- subtract(A,B,C):- findall(X, (member(X,A), not(member(X,B))), C). where … More How to find the difference between 2 lists in XSB Prolog?

The region controller does not know whether any boot images have been imported yet-Ubuntu MAAS error solution

After setting up the web interface for Ubuntu MAAS, I tried importing boot images into the cluster through the GUI. And the below message popped up and never went away- The region controller does not know whether any boot images have been imported yet. If this message does not disappear in 5 minutes, there may … More The region controller does not know whether any boot images have been imported yet-Ubuntu MAAS error solution