I ran the pwck command in an Ubuntu 16.04 64 bit VM. The output was that the directories for many users do not exist:

I see that there are many users without a directory, and most of them look like system users. I get why /nonexistent doesn't exist, but what about the others? Should I be adding them?

1 Answer

Each of these userids is used for owning server processes, and NEVER logs in interactively. Therefore, no need for a $HOME directory. You'll also notice that these userids have strange shells, like /bin/false. Read man 5 passwd

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