in reply to Re^8: [OT] A New Everything ?
in thread [OT] A New Everything ?

I thought the point here was that I was to log out as root and back in as fred. I get nothing that way:

root@third:~# exit
logout
Connection to 143.110.153.42 closed.
$ ssh fred@143.110.153.42
fred@143.110.153.42: Permission denied (publickey).
$

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It seems fred lacks his public key in the file ~fred/.ssh/authorized_keys. You need to upload that before blocking password logins, e.g. using ssh-copy-id, add add it to the autorhized_keys file. Once that is set up, you should be able to log in using the public key.

Is that as easy as

rm /usr/bin/su

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Yes and no. It does remove su, but you are supposed to uninstall the entire package, e.g. using apt-get remove package-name on Debian-based distributions. The package name depends on the distribution. On Ubuntu, it's in util-linux, and you really don't want to uninstall that package. Just leave su as is. It won't hurt for now.

After the useradd, I go in, and there's nothing in home. That doesn't make sense to me.

Home is supposed to be empty, or a copy of /etc/skel/. How should the operating system know what you want to put there?

Alexander

--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

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Re^10: [OT] A New Everything ?
by marto (Cardinal) on Sep 23, 2020 at 10:11 UTC

    "Home is supposed to be empty, or a copy of /etc/skel/. How should the operating system know what you want to put there?"

    Aldebaran is telling you that /home/fred does not exist.

    marto@Marto-Desktop:~$ sudo useradd fred
[sudo] password for marto: 
Sorry, try again.
[sudo] password for marto: 
marto@Marto-Desktop:~$ sudo passwd fred
New password: 
Retype new password: 
passwd: password updated successfully
marto@Marto-Desktop:~$ ls -al /home
total 12
drwxr-xr-x  3 root  root  4096 May 12 15:05 .
drwxr-xr-x 20 root  root  4096 May 12 15:04 ..
drwxr-xr-x 56 marto marto 4096 Sep 23 10:32 marto
marto@Marto-Desktop:~$ su - fred
Password: 
su: warning: cannot change directory to /home/fred: No such file or di
+rectory
$ ^C

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    As previously stated useradd was not being called with the correct arguments to create /home/fred, which would have been useradd -m fred thus creating the directory and copying the files from /etc/skel.

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      Aldebaran is telling you that /home/fred does not exist.

      You are right, I misread that part.

      Update: I misread "home" as $ENV{HOME} instead of /home, and I used "home" in my previous answer to mean $ENV{HOME}, not /home.

      Alexander

      --
      Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)
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        Aldebaran is telling you that /home/fred does not exist.

        That did throw me for my first of many "what the heck" moments. I soon created barney with the right command. I misunderstood a good handful of things in trying to get barney's ssh squared away, so I moved on to wilma. I needed to have directories and files set with proper ownership, e.g. wilma needs to own .ssh . One thing I was reading wrong was that I thought authorized_keys was a directory that contained files. Not so.

        We're getting deep down into the weeds of this thread, and I've gotten a lot of great help on a nebulus and moving target, but we get fewer eyes down here, and I don't want to punish the people who are helping me by keeping it going forever. I'm close with wilma and I think I'm gonna get over on betty. Here's my latest attempt with wilma:

        Read more... (5 kB)

        Thanks all for comments.

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