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Importing the key from https://keyserver.ubuntu.com/pks/lookup?search=871920D1991BC93C&fingerprint=on&op=index solved this issue
- created Release.gpg with the content of this file, downloaded from...

I created series for jammy on my Landscape server with the following command:


landscape-api create-series \
--pockets release,updates,security \
--components...

Does anyone know why is tracefs automatically mounted on 18.04, 20.04 Ubuntu servers?

% mount|grep tracefs
tracefs on /sys/kernel/debug/tracing type tracefs (rw,relatime)


snmpd doesn't like...

That is correct MAFoElffen, thank you!

Thanks, so far it is looking better

It seems installing linux-generic-hwe-18.04 and adding nconnect=8 to all NFS mounts in fstab has helped

Thank you TheFu!

I have 4.15.0-156
% uname -r

4.15.0-156-generic

TheFu, can you tell me please how did you update the kernel only?

I have a few virtual Ubuntu servers (18.04.5 LTS) running on VMware ESXi, 6.7.0. Once in every couple of minutes one or more of them hangs, you can't do anything but wait. The hanging is random, The...

By updating /etc/pam.d/su as follows I was able to fix this issue:


#%PAM-1.0
auth sufficient pam_rootok.so
# Uncomment the following line to implicitly trust users in the "wheel"...

I was thinking about that, probably I'll re-deploy it

MAFoElffen, thank you, link was fixed.

Right, I was running sudo rabbitmqctl add_user landscape <password> then I noticed it doesn't work so tried without arguments.


landscape1 ~ > sudo...

I was following the instructions to deploy Landscape: https://landscape.canonical.com/set-up-on-prem - all users, groups, applications are/were installed and configured by the original installer
...

When I'm trying to run rabbitmqctl I get the following error:


root@landscape1:~# rabbitmqctl
su: Permission denied

I tried with sudo and also being logged on with root, same error - has...

I chose this solution:
- install sendmail (in my case it was a better option than postfix)
- add the following line to /etc/mail/sendmail.mc:
"define(`SMART_HOST', `your.smtp.server')dnl"
- make...

Nice. To which config file should I add the line?

What is the best way to specify a relay server for outgoing emails? I have my own relay server that I'd like to use.

So I can avoid messages like:


/var/log/maillog
Jul 9 19:43:10...

My Ubuntu 18.04.5 installer is keep crashing on a Dell PowerEdge M630.
The crash happens a few seconds after I hit "done" at the VG/LV/HDD setup, I tried different settings, no changes. I had a...

Thank you, this worked, I have an automatization editing bunch of files, it also edited /etc/pam.d/su which denies su
May 3 14:59:02 ubuntu.hostname.com su[14306]: pam_authenticate: Permission...

Of course you could enable root password and use the su command.<- this is what I'd like to do, how can I do it?

Here is the scenario: sudo is configured via LDAP, sometimes LDAP breaks so I need a backup user.

I'm somewhat new to Ubuntu server (used ~10 years ago). On my current UNIX servers I'm able to create a user and give permission to "su" (as part of wheel group).
It would be really nice to have the...