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Questions tagged [ubuntu-20.04]

Ubuntu 20.04, named "Focal Fossa" is a Long Term Support release of Ubuntu Linux (released on April 23rd, 2020). Note that http://askubuntu.com is specifically dedicated to Ubuntu questions.

Ubuntu 20.04 - named "Focal Fossa" - is a Long Term Support (LTS) release of Ubuntu Linux. Officially released on April 23rd, 2020, it will be supported for 5 years for Ubuntu Desktop, Ubuntu Server, Ubuntu Cloud, and Ubuntu Core. Only use this tag if your question is version-specific. Note that the Ask Ubuntu site is specifically dedicated to Ubuntu questions.

371 questions
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PHP scripts suddenly load very slow on Apache

I am testing why sometimes my PHP scripts takes long to load over network (>30sec) on my Apache 2.4 Ubuntu server with PHP-FPM 7.4 using mpm_event. The server was working normally in the past few months, this started happening a few days ago and I…
c0dehunter
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Make NFS server listen only on a specific interface

I am trying to run a NFS server (nfs-kernel-server package) on a Ubuntu 20.04 machine and want to make it only acessible via VPN. I have set the appropriate IP address in the /etc/exports file and my firewall. Nevertheless, the rpc.mountd daemon is…
mat
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Influxdb is restarting constantly since my last reboot

Since my last reboot, I am seeing the following every 1-2 minutes: Aug 02 13:53:00 monitor systemd[1]: influxdb.service: start operation timed out. Terminating. Aug 02 13:53:00 monitor systemd[1]: influxdb.service: Failed with result 'timeout'. Aug…
SlyOne
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unattended-upgrades conffile prompt

To enable unattended-upgrades for packages which can show dpkg config change menu, one has to configure apt and dpkg with these config options: Dpkg::Options { "--force-confdef"; "--force-confold"; }; These options should be added to a config…
shodanshok
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iptables kernel module missing after upgrade from Ubuntu 18.04 -> 20.04

After a release upgrade from Ubuntu 18.04 to 20.04 (focal), the iptables kernel module is missing: root@server:~# iptables -L modprobe: FATAL: Module ip_tables not found in directory /lib/modules/5.4.0-42-generic iptables v1.8.4 (legacy): can't…
fzeidler
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Deny URL Access with Odoo's (Web App) 404 Error Template using Nginx as Webserver

Objective I want to block the database access URLs, like https://example.com/web/database/selector or https://example.com/web/database/manager, in an Odoo deployment for all outside traffic but a couple of specific IPs. To avoid encouraging people…
Alejandro Vidaurre
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ZFS and SAN: issue with data scrubbing

Working as scientists in a corporate environment, we are provided with storage resources from a SAN within an Ubuntu 20.04 virtual machine (Proxmox). The SAN controller is passed directly to the VM (PCIe passthrough). The SAN itself uses hardware…
Benoit
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MariaDB using much more memory than it should

We are using MariaDB 10.3.32 on a Ubuntu 20.04.4 machine with 6 GB of memory, about 20 applications running on it. Databases are all InnoDB. Even with mostly default settings (see on the bottom), memory usage increases from day to day, seemingly…
rofire
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Best practice for unattended upgrades on immutable servers

I use packer to build immutable Ubuntu 20.04 servers. How can it work smoothly with unattended upgrades? Since the image is not bundled like it was in the past the updates do not apply to new instances. It means that when a server comes up…
Niro
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Why can I change the the reserved blocks on a read only mounted ext4 filesystem?

I would have expected an error, sorry FS is read-only, but it is possible. This is unexpected & counter intuitive is there a reason? Linux files 5.11.0-27-generic #29~20.04.1-Ubuntu SMP Wed Aug 11 15:58:17 UTC 2021 x86_64 x86_64 x86_64…
lithium7
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How to set up fail2ban with UFW on Ubuntu 20.04?

I'm trying to block IP addresses with fail2ban and ufw with the following configuration and the default ufw.conf in /etc/fail2ban/action.d. Jail config [app-custom] enabled = true maxretry = 1 journalmatch = backend = polling logpath =…
Yohan W. Dunon
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Fresh Ubuntu 20 server getting wrong DHCP address

I need to setup a new Linux server on VirtualBox, I'm using Ubuntu Server 20.04 LTS and in Virtualbox my network adapter is set to bridge adapter with promiscuous mode on "allow all" First of all I permanently disabled IPV6 using this tutorial The…
Chico3001
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how to triage linux disk IO system-wide "hang"

I have a box that is periodically "going out to lunch". Symptoms are anything requiring actual disk IO hang for 30+ seconds, and it appears anything already paged in is unaffected. The problem occurs intermittently, up to a few times an hour),…
some bits flipped
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Installing Jenkins on Ubuntu tells me "Package 'jenkins' has no installation candidate"

I need to install Jenkins on Ubuntu 20.4.1. I've completed the following: apt-get -y install openjdk-8-jdk (it's Java 14.0.1) wget -q -O - http://pkg.jenkins-ci.org/debian-stable/jenkins-ci.org.key | apt-key add - (responds "OK") sudo sh -c 'echo…
Edward Tanguay
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Connecting to remote console on Dell iDRAC on R815 fails

The iDRAC's virtual console uses jnlp. I have installed: sudo apt-get install icedtea-netx Connecting to the iDRAC's webserver works using Firefox. When I click 'Launch Virtual Console' it starts the java app. The JVM then asks for a few…
Ole Tange
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