Questions tagged [ubuntu-20.04]

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

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systems requirement planning [duplicate]

I am running Ubuntu server 20.04 LTS in a VM hosted on a NAS (Synology.) Primary purpose of this system is to ingest data for ELK. This is the master node. Configuration is: Compute: Intel Celeron ...
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Automated Ubuntu 20.04 server install : How can I get hostname from DHCP server?

I'm sorry but English is not my first language. For unattended classical ubuntu server installation, I populated the hostname from my DHCP server. Then I passed it by 'netcfg/get_hostname=' option of ...
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NSS-LDAP not working over TLS: do_open: do_start_tls failed:stat=-1

I'm using NSS-LDAP for authentication. Without TLS, everything works fine. Once I enable TLS (StartTLS) with a self-signed certificate, which I have added to the client, NSS-LDAP won't connect to the ...
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High memory usage on digital ocean droplet by mysql 8

I have a laravel application which I've installed on a 1GB standard droplet running ubuntu 20.4, nginx, MySQL 8 and php 7.4 The application isn't even live yet and I notice it's already using over 60% ...
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CSF failed to Start after Ubuntu 20.04 upgrade from 18.04

Today I have upgraded my Ubuntu 18.04.04 VPS server to Ubuntu 20.04. Now CSF not starting and shows the following error and not start the CSF service. *Error* The path to iptables is either not set or ...
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Keyboard on remote console on Dell iDRAC on R815 fails

I launch the Virtual Console as described on https://serverfault.com/a/1023447/45704 This works, except the keyboard does not work. In other words: I can see the console, I can move the mouse. But if ...
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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 ...
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42 views

ProFTPD - TLS - Client does not support any cipher

I am running Ubuntu Server 20.04 and proftpd 1.36 and have an issue setting up TLS. I have followed the guide in the config file, but I get a very odd error. That there is no supported cipher. And ...
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74 views

ZFS configuration for Ubuntu 20.04

TL;DR I have three 2 TB drives and one 500 GB drive in a machine running Ubuntu 20.04 with a default ZFS install on the small drive. My plan is to partition the larger drives into two partitions each, ...
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Accessing Ubuntu 20.04 from Mac OS Catalina: which client to use?

I have a clean install of Ubuntu 20.04 and have setup screen sharing. It gives me an URL to use to access the desktop, something like vnc://my-computer.local When I type this in a web browser on the ...
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restore zsys history in grub for ubuntu 20.04 (or revert to a previous state in command line)

I have installed Ubuntu 20.04 with ZFS on my Dell XPS-L702X. Is it possible with zsys to revert the machine to a previous state (I mean a complete state, of course, like the ones you can find on the ...
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NetworkManager stop working in Ubuntu Linux

Settings - Network: Oops something has gone wrong. Please contact your software vendor. NetworkManager needs to be running. ~$ NetworkManager NetworkManager: symbol lookup error: /usr/lib/x86_64-...
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how to filter dns requests with iptables

I am trying to filter the dns requests from my local network. Only authorize requests to specific dns and deny the rest, but it has not worked for me. This is my rule (with dns google example): ...
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729 views

workaround for iptables limit multiport rule

I have many ports to block, but iptables multiport rule has a restriction and only allows a maximum of 15 ports. severalports="1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16" iptables -A INPUT -p ...
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Making Nextcloud Docker accessible from local network

I installed a fully dockerized Nextcloud server on Ubuntu LTS 20.04. Right now, it is accessible via nginx from the subdomain I assigned to it, with a SSL certificate from Lets Encrypt. I would like ...
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31 views

MySQL 8.0.20 via SSH

DBeaver 7.1.0 on Windows 10 trying to connect to MySQL 8.0.20 on Ubuntu 20.04 using SSH. I also tried other Windows MySQL GUI clients, with the identical results, which leads me to believe the problem ...
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111 views

Docker settings in Ubuntu 20.04

Current setup I've installed the Docker (19.03.11) on Ubuntu (20.04) based on this article: https://docs.docker.com/engine/install/ubuntu/ What would be the goal I would like to change the data-...
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Connecting 2 servers on network with netplan

I have 2 servers in a vrack from OVH. On my dedicated server (ubuntu 18.04) I used this netplan: network: version: 2 renderer: networkd ethernets: lo: dhcp4: true eno3: ...
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Schannel connect / MS SQL Server 2014 SP 3 / Win 2008 R2 / PHP sqlsrv_connect -> TLS Error

I have updated from Ubuntu 19.10 to 20.04 and all had gone well other than the following issue, possibly caused by 20.04 requiring TLS 1.2(?). I have updated MS SQL to the latest service pack with ...
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54 views

Pool gone with upgrade to Ubuntu 20.04

I upgraded my server (SuperMicro X11-SSM-F, LSI SAS 9211-8i) from Ubuntu 18.04 to 20.04. The server had 2 zpools, one composed of a single WD Red 10 TB (downloadpool), and the other composed of 8 WD ...
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41 views

Software RAID5 missing file-system; volume group. can data be recuse?

I try to recuse my 8TB raid5 in UBUNTU20.05. Below are what I have done: root@ubuntu:~# mdadm --detail /dev/md2 /dev/md2: Version : 1.2 Creation Time : Wed May 10 20:26:39 2017 ...
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Tomcat9 in Ubuntu 20.04 timing out when under high load

What is the general steps to approach to investigate why Tomcat would be timing out connections when under high load? I run a tomcat9 server hosted in a virutal machine using Virtualbox. I recently ...
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How to change default directory for a vsftpd to a virtualhost folder?

I have configured multiple virtual hosts in Apache. I am creating users with useradd <username>. I want to assign the directory of the virtual host to a specific user in vsftpd. For example, ...
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138 views

what is the difference between sssd (realm join) and net ads join?

I have been using ubuntu 18.04 with sssd to join my servers to my active directory domain for a while now. This worked quite nicely, enabling me to ssh to the servers with AD users and create samba ...
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32 views

how to disable SSL for samhain when connecting to a mysql database?

I have just compiled samhain from source and I added database connection credentials to the samhainrc file. For some reason, samhain will not write any entries to the mysql database. The db ...
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47 views

Unable to allow SFTP but disallow SSH with Public Key Authentication

I've got an Ubuntu Server 20.04 instance running in the cloud. I've configured my accounts to use public key authentication, and will disable password authentication once everything is verified ...
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1answer
54 views

Linux change sshd_config to allow a user to use remote terminal (command line)

I can SSH and run commands as the system administrator. I also have set up some users to do "jailed" SFTP. How can I change the following sshd_config file to allow TestUser2 to do both jailed SFTP (...
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1k views

Cannot conect MySQL (error 2026) after upgrade to Ubuntu 20.04

I cannot connect to MySQL 5.7.27 running on CentOS 7 server after upgrade of my workstation to Ubuntu 20.04 LTS. I am connecting using command mysql -h <server_ip> -u <user_name> -p and ...
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37 views

postfix won't send mail via Amazon SES - Host or domain name not found

I have been trying to configure my Amazon EC2 instance (running Ubuntu 20.04) to send mail via Amazon SES. I have various settings I've borrowed from an earlier (successful) configuration to prevent ...
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27 views

Can write to all smb shares except root of mounted USB drive

I have a USB drive mounted to /media/usbdrive on my Ubuntu 20.04 box. I can write files to any share except the root share. Meaning, I have these shares set up in smb.conf: [usb] path = /media/...
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Ubuntu 20.04 Live server

How can I install Ubuntu 20.04 with only 1 partition mounted on '/' . Live CD always creates 1st partition as boot grub . Or is it possible to use kickstart for LiveCD to create only 1 parittion ?
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274 views

Boot issue on clean Ubuntu Server 20.04 system

I have recently installed Ubuntu 20.04 on a hdd in my 2009 Mac pro 4,1 (flashed to 5,1). I've wiped and reinstalled 3 times at this point. All three times, The installation goes without a hitch but ...
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2k views

Ubuntu 20.04 minimal: “Unable to locate package python-pip”

Launching some small VMs in GCP and thought I would give Ubuntu 20.04 LTS minimal a try. After doing an "apt update; apt upgrade" I'm able to install packages like Apache, but having zero luck with ...
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192 views

Ubuntu 20.04 container failing to startup in Proxmox

Hello I have created a Ubuntu 20.04 and 18.04 container in Proxmox and both return the same error when I try to start them up after creating the container via the Proxmox GUI. They fail to start and ...
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148 views

SR-IOV not working on Ubuntu 20.04 (hyper-v), works fine on 18.04 LTS

I'm running Ubuntu server virtual machines on a Windows Server 2019 system using Hyper-V. The system is equipped with an Intel I350 network adapter. (The Ubuntu VM's recognize it as "Ethernet ...
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75 views

Configuring an Ubuntu 20.04 server

this is the first time I am setting up an Ubuntu server. It is going to run a low-usage app for a company but I want to make sure not to leave any security issues out. 1) I installed a fresh Ubuntu ...
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1k views

Ubuntu 20.04 ssh-keygen unknown option -G unable to generate Diffie-Hellman parameters

I have noticed that the ssh-keygen for ubuntu 20.04 is missing the options for generating the Diffie-Hellman parameters. This is normally part of SSH hardening. Does anyone know why it has ...
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1answer
38 views

Deploy Rails app to Ubuntu 18.04 or 20.04?

I have an existing Rails app that's been sitting on an old Ubuntu 14.04 server on AWS, and I've recently moved the staging environment over to a new AWS EC2 instance running Ubuntu 18.04. I'm not a ...
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161 views

can't connect to remote mysql 5.6 server from local mysql 8.0 client. SSL protocol not supported [closed]

Here's my error: ERROR 2026 (HY000): SSL connection error: ssl_choose_client_version:unsupported protocol I recently began playing with Ubuntu 20.04 and everytime I try to log into a remote 5.6 ...
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75 views

Ansible conditional command not working on AWS server that runs ubuntu 20.04

I have a number of ansible scripts that execute commands on ubuntu servers on AWS. One particular script needs to run both on ubuntu and on Amazon Linux instances. I have a conditional command to ...
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35 views

zfs not using full disk I/O

I have setup zfs on a fresh Ubuntu 20.04. But speed seems awfully slow. The disks can deliver 140 MB/s if run in parallel: $ parallel -j0 dd if={} of=/dev/null bs=1M count=1000 ::: /dev/disk/by-id/...
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217 views

Is it possible to use software RAID inside a Docker container?

Before anyone asks why you'd want to do that, I'm using molecule to test my "infrastructure as code" locally before deploying it to actual machines. Start by creating two block devices: # dd if=/dev/...