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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.

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Ubuntu 20.04 - How to find out how memory is used

I have an Ubuntu server I use to run a web application through Docker. The image below shows the memory consumption (top—o %MEM) of the server with NO DOCKER CONTAINERS RUNNING. So, besides the memory ...
Sig's user avatar
  • 151
1 vote
1 answer
98 views

Upgraded from 18.04 to Ubuntu 20.04 - microk8s local DNS resolution stopped working

I have a server that started out on Ubuntu 16.04. I'm trying to get it current so I did an upgrade from 16.04 to 18.04 (Which was mostly trouble free) I let that run for a day to make sure everything ...
irwinr's user avatar
  • 21
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1 answer
326 views

Supervisor ubuntu 20 error: Cannot open an HTTP server: socket.error reported errno.EADDRNOTAVAIL (99)

I am trying to run supervisor as following: azure@G01:~$ sudo supervisord -c /etc/supervisor/supervisord.conf I tried to trouble shoot as mucg as I could with no results. I do not know what the issue ...
Dev Dev's user avatar
  • 31
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1 answer
59 views

Apache2 restart does't implement PHP changes, server reboot does though

on my Ubuntu 20.04.6 LTS server with Apache/2.4.41 I needed to change post_max_size and upload_max_filesize for my new PHP 8.3.4 installation I added phpinfo(); in a file called phpinfo.php I got the ...
Curious User's user avatar
-1 votes
1 answer
251 views

How can I get SSH to work?

My pc is running Lubuntu 20.04. I am trying to ssh to a raspberry pi 4 running Ubuntu Server 22.04. I have followed the setup instructions but see the following: ssh -v [email protected] OpenSSH_8....
user1759557's user avatar
0 votes
1 answer
13k views

curl: (28) Failed to connect to X.X.X.X port 80: Connection timed out

I'm getting this error: curl: (28) Failed to connect to X.X.X.X port 80: Connection timed out When I run this: curl X.X.X.X I'm curling a specific IP address and it fails on both port 80 and 443. I ...
ShadowAccount's user avatar
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0 answers
24 views

Set Default Policy for all of user on kerberos ubuntu

I am confused when creating a password policy in kerberos ubuntu, what I don't know is how to make the policy that we have created become the default and how to make the policy apply to users that we ...
kyors's user avatar
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0 answers
81 views

MariaDB 10.3 vs 10.4 performance degradation

We're migrating to a new server and noticed some weird performance degradations. Old server is Ubuntu 18.04 running MariaDB 10.3 (10.3.27-MariaDB-1:10.3.27+maria~bionic-log); new is Ubuntu 20.04 ...
V1pr's user avatar
  • 5
0 votes
1 answer
282 views

opendkim not singing my outgoing emails ubuntu 20.04

i'm following this tutorial to integrate opendkim and sign my emails,i'm not much in ubuntu but i configured everything as the tutorial but the emails is sent without dkim signing I'm hitting the wall ...
Amir Eix's user avatar
0 votes
2 answers
336 views

Ubuntu 20.04 server ignores incoming postfix connections on IPv4, accepts IPv6

I've hacked my server to bits and now I need help. Everything was working, but I think these issues started when I tried to add a VPN server to this server to test some items at work. That process ...
Pants's user avatar
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2 answers
142 views

Is it safe to expose monitd http server to the world

I'd like to use monitd for monitoring my webserver. I read it has built in http server. By default it is set to run on 2812 port. Is safe to open the port on firewall and view it via a browser?
Łukasz Korona's user avatar
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0 answers
178 views

Unable to cURL into redis

I'm getting a connection refused error on port 9443. redis-server is definitely running, version 7.2.4. I'm not finding any other configuration I need to be setting up. It's not using the docker image....
Fibericon's user avatar
  • 105
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0 answers
48 views

Cannot start mysql anymore after fsck because of Apparmor permission and winbindd

We are on Ubuntu 20.04 and had several restarts and ran fsck. Now mysqld refuses to start: Jan 16 12:40:01 example audit[1427]: AVC apparmor="DENIED" operation="connect" profile=&...
Alex's user avatar
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0 answers
299 views

Can not connect to mssql server on Ubuntu using AD user account

I have installed a mssql-server (15.0.4335.1-6) on Ubuntu 20.04.6 LTS, following Microsoft Documentation Mssql-server is up and running and I can connect using the sa account. What I want to do, is to ...
cladmin's user avatar
1 vote
1 answer
586 views

Can't reach public IP or domain name of my server from within

Say I have a domain name "my.domain.com" with an A Record that resolves to the public IPv4 address (say 160.200.200.21) of my server (running Ubuntu 20.04) I've installed BigBlueButton on ...
Xsmael's user avatar
  • 185
0 votes
1 answer
939 views

how does one "select a boot disk" in ubuntu 20.04 install

I have a volume group consisting of 4 x 1TB disks. I have created LVs for /, /var/ and /boot all formatted ext4. On other machines I have done installs on simply mounting /boot seems to be all that ...
Russell Fulton's user avatar
0 votes
1 answer
6k views

How to enable IPv6 on Ubuntu 20.04

I'm trying to enable IPv6 support on ubuntu 20.04 with no success most resources i find online involve adding the following lines to /etc/sysctl.conf net.ipv6.conf.all.disable_ipv6 = 0 net.ipv6.conf....
Xsmael's user avatar
  • 185
1 vote
0 answers
140 views

Retrieving IPV6 address of connections on Apache2 & Ubuntu 20.04

I'm unable to get IPV6 addresses from connections to my server. All connections display an IPV4 only even when the IPV6 is available. UFW has apache full and V6 allowed. To ...
Wakka's user avatar
  • 111
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0 answers
116 views

Site is not accessible after deploying to the live server with docker

There is a web application, which is placed within a docker container. When I start the docker container using the docker compose locally - everything works fine. However, after deploying it to the ...
Semen Shekhovtsov's user avatar
0 votes
1 answer
247 views

php-fpm creats only one socket file

I have multiple virtual hosts with unique domain names, users, and root directories for each on Nginx and php8.1-fpm. In the /etc/php/8.1/fpm/pool.d/domain.com.conf contains user = domainuser group = ...
Dev Guy's user avatar
  • 127
0 votes
1 answer
138 views

How to redirect ssh port to another port by username?

I have sshd: Listen 2222 on server, and what I want to do is: ssh -p 2222 userA@ip, and server finds userA, then redirects this connect to 6122 port of this server, but I don't want to modify on my ...
freshzy's user avatar
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0 answers
255 views

IPv6 / Kea DHCP / Ubuntu 20.04 / DNS Server Issue

Here is my current setup: I have IPv6 / IPv4 enabled in my environment. My router is doing RA for that IPv6 subnet. Router is configured with other options flag. I have Kea DHCP6 / DHCP4 server ...
user22593946's user avatar
0 votes
1 answer
82 views

Command not running in Nagios

Can anyone clarify for me why the following code is not running when I place it in command_line for a custom Nagios command? It works when I run it in terminal. command_name notify-host-by-sms ...
DesignerJT's user avatar
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0 answers
575 views

I was trying to remove 'python 3.10' in my ubuntu 20.04 and everything is broken now

I was trying to remove python3 by hitting the command sudo apt-get remove python3 and now the whole system is broken. I tried multiple solutions found on the internet, such as reinstalling ubuntu-...
Elfeqy's user avatar
  • 1
0 votes
0 answers
31 views

Root user action constraints with sticky bit

I have an ubuntu 20.04.x instance on AWS which displayed very unexpected behaviour. I have a file in /tmp: root@ip-10-0-1-145:/tmp# ls -l api_requests_2023-08-23.log -rw-r--r-- 1 www-data www-data ...
Samveen's user avatar
  • 1,873
0 votes
0 answers
36 views

self signed for a site accessible through VPN

I'd like to know if what I'm doing is right or is there another way to do this? I have this site that is accessible through VPN and i'd like the end users not to see the "not secured" ...
Reefo Relaxo's user avatar
0 votes
1 answer
181 views

Block access to remote mysql database using iptable in ubuntu 20.04

I am configuring iptable rules in a Ubuntu 20.04 machine (Client). There is a mysql db in a remote machine (Server). I need to block access from client machine to mysql DB server. These configurations ...
Dhanushka Ekanayake's user avatar
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0 answers
84 views

ip address inet 127.0.0.1 changed unwillingly to 172.27.28.124 (Ubuntu 20.10 without netplan)

Below you can se the address 172.27.28.124 being used for lo. However the address was a few hours ago 127.0.0.1, this is the good value. This should not be changed. Could you please advice on how to ...
ATX's user avatar
  • 113
1 vote
0 answers
2k views

Setup proxy with local CA certificate on Ubuntu 20.04

In our company, we have a proxy server with a self-signed CA certificate implementing MITM inspection. No internet connection is possible without this proxy server. My certificate installation process ...
Green绿色's user avatar
0 votes
0 answers
132 views

Replacing pacemaker ip addresses with static IPs and then back again

Looking to upgrade corosync/pacemaker, a problem is that version 2 and 4 of corosync cannot communicate. Having 3 nodes, on Ubuntu 20.04, seems like it will lead to a momentary split brain, will all ...
KoenDG's user avatar
  • 147
0 votes
0 answers
1k views

How to add new multiple ip addresses with different default gateway ip to same interface on ubuntu server 20.04

and thanks in advance for any help. I got /29 ip address range, and this was after I had set up my server with a different ip and default ip. So, I was assigned a new range of ip's which have a ...
ITisandiamIT's user avatar
1 vote
0 answers
88 views

Setting up a proxy pass for rest api server not working

So I am trying to setup proxy pass to a rest api that is on port 30422, basically what I want to do is have for example sub-domain.example.com link to the port 30422 on the same webhost. I am hosting ...
infamous hvher's user avatar
0 votes
1 answer
458 views

ldap_group_search_base is not working as intented

I've used the below-given sssd.conf file to authorize the users to a server. The issue is some users who are not listed under the DN: cn=authorized,ou=rona,ou=servers,ou=groups,dc=yolo,dc=com still ...
user11482797's user avatar
0 votes
1 answer
273 views

Moving from Apache2 to NGINX configuration

I have been trying to get my website up after moving from apache2 to nginx on my AWS Ubuntu 20.04 server. I have translated the relevant files from apache2 over to my nginx configuration, however I ...
jabroni's user avatar
  • 103
0 votes
1 answer
155 views

Rebuild a drive in a raid 1 array that got disconected

I am running on Ubuntu 20.04.4 LTS. I have 2 drives in a RAID 1 array. One of them got acidentely disconnected but is now connected again. raid1 sdb1[1] sda1[0] I have [U_] How do I synchronize? ...
Ben Edwards's user avatar
0 votes
1 answer
145 views

service file disappeared in Google CLoud VM

I have a Google VM micro instance running Ubuntu 20.04. Last week on this VM, I set up a systemd service that runs a python script. I created the service file (say my_fancy_service.service) as /lib/...
Marc's user avatar
  • 151
0 votes
0 answers
188 views

openstack installation repository in ubuntu focal

I'm trying to install cloud-archive yoga for ubuntu 20.04 focal. add-apt-repository cloud-archive:yoga Ubuntu Cloud Archive for OpenStack Yoga More info: https://wiki.ubuntu.com/OpenStack/...
zabitstack's user avatar
1 vote
1 answer
695 views

named-checkconf throwing error on previously functioning forward zone file

I wanted to add a zone to my bind9 configuration (BIND 9.16.1). I have about 20 domains serviced by this name server, most of which have worked for > 10 years. named-checkconf is throwing errors on ...
David's user avatar
  • 91
2 votes
1 answer
666 views

All of my DNS zones do not make it on the secondary, what is wrong?

TL;DR You may want to quickly jump to the answer to know what happened and not spend time reading the whole question. I have a tool (ipmgr) to generate my zones (I had to manage about 35 of them, so ...
Alexis Wilke's user avatar
  • 2,306
-1 votes
1 answer
333 views

How to configure the OpenVPN like a CTF network

I currently configure an OpenVPN server on ubuntu 20 using this config; It will give private subnet (172.31.40.0 255.255.240.0) access to the clients, But this VPN redirect the client's internet ...
Rumira Daksith's user avatar
-1 votes
1 answer
450 views

Nohup to run multiple PHP scripts

I have about 5 different PHP scripts that must be run by the server continuously even with the terminal closed. How do I run the 5 scripts once via nohup, each with a log of what it generated, and be ...
Tom's user avatar
  • 289
0 votes
1 answer
410 views

Ubuntu can't start/configure mysql-server after upgrading ubuntu from 18.04 to 20.04

I've got a problem with Ubuntu that I can't resolve. I was upgrading my Ubuntu from 18.04 to 20.04 and during the installation process and error occured: apparmor parser error for /etc/apparmor.d/usr....
jakub_pietrzyk's user avatar
2 votes
1 answer
300 views

no connection and cgroup error on standalone kubelet with containerd on ubuntu

I am trying to setup kubelet component as standalone service from kubernetes page, though it seems I am missing something. I've configured the containerd + runc (according to steps) with: $ mkdir -p /...
Robson Jr's user avatar
0 votes
0 answers
242 views

SCP on Ubuntu OpenSSH Server for Cisco backups

I am having a bit of an issue and I believe I need some help. We have an On-prem SFTP server which will be deprecated soon, so in the mean time I need to set up another SFTP option in AWS running on ...
brianbelden's user avatar
0 votes
0 answers
226 views

SAS drives not detected in JBOD's

I have two bnib Supermicro SYS-937R-E2JB JBOD connected with SFF8088 cables to my LSI 9200-8e HBA in my Dell T5810 workstation running Ubuntu Desktop 20.04. Neither the Seagate 12TB SAS or the ...
Murrmurr's user avatar
1 vote
2 answers
1k views

PowerDNS Master/Slave AXFR chunk error: Server Failure

Short description I´m running two PowerDNS 4.2 machines on Ubuntu 20.04 with PowerDNS-Admin and PowerDNS-recursor. Both machines use mysql backends. The problem is, wehn ever I start a NOTIFY from ...
zenz's user avatar
  • 11
0 votes
1 answer
804 views

RCVD_IN_DNSWL_BLOCKED in SpamAssassin as it doesn't use local DNS

I'm not sure what I have wrong here. It used to work on Ubuntu 18.04, but doesn't on 20.04 it seems. I have unbound DNS server setup: unbound-control status version: 1.9.4 verbosity: 1 threads: 1 ...
Andrew Newby's user avatar
  • 1,184
0 votes
0 answers
80 views

Could not resolve host: payments.paystation.co.nz

We have started to have an increasing "could not resolve host" errors from payments.paystation.co.nz. When we asked them about it they stated the following: "Those errors aren't from a ...
Gareth Foster's user avatar
2 votes
2 answers
565 views

How to bind spdk driver to NVMe device if root filesystem is mounted there?

I am trying to use SPDK in Ubuntu 20.04 (Linux kernel 5.4.0) to run storage applications. My NVMe SSD is allocated as below: $ lsblk ... nvme0n1 259:1 0 1.5T 0 disk ├─nvme0n1p1 ...
Sadman Sakib's user avatar
1 vote
1 answer
1k views

How to add nginx configurator group?

I want o create a user group that has permissions to create/edit/view nginx configs without sudo permissions, but I heve no idea how. Creating a normal user group and setting owner:group to same-owner:...
Crazycrafter 227's user avatar

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