Questions tagged [ubuntu]

Ubuntu Linux is a Debian derivative that aims to bring Linux mainstream. Questions on this site should generally refer to Ubuntu Server. Note that http://askubuntu.com is specifically dedicated to Ubuntu questions.

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21 views

Do I need a SWAP partition?

I am going to remake a server with Ubuntu 20.04 It will have 6 GB of RAM, a 20 GB SSD for the operating system, and a 100 GB SSD for data. Should we make a SWAP partition ? If so, how many GB are ...
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1answer
23 views

Aliasing Server Name in SSH Command

This may be trivial, but I am not sure how do it safely and optimally. I have a few servers (AWS EC2) into which I ssh from the bash. Those server names are long. How can I alias them, so instead of ...
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How to install MySQL 8.0?

I will be moving my site from an Ubuntu 18.04 server to an Ubuntu 20.04 server On my old server I had installed MySQL this way : $ wget -c https://dev.mysql.com/get/mysql-apt-config_0.8.12-1_all.deb $ ...
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Choosing external IP when multiple IPs on one interface

My hosting provider (OVH) allows to get a "failover IP" - that's kind of the same principle as ElasticIP, where you get a "permanent" IP address that you can move from one VM to ...
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1answer
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Ubuntu 18.04: Communication to server on localhost stops working after setting a port forwarding rule

I have a Ubuntu 18.04 device with two network interfaces, ethernet and USB LTE modem. There is IP camera connected directly to the ethernet port and it has address 192.168.0.90. I use the LTE ...
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1answer
26 views

Stop something running on a port on a server (Ubuntu)

I'm trying to run another attempt of a Minecraft server on the normal port, except when I try to run it it says the port is taken. How can I change the port/stop the thing running on that port? Thanks,...
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22 views

Configuring NUT for old serial connected UPS (Tripp-Lite)

I have an old Tripp-Lite UPS (SU2200RTXL2UA) which I need to communicate with via it's RS232 Port (this model doesn't have a USB port). I'm trying to figure out which Serial NUT driver would be most ...
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0answers
30 views

Can't connect to local linux server anymore, shows “unable to connect”

I'm very new to web hosting and tried to learn it by hosting one on my linux server. At one point I was able to type in my public ip address and see my very simple test page, but I can't now and I don'...
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12 views

Postgresql prompts for configuring tzdata when installing during docker image building [duplicate]

I am trying to build a docker image with postgresql with Ubuntu. When the image is being built during the postgresql installation apt prompts for the config data (e.g. time zone settings), but the ...
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1answer
44 views

Strange Postfix logwatch log summary on my Ubuntu 18.04 Server (Local/Physical Server)

I would be very thankful if someone could please help me explaining this logwatch summary of my postfix installation on my ubuntu 18.04 LTS. I have googled a lot but could not find anything relevant ...
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1answer
54 views

How to install nginx-module-brotli?

I have a server with ubuntu 20.04 But I am unable to install nginx-module-brotli for my nginx server. Here are the commands I use to install Brotli for Nginx : $ sudo apt install git gcc cmake ...
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1answer
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How do I configure Postfix to send emails with ProtonMail Bridge?

I have an Ubuntu 20.04 server and I followed this tutorial to install ProtonMail Bridge : https://pychao.com/2020/06/10/update-on-using-protonmail-bridge-on-headless-wordpress-linux-servers/ The ...
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54 views

Why does auditd report UID 1001 is trying to mount a disk when Ubuntu upon boot?

I'm seeing a message from auditd I don't understand. My OS is Ubuntu 20.04. Every time I boot the server, an audit entry says user id 1001 (a normal user) is making a syscall to /usr/bin/mount. But ...
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How to change the default password in Solr?

I have a Solr server with Ubuntu 20.04 I followed the doumentation, but I cannot change the default password. How can I do this ? ubuntu@www-example-com ~ $ $ curl --user solr:SolrRocks http://...
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1answer
37 views

Problems with improper vhosts configuration on Apache 2 / Ubuntu 14.04

I have various subdomains set up successfully as virtual hosts on my Digital Ocean Droplet. For some reason though, my latest subdomain is serving a different subdomain, and I'm not sure why. So if ...
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1answer
25 views

Site stopped working after restarting EC2 instance, shows this site can't be reached

My wordpress blog site stopped working after I restarted my EC2 instance in AWS.. What could be the reason behind this ? I cannot access mysite.com/wp-admin as well.. Does anyone know how to fix this ...
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1answer
36 views

Can't set open files limit for user www-data and process PHP in ubuntu 16.04

I am having trouble setting the open files limit for user www-data and process PHP in Ubuntu 16.04. I have set all the following to 65535: /proc/sys/fs/file-max /etc/sysctl.conf /etc/security/limits....
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1answer
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MySQL 5.7 on Ubuntu 18.04.4 LTS does not recognize any configuration-variable

I am trying to create a master-master replication between two databases, one being an RDS instance with MySQL 5.6.44 on AWS the other one being on an Ubuntu-Server running MySQL 5.7 (I was unable to ...
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2answers
102 views

Putty connection refused on clean Ubuntu azure VM

I have recently created an Ubuntu VM on Azure. In order to access the created VM, I've installed Putty on my windows 7 machine. But I cannot make it connect till now. At the start Putty was giving the ...
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How do I run a single file ASP.NET Core app on the server?

I have produced and been trying to run a single file app (<PublishSingleFile>true</PublishSingleFile>) on linux and haven't been successful. When I am publishing the app, I have a setting ...
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23 views

How to use iptables to link two vlans

I have two networks, one being the main, with a network card eth1 (found on an Ubuntu Server 18.04 configured to be a router) and internal IP address 192.168.5.1 (with is the gateway) and another ...
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1answer
40 views

Does removing ISPConfig delete any websites on server?

Does removing or uninstalling ISPConfig cause any websites on the server to get deleted or harmed in anyway?
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1answer
33 views

Install OpenSSL 1.1.1g in Ubuntu 16.04.06 LTS

I followed the instructions in https://cloudwafer.com/blog/installing-openssl-on-ubuntu-16-04-18-04/ but i get always an older openssl version when i run openssl version. In my case the 1.1.1e. It ...
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2answers
75 views

Unable to configure IPv6 correctly in Ubuntu 18.04

I have a cloud instance on OVH which is accessible over IPv4 but not IPv6. It's running Ubuntu 18.04. I've found conflicting advice about using netplan vs configuring systemd-networkd directly, but ...
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12 views

username\password in zabbix agent config file for Postgres monitoring?

reading the guide on configuring Agent 2 for Postgres Monitoring with Zabbix it mentions ... "Set the user name and password in host macros ({$PG.USER} and {$PG.PASSWORD}) if you want to override ...
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10 views

Rsyslog creates filename with utf8 characters

I have the following configuration in my rsyslog server (version 8.16 on ubuntu 16.04): input( type="imrelp" port="514" ) template( name="path" type=&...
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0answers
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Fujitsu Primergy TX140 S1p wont recognise hard drives

Recently purchased a Fujitsu Primergy TX140 S1p server and today i installed three 4TB segate barracudas and was begining to setup the server when i noticed no lights from the hard disk bays. looking ...
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10 views

Log User Process Usage StartTime and EndTime

We need to create a service to log User Process Usage Start Time and End Time along with username (Excluding the system level process). Sometime, the user maybe super user, so we need to log LoggedIn ...
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34 views

Quota exists for deleted groups

I'm on Ubuntu 20.04. I'm trying to set up group quota for a disk on the server. I added 5 users to group1 and 7 users to group2. Then I set group quotas for a disk on the server and checked the ...
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42 views

Dockerized Wireguard with killswitch doesn't allow the local access of a service sharing the network

I got two containers linuxserver/wireguard and X on Ubuntu (server) 20.04. X got a WebUI on port q that I would like to access via my local network (192.168.178.0/24 - fritzbox). They are configured ...
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0answers
35 views

Openstack remote console

Hi I've recently installed openstack ussuri via juju and it is working fine. I've installed almost all of the cloud ready images(qcow2). The problem is that when I install ubuntu cloud 20.04, I cant ...
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0answers
16 views

Connection Refused can't connect to local website [duplicate]

I am able to run a script on my organizations website but I can not run that same script on my localhost website as I keep receiving a HTTPSConnectionPool(host='localhost', port=44345): Max retries ...
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2answers
47 views

Ubuntu - iptables stops redirecting port 80 to 8080 suddenly without any pattern

I have a ubuntu VPS which I am using to host my java based application. It has tomcat installed on port 8080. I have used below iptable command to route traffic from port 80 to 8080. Honestly, I am ...
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1answer
52 views

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....
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1answer
59 views

MySQL error starting

I can't start mysql and when I run any type of start command, whether it be systemctl start mysql or service mysql start, I get the same error: Job for mysql.service failed because the control process ...
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0answers
8 views

Protecting primary SMB Server & Setting up a bridge [closed]

I have access to password protected CIFS share say SERVER A. But I don't want to expose SERVER A credentials or ip in the client device. is there a possible way in linux where I setup a bridge (...
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0answers
84 views

Certbot fails with AttributeError: 'module' object has no attribute 'Locale'

I setup a new server a couple of months ago, running Ubuntu 18.04 LTS. I successfully installed certbot and created my certificates using the cloudflare DNS plugin. It's now getting to be time for ...
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0answers
21 views

Installing a newer KVM guest distro/suite than the host [closed]

I have an old Ubuntu KVM (Precise 12.04) host (I know it's old!) and I want to install a guest which runs a newer distro (Xenial 16.04). When I run ubuntu-vm-builder it tells me VMBuilder.exception....
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0answers
23 views

Wordpress multiste on different domains [closed]

we are using ubuntu servers with directadmin and have a WordPress multisite with a few subsites. We have a few domains like this domain.com domain.net domain.org and so on... We would like to map each ...
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0answers
31 views

MYSQL wait_timeout and maxlifetime

A few months ago I acquired a VPS and a few days ago I decided to install MYSQL in it, and I am having some errors regarding Minecraft / Spigot plugins that require MYSQL. The error it gives me in ...
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0answers
18 views

/etc/profile, /etc/bash.basrc, ~/.profile, ~/.bashrc are not read

I am a running "Ubuntu 16.04.6 LTS" Linux. I've installed/upgrade some packages, but i do not remember exactly which packages. Since this operation, i have lost ls coloration for all users ...
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1answer
45 views

Replace failing LVM disk with root

This was my first setup so it's a bit messy. Extremely small root volume (3.9GB) which I'd like to increase but the problem right now is that the disk is failing and I need to replace it. root@...
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0answers
12 views

OpenVPN auth with Freeradius fails with error message: Module is unknown

I have installed an OpenVPN server with Easy-RSA. I generated the certificate and signed it on my CA Server and copied it back to VPN server. I can establish the client-server connection via ...
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0answers
19 views

Can't reconnect VPS Essential OVH after removing set_hostname from cloud-init

I have a VPS Essential in OVH with Ubuntu 18.04 LTS installed. I just removed the set_hostname module of the cloud_init_modules from /etc/cloud/cloud.cfg and reboot the system and now I cannot connect ...
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0answers
48 views

Removing low Battery Indicator in Ubuntu 20.04

I have recently installed Ubuntu on a mini pc with a zx8350 cpu. The installation recognizes the CPU as a laptop CPU and automatically displays the "low battery" indicator even though the ...
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0answers
16 views

Detecting Spyrix Keylogger in a system [duplicate]

Our UTM (Firewall) logs showed Spyrix(Key Logger) has been downloaded on a particular IP in our network. While, on that system, we couldn't see Spyrix. what are the ways to detect traces of syprix in ...
0
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1answer
32 views

Strict Iptables on docker

Iv'e been trying to configure iptables for a docker (that runs on an ubuntu host). I haven't worked with docker before and I've been informed that docker requires special treatment. I want to allow ...
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3answers
89 views

Ways and tricks to secure website / make it private? [closed]

I am soon launching a website but I want it to be secured / private for testing. It is on its real domain now; I already added a htaccess authentication (with htpasswd). I'm on apache2 / Ubuntu 16.04 ...
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2answers
95 views

Reverse DNS is not a valid Hostname with existing PTR record matching HELO/EHLO

There are a ton of questions related to this issue - and I have gone through almost each one yet this issue persists and I have no idea how to proceed further. My mail server is setup with postfix, I ...
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1answer
33 views

How to fix vsftpd error: 500 OOPS: cannot change directory

I am trying to setup vsftpd for anonymous-only, read-only access on my Ubuntu 20.04 VM. Home directory is /home/ftp/filebase. When I try to login, I get the error 500 OOPS: cannot change directory: &...

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