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Questions tagged [ubuntu-18.04]

Ubuntu 18.04, named "Bionic Beaver" is a Long Term Support release of Ubuntu Linux (released on April 26th, 2018). Note that http://askubuntu.com is specifically dedicated to Ubuntu questions.

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Error “undefined symbol: mysqlnd_connect”

I am building a VM to develop an existing PHP 5.6 application using Vagrant 2.1.2. My VM operating system is Ubuntu/Bionic64. This app requires the mysqli extension with mysqlnd, among other packages ...
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Xubuntu 18.04 Persistent Live USB: Will persistence be carried upon full installation to a machine? [migrated]

I've created an Xubuntu 18.04 persistent live USB stick and installed several softwares for web development, such as XAMPP, Sublime Text 3, Google Chrome, etc.. I did some configurations as well in ...
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Intel x550 not negotiating to 10Gb

We have a machine with an Intel x550 and a Cisco Nexus N9K-C9372-PX-E. For whatever reason, it will only negotiate at 1Gb, even though it is 10Gb capable and is being plugged into a 10Gb switch. This ...
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1answer
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Blocking all ip's except my public ip on UFW ubuntu 18.04

Im setting up a web server on 18.04 and I want to be able to block all ip's except my public ip from accessing ssh (22) on the UFW. Thanks for your help!
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AWS Ubuntu 18.04 Change Nameserver?

How can I change the DNS nameserver for a Ubuntu instance on AWS? When I edit /etc/network/interfaces it tells me to check /etc/netplan. That says that changes will not persist across an instance. ...
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33 views

Error in system module

I am trying to install open daylight using karaf.0.9.1 in Ubuntu 18.04.1.0 Also, I had installed default-jre-headless then: export JAVA_HOME=/usr/lib/jvm/default-java finally, I start installing ...
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25 views

Invalid file for download generated with PHP and www-data user

I have an amazon ec2 linux instance (ubuntu 18.04). There I installed my web site which is reacheable here. In the website I have a Download button which triggers a PHP that generates some files in /...
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1answer
17 views

Restrict ssh user to connection only

Setting up an SSH jump box to allow some outside people to access an internal server. I have the authentication stuff all working where they will use a private/public key pair to authenticate. I'll ...
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How can I ensure php recognises changes made in the php.ini file?

I've set up a new ubutu server. I have output the settings in a debug page, and can see the configuration file location: Configuration File (php.ini) Path: /etc/php/7.2/apache2 and have edited ...
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39 views

Ubuntu 18.04 server - how to change or adjust operating system logging for a certain systemd service?

I've tried quite a bit of Googling on this but have not come up with much so I figured I'd ask here. Here's my current problem: I'm running Ubuntu 18.04 server pretty much stock. The purpose of the ...
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1answer
14 views

aws cli not configured when called from python script inside systemd service?

I am using an EC2 instance with ubuntu 18.04 and python 3.6. I am running a python script uses aws cli calls for various things. Before running the script, I configured the aws cli with my access ...
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1answer
19 views

Enforce usage of VPN-provided DNS servers on Ubuntu 18.04

On a vanilla Ubuntu 18.04 headless server, the OpenVPN client is used to connect to a remote network in tap mode. The address, default gateway, DNS servers etc. are provided by a DHCP server on the ...
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Ubuntu 18.04 server - can unattended-upgrades cause MySQL to crash?

Quick overview of the company product I'm working on before I ask my question: We have a server running a pretty much stock install of Ubuntu 18.04 and a vision app. The main purpose of the server ...
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43 views

list directory is slow when using NFSv4

I'm currently setting up NFS based file sharing between my Mac client (Macos 10.14.1) and Raspberry Pi3 server (U16.04.1 LTS). As I dual-boot my Mac (MacOS/Ubuntu18) I want to use my Pi with NFS (I ...
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1answer
36 views

ModSecurity for Apache 2.4.34 Failing with Invalid command 'SecRuleEngine'

I have A Ubuntu 18.04 server, installed Apache 2.4.34, and have compiled ModSecurity 3 with the apache module. I can successfully load the module, by adding: LoadModule security3_module modules/...
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1answer
64 views

mysql.service location on Ubuntu 18.04 server?

I need to edit the mysql.service file to make MySQL automatically restart when it crashes. I'm working with a pretty much stock Ubuntu 18.04 server install and followed these instructions https://www....
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33 views

Ubuntu 18.04 - what could cause a web page to not be served when Apache is running ok?

The company I work for has a server running Ubuntu server 18.04. The server is connected to various cameras and performs computer vision on the images, then saves the results. When certain events ...
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View / tweak TCP window size settings on Ubuntu 1804

I have a typical long fat network -- clients connect to servers with large bandwidth but also significant latency due to geographic distances of 30ms to 100ms, transferring large files. I've noticed ...
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1answer
36 views

Google Compute Engine Ubuntu - OpenSSL 1.1.1a

After performing apt-get upgrade on my Ubuntu 18.04.1 LTS server running on Google Compute Engine I was unable to connect to my server via the WEB SSH. The window is stuck with the following message: ...
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54 views

Docker 18.09 not talking IPv6 (on Ubuntu 18.04)

Brand new and fully patched Ubuntu 18.04 instance (on a Linode VPS) with Docker 18.09.0 (build 4d60db4) installed from the official Docker repo. IPv4 networking is running fine, both between ...
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1answer
20 views

2 physical interfaces change the link to a different interface name, on reboot

Environment: I have two physical network interfaces on my system: Qualcomm Atheros Ethernet Realtek Ethernet (RTL-8169) On the system, i have Ubuntu-18.04. Problem: I have configured: Realtek ...
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38 views

gridengine problems on Ubuntu 18.04: qmaster not started (connection problems)

I have a problem with the sun grid engine on my ubuntu system since I have upgraded my system to ubuntu 18.04 (bionic). I appologize, it might be a simple problem but I cannot find it, even after 4 ...
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1answer
102 views

Ubuntu 18.04 DHCP server can't pass its DHCPOFFER to clients (endless DHCPDISCOVER/DHCPOFFER loop)

I noticed that on Ubuntu 18.04.1 DHCP server (isc-dhcp-server) always responds (DHCPOFFER) directly to the IP it offers to the host having sent DHCPDISCOVER. The DHCPDISCOVER packet has its Broadcast ...
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1answer
71 views

uwsgi won't start on Ubuntu Ubuntu 18.04.1 LTS

I am following this Askbot installation tutorial, and it goes well till the very end, when I can't start uWsgi with: sudo systemctl restart uwsgi Errors which I get are: sudo systemctl restart ...
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15 views

Load Pure-FTPd custom configuration (/etc/pure-ftpd/pure-ftpd.conf) during boot on Ubuntu 18.04

With regards to https://download.pureftpd.org/pub/pure-ftpd/doc/README.Configuration-File It says, run /usr/local/sbin/pure-ftpd /etc/pure-ftpd.conf to start the daemon (and load my custom ...
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How can I make ethernet take precedence over wifi on Ubuntu 18.04?

Goal Let ethernet take precedence over wireless when ethernet cable is plugged in Method After having done a fair amount of Googling and reading I've come to a point where I believe what I should ...
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1answer
56 views

DHCP conflicts on two Ubuntu 18.04 servers

I have two machines running Ubuntu 18.04 server edition. Networking go through netplan. They get their IPv4 from a DHCP server v6.3 running on Windows Server 2012 R2. For some reason, they don't ...
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1answer
45 views

The `zones.rfc1918` file for Bind9 and other 'good practice' for the Ubuntu 18.04 era?

I am setting up Bind9 on Ubuntu 18.04 and found this SF article for Ubuntu 10.04: What is the point of the zones.rfc1918 file for Bind9?, with a comment citing documentation from Penn State in 1996. ...
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11 views

Cloned Ubuntu Server - Grub disk no longer present on apt update

I have many cloned Ubuntu Server (Bionic) systems, image was done using Clonezilla. This morning, I did an apt upgrade and those grub packages upgraded: Preparing to unpack .../04-grub-pc_2.02-...
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2answers
77 views

Ubuntu 18.04.1 hangs regularly

I have some Ubuntu 18.04.1 virtual machines installed on VMWare ESXi 6.5, all of them have 3 core, 3GB ram, attached to a SAS Storage array. The servers are running nginx 1.14.0 as reverse proxy for ...
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1answer
43 views

Multiple IPs to different domains Apache2

I have managed to do this before without any issues, now Im stuck. I have the following problem: I have two IPs connected to my Ubuntu VPS. 111.111.11.111 and 222.222.22.222. 111.111.11.111 is the "...
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105 views

Hide a systemd service for non-root users

I have a custom service entry in systemd on Ubuntu 18.04. The main executable is a script which creates some processes: foor@bar:~$ systemctl status XXXXXX.service ● XXXXXX.service - XXXXXX Loaded:...
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1answer
31 views

Network connection slow, one-way, between Ubuntu and Mac OS

I'm stumped. I have three nodes -- 2 iMacs and 1 Ubuntu 18.04 server -- all on the same subnet. When I send files, e.g. scp, from Ubuntu to Mac it's relatively fast (5mb/s - not lightning but ...
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No route to host for Gateway on Ubuntu 18.04

I changed my router last night and computers are fine and wireless fine etc. My development web server seemed fine I can access it any my websites and SSH etc however I noticed that I have no internet ...
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2answers
903 views

BASH-create a 'www-data' crontab that runs a PHP file

I need to get this to run in a cron file in /etc/cron.d/: */15 * * * * php -f /var/www/nextcloud/cron.php ...but, my scripts don't run. It's permissions are set to 644 and I need to create it with a ...
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1answer
92 views

Modern transparent folder compression in Ubuntu 18.04

I'm looking for a way to transparently compress files in a directory, that will be shared over SMB. I have a server, running Ubuntu 18.04.1 LTS, and I use it for file storage. Mainly what I want to ...
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How to reconfigure network settings headless?

I recently installed Ubuntu Server 18.04.1 on the hard drive of my little server. As I didn't have an internet connection, I did not configure the DHCP settings etc. and just continued. I also ...
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1answer
84 views

Exim4 : “Connection timed out” whatever the forwarding smtp server

Exim is configured on a newly provisioned VM from a public cloud provider with public IPs (scaleway.net) Purpose: Be able to send mails from CLI (or scripts) to public destination recipients (gmail,...
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1answer
32 views

Edge case UFW setup

I have a small edge case. I want to tighten down my servers as much as possible while remaining their given functionality. I have UFW enabled with the current default rules: Deny all incoming - Deny ...
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1answer
204 views

Adding a whole IPv6 /64 block to a server using Netplan

I have read Adding a whole IPv6 /64 block to an network interface on debian We want to make use of the AnyIP feature to add a whole IPv6 /64 subnet block to a web hosting server but using Netplan ...
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115 views

apache2.4 on Ubuntu 18.04 Failed to acquire SSL session cache lock

please help to solve this issue. This problem occurs after 1-3 days of apache start. After restarting apache, the error / warning does not occur again, but after some time or several days, the error ...
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1answer
24 views

Vagrant/VirtualBox guest boots only in single processor mode after upgrading Ubuntu guest from 16 to 18

I had a running WEB server with Ubuntu 14.04.5 LTS with LAMP environment. The server is running in a Vagrant/VirtualBox virtual machine. I upgraded it successfully to Ubuntu 16. After that I tried to ...
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1answer
101 views

ZFS pool degraded on reboot

I have a Ubuntu server set up with a 14-disk ZFS raidz2 pool. About 80% of the time, on reboot, I will end up with a degraded pool with two of the disks marked as faulted. The drives that are ...
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1answer
112 views

Windows and WSL docker-machine conflict

I have a windows 10 and I installed the WSL ubuntu 18.04 inside. Since the WSL can't use the docker due to virtualization, i ends up use my DigitalOcean droplet as my docker machine target. I follow ...
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Server with two NICs behind Ubiquiti ERX, connected to two separate private company networks with possible similar address spaces

We have a Ubuntu 18.04 Server running a web application that needs to be accessed by two companies. We have two NICs on the server, one goes to our local "shop floor" network (10.200.145.0/24) which ...
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Connection to the IMAP server interrupted when connecting to Postfix + Dovecot from Outlook

Goodmorning everyone. It's been some time since I have a problem with the configuration of my mail server on Ubuntu Server 18.04.01 made with Postfix and Dovecot. When I try to send / receive emails ...
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Ubuntu 18.04 font showing up bold, regardless of selected weight

I'm trying to adjust the desktop font using dconf Editor. I'm trying to select a font weight that is fairly thin, but it displays as the bold version. This image shows what's going on. font weight ...
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1answer
641 views

Configuration change for Apache + PhP-FPM 7.2 necessary?

Until now, I was using Ubuntu 16.04.5 Server with Apache, Nginx as a reverse proxy, PHP 7.0 + FastCGI + FPM, everything updated to last version. Everything went fine. This is one Apache virtualhost, ...
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342 views

Setting up Bridge for KVM on Ubuntu 18.04.1 Server

I'm trying to setup KVM on Ubuntu 18.04.1 Server. I tried following the instructions here, however I got stuck at the part which has me configure the bridge. I don't have a 50-cloud-init.yaml file, ...
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1answer
45 views

Wrong(first/default) SSL certificate served Apache 2.4 - Ubuntu 18.04 muliple domain web server

Background: We have migrated 2 old webservers to 2 new, more robust servers- Ubuntu 17.04 and 18.04. We purchased Thawte SSL certificates for the domains we host(about 20) to use on 2 servers. Each ...