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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Ubuntu Server 18.04 slow performance

I use a server with these hardware: Cpu: AMD Ryzen 9 5950X 16 cores Ram: 128GB DDR4 ECC NVMe SSD HD There I have installed Ubuntu 18.04 LTS with latest kernel. No panels only the following services ...
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StrongSwan Implementation on Lanner FW-7525 devices

I have two Lanner IP-Encryptor (FW-7525) devices with Installed Ubuntu 18.04 servers in both of them. Then I install and build StrongSwan in both of them. I connected one Lanner Device to one LAN ...
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Some advanced IPTables routing

I'm trying to route some public and private IP addresses using Ubuntu Server 18.04 using iptables. Please note: I've changed the first bits of my IP Address for privacy, but kept it numerical for ...
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Bind9 multiple interfaces

I was wondering if the following question is possible I have a website that runs on nginx and I have a bind server on that same machine that redirects certain domains to that website This machine has ...
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how do I get past dpkg --configure stall with base files

We have 2 Ubuntu 18.04 LTS server hosts in a remote datacenter stalling at the same place while trying to upgrade with apt: admin@location-a:~$ sudo apt upgrade E: dpkg was interrupted, you must ...
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sbin: root@policykit -1/9 high CPU

The process "sbin: root@policykit -1/9" takes high CPU in our Ubuntu 18.04.4 LTS server. Can anyone help to find what it is? Thank You.screenshot
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add-apt-repository fails due to gpg key timeout

I am running a Mail-in-a-Box server on Ubuntu 18.04. As part of the setup/update script, it attempts to execute the command add-apt-repository -y ppa:certbot/certbot. This fails with the following ...
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map server to local windows machine

Forgive me if this is the wrong place to ask tis question. I run a website along with some self hosted software from a shared server (Ubuntu 18.04) I recently had an issue where nothing would work and ...
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Trying to resolve apache crashing issues

I've been fighting this issue off and on again for a couple months and it's finally getting to me. I've been to this site (and SO) several times (among others as well) and followed the advice from ...
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ping not working on some domains

I'm trying to get my head around an issue I'm facing. I can ping most sites: ping -v google.com ping: socket: Permission denied, attempting raw socket... ping: socket: Permission denied, attempting ...
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Port 22 Connection refused on EC2 instance after upgrade to Ubuntu 18.04

According to this question, it's not a good idea to upgrade an EC2 instance. I'm cool with that. However, I would still like to know the problem in case this happens on a physical device. I can no ...
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Openstack: The ext4 file system creation in partition #1 of Virtual disk 1 (vda) failed

I followed the official devstack All-In-One Single Machine installation and after everything installed, when I create an instance with 1GB ram and 10 GB hard disk of ubuntu 18.04 desktop the messenge ...
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iptables : ! not allowed with multiple source

When I run this command : sudo iptables -I FORWARD '!' -s x.x.x.x,y.y.y.y -d 172.18.0.3 -p tcp --dport 9114 -j DROP I get the error : iptables v1.6.1: ! not allowed with multiple source or destination ...
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Postfix still using port 25 after specifying port 587 to be used

I run Ubuntu 18.04 on an AWS/EC2 instance. I have installed mailutils and postfix in hopes of making a send-only mail server. I have read that several providers block port 25 as a means of preventing ...
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Error dbus-daemon[1466]: [system] Activating systemd to hand-off: service name='org.freedesktop.login1'

I rebooted server running Ubuntu 18.04 and run into some problems. Basically almost every command I enter gives me this error: mail-server:~# systemctl status dbus.service Failed to connect to bus: No ...
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sa-compile update error with rule compilation

I have an install of Ubuntu 18.04.5 and I'm trying to update the sa-compile (version 3.4.2) package because I have a file server set up on it which uses spamassassin (version 3.4.2). Every time I try ...
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Maria.db Service Doest Not Start in Ubuntu. InnoDB: The innodb_system data file 'ibdata1' must be writable

When I try to restart mariadb.service I get this error messages: ● mariadb.service - MariaDB 10.4.12 database server Loaded: loaded (/lib/systemd/system/mariadb.service; enabled; vendor preset: ...
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Change network interface name with systemd.link on Ubuntu 18.04.5

I am trying to set some universal names for the predictable names. I am doing this to be able to have the same interface names on all my machines. Iam trying to follow "Example 2. /etc/systemd/...
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Grab process id of perl script running

I'm able to use this terminal command to find a program called massdns running on my server: ps -C massdns -o pid= Which gives me the pid that I want. I'm trying to use the same to find a script ...
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KVM vps scsi disk

CentOS 7 ISO installer is not able to detect disk when using scsi disk driver on a KVM server with Ubuntu 18+ on it. <disk type='block' device='disk'> <driver name='qemu' cache='none'...
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can't initialize iptables table 'nat' under qemu

I am facing an issue while starting docker inside s390x container under qemu on Ubuntu 18.04 host running on amd64. Steps followed (On amd64 host): docker run --rm --privileged multiarch/qemu-user-...
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Cron to find multiple file types and automatically delete them

I am trying to put together a command that will find multiple file types and automatically delete them. I want to run this in a cron every 10 minutes on my server. I would like to find files of type: ....
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ERR_CONNECTION_REFUSED I can not connect my Ubuntu Server

I have Ubuntu server that I am serving Django project. But I can not browse anything. I get ERR_CONNECTION_REFUSED error on all browsers. Server host, OS, and applications: Digital Ocean Ubuntu 18.04 ...
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Daily Apt Upgrade causing oom-killer to kill my java server

My server has died several times in the middle of the night because of this. How much memory is apt-upgrade asking for? Is it being reasonable? I'm trying to decipher the logs here. Any help or ...
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Apache2 stopped working after upgrade to v2.4 ((38)Function not implemented: AH00141)

I was happily running apache2 and mysql on a Ubuntu 16.04 server with no problems, but yesterday I noticed that there were a bunch of updates available and I installed them using apt-get. One of the ...
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Unable to compress 18GB file on Ubuntu Linux 18.04

It never happened to me before, but I'm unable to do a simple task such as compressing a 18.5 GB file on Ubuntu Linux 18.04 with any of the popular compressing tools such as gzip, bzip2 and 7z. All of ...
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Why do Calico rules stop `netfilter-persistent` from starting at boot time?

I run a Kubernetes cluster on Ubuntu 18.04.5 nodes. When I reboot my nodes, netfilter-persistent fails to load because of some bogus Calico rules. As a result, no iptables rules are loaded at boot ...
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disabling DST time change or disabling zoneinfo file updates in Ubuntu

I am having Ubuntu 18 web server with MySQL database. We do calculation based on timezone. i read that changing the sever timezone to GMT+_7 we can solve the DST time changes, as i tried it already ...
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How to change the docker.socket group

I am managing several compute hosts running Ubuntu 18.04 (with systemd) and Docker inside a mostly trusted network. I have an auth server so rather than manually add users to the docker group, so that ...
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Accessing a single virtual volume on DELL ME4012 from multiple hosts

I have one DELL Powervault ME4012 connected to two host servers (DELL PowerEdge R740 on Ubuntu 18.04) using 12 Gbps SAS HBAs. The ME4012 storage is configured as one virtual volume with RAID type ...
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Enable to connect with FTP after right changes in Ubuntu

I created a user like this on my server: sudo adduser [username] echo [username] >> /etc/vsftpd.userlist usermod --home /var/www/[username]/public_html [username] I was able to connect to the ...
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Nuxt.js program not running on the Main Domain with Apache in Ubuntu

I have a Nuxt.js program that I run on Apache in Ubuntu OS. When I port it to a subdomain like www.example.com, it works fine; But when I port it to the main domain such as example.com, my program ...
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Network interfaces get stuck and need to turn off/on to resume traffic

I am using Asterisk on Ubuntu 18.04 and on Debian buster. The network interfaces (for SIP Signaling and RTP) get stuck after sometime (2-3 hours) and need to turn off/on the interfaces to resume the ...
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allowing remote connection to send emails

i have setup my vps as Postfix as a Send-Only SMTP Server on Ubuntu 18.04 and i want to send emails remotely not locally on server when i send using the server locally it works but remotely or ...
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Is Nscd required on the client for accessing an LDAP server without anonymous access?

I have an Ubuntu-18.04 machine that I need to setup to access an LDAP server that does not support anonymous lookups. I'm wondering if Nscd is required to be running on this Ubuntu client? Most of the ...
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editing files with nano adds a bytemark to the file which nginx prints to the client

When we have to edit php files on the webserver, sometimes our website prints out part of what i think is a bytemark to "lock" the file from nano. On the website, it then adds weird strings ...
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Postfix deferred queue

I search and search and do not find answer. I have problem with Polish email providers and try to talk with them but ... can somebody tell my what means this numbers for qshape deferred I'm talking ...
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Creating a raid5 array with 4 disks in Ubuntu is only giving me 3 active devices

When installing Ubuntu 18.04 LTS in a new machine, I'd like to create a RAID5 array. I have 4 1TB disks available. However, since Ubuntu can't boot into the RAID5 array, I'm having to use one of the ...
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Systemd: how to start service after another service started

I have these two services, one is Google start up script service and second one is redis service, I want to start redis service once the startup script service is started and done, I have these ...
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Cannot find rule ID to whitelist an IP in ModSecurity

I have a local IP that was apparently banned. I would like to whitelist it. The subnet is already in my /etc/modsecurity/modsecurity.conf file: SecRule REMOTE_ADDR "@ipMatch 192.168.0.0/19" &...
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Linux Headers Vulnerabilities on Ubuntu 18.04.5 LTS

We have internal and external SLA's that we adhere to with regards to fixing vulnerabilities of a critical nature. Currently, we are running 18.04 LTS. The MOTD says: 102 packages can be updated. 0 ...
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Old KVM Guest not starting after reboot

I have a bunch of Virtual Machines in a Ubuntu 18 Guest machine. Until recently they have all been working without any problem. However after I restartet one of the Guests(also Ubuntu) it is now not ...
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How to Set Up folder Based Virtual Hosting (Vhosts) With Apache Web Server on ubuntu like /localhost/site1 localhost/site2

I am trying to configure virtual hosts with multiple sites with codeigniter based on folders on ubuntu 18 with Apache2. By this what I mean is site1 is to be accessed by using url http://localhost/...
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NFS mount hanging when mounted from fstab (Ubuntu 18)

I'm setting up an NFS mount on some Ubuntu 18 servers, following these instructions. I have followed all of the instructions and it works when (on a remote) I run mount 10.0.0.7:/mnt/nfs_share /mnt/...
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cannot shh into lxc container even after changing config file

I am using Ubuntu 18.04. I have created an lxc-container called ctn and can log into it by using lxc-attach, ending up as the root user. When running the following with the ip shown by running lxc-ls: ...
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Connect to mongodb replicaset running on docker behing nginx proxy

I'm using docker-compose for mongodb replica set. Everything work fine on my host where docker is running. I had problems when I tried to connect from another client which is in the same network.I ...
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Replica is not syncing with Master in Redis Cluster

created Redis cluster using 6 nodes, 3 masters and 1 replica is working fine but 2 replicas are not syncing, when i checked the log i got following error - MASTER <-> REPLICA sync started Non ...
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Which one is controlling what, Ufw, iptables and webmin

I'm currently running ubuntu 18, iptables, ufw and webmin,and also have ip-persistant installed, but I'm not sure who's in control, because some instructions that's missing in one are in another, and ...
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How to stop apt-get using /tmp for install scripts

I have a CIS-benchmark-compliant base image. Pulling this to differentiate an immutable image for my application, if I attempt to do apt-get install -y docker.io I get an error ==> amazon-ebs: Can'...
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OpenDKIM ignoring hostnames and domains in trusted hosts file

According to http://opendkim.org/opendkim.conf.5.html, the ExternalIgnoredHosts and InternalHosts options support the same format as the PeerList option as follows: The set should contain on each ...

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