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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Start systemd socket on VPN connection automatically after boot

One of my servers is setup so that it will automatically connect to a VPN after booting up using a systemd service. Now I want to host a systemd socket on this VPN connection. And the socket should ...
rollstuhlfahrer's user avatar
3 votes
0 answers
4k views

Using SSH key for install npm module from private repository inside docker

I make container for nodejs project. Inside the project I am using private repository. I need an access to it. For that I am using next Dockerfile FROM node:15 RUN echo "StrictHostKeyChecking no&...
Eugene's user avatar
  • 157
3 votes
0 answers
1k views

Use SNI with pip/pypi on Ubuntu 14 Trusty

pip no longer works on old versions of Python 2, because https://pypi.python.org/ now requires Server Name Indication (SNI), which isn't available in Python 2.7.6, the version of Python that comes ...
Dan Fabulich's user avatar
3 votes
0 answers
671 views

SSH Shell not popping even though the debug log shows it connected

I try to log in to my server using the standard ssh user@host command, and although it technically connects, I'm unable to get a shell. I have used this server for months and I don't understand what's ...
Violet's user avatar
  • 31
3 votes
0 answers
256 views

Single line reverse proxy with HTTP Basic Auth

I am temporarily exposing some HTTP services to the Internet and I would like to password-protect them. Because the exposure is just a few hours, setting up Nginx, Traefik or other heavy-weight ...
Mikko Ohtamaa's user avatar
3 votes
0 answers
4k views

MySQL 8 InnoDB taking a long time to start

I upgrade some month ago from Ubuntu 18.04 to 20.04. So MySQL upgrade from 5.7.33 to 8.0.23. I notice after the upgrade that MySQL is slow to start. 2021-02-24T09:20:16.972632Z 0 [System] [MY-013172] [...
Inglebard's user avatar
  • 163
3 votes
0 answers
221 views

Prometheus not monitoring all EC2 instances of a region

I have set up Prometheus for the monitoring of my AWS EC2 instances, but the issue is taht Prometheus is showing up only 1 instance, however in my AWS instance account there are 2 instances running. ...
huzaifa224's user avatar
3 votes
0 answers
2k views

Cannot start opendkim service, but command line works fine

Good morning.. I've read about 15 different guides on setup with DKIM and Sendmail signing on ubuntu 18.04 and for some reason I cannot get the service to start, yet command line works fine /etc/...
Dennis's user avatar
  • 31
3 votes
0 answers
1k 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 ...
Axel Benitez's user avatar
3 votes
1 answer
3k views

virt-install Couldn't find hvm kernel for Ubuntu tree

I'm trying to create a VM using KVM and virt-installer. When i use virt-install I get the following error: Starting install... Retrieving file .treeinfo... ...
Plee's user avatar
  • 131
3 votes
2 answers
7k views

I have to manually restart winbind.service after every reboot. Ubuntu 18.04

S.O. Ubuntu 18.04.4, Samba version 4.7.6-Ubuntu I have this problem with this machine. Whenever the system restarts, winbind.service fail to start properly, and error "clock skew too great" is ...
giorgiline's user avatar
3 votes
0 answers
639 views

Old administrator password of LDAP still working after it has been changed

I have a LDAP server in an Ubuntu machine which I browse using Apache Directory Studio. I just changed the administrator password by going to cn=admin and changing userPassword. However I noticed that ...
user avatar
3 votes
0 answers
4k views

Load testing throws Server 502 error: Bad Gateway after 700 users. Gunicorn, Gevent, Nginx, Django

I'm trying to reach 2000 concurrent users with my benchmarking tool. I'm using locust to simulate them. My server has 24vCPUs, 128GB RAM, 25SSD. I want to be able to serve 2000 concurrent users ...
Tony Kyriakidis's user avatar
3 votes
0 answers
1k views

Ubuntu kernel boot arg `ip=` not honored; can't determine why

I have a machine with two network interfaces. See below (context) for setup... My boot params look like: set i ${net0/ip} set ns 192.168.99.101 set t tftp://${ns}/pxelinux.cfg set h http://$...
Jim's user avatar
  • 355
3 votes
0 answers
1k views

Cannot delete php/sessions folder

I could really use some help. I have a Ubuntu 14.04.6 account with DigitalOcean and am encountering some errors related to lack of space. When I ssh into the account and do a tab-completion at the ...
TSGM's user avatar
  • 131
3 votes
0 answers
2k views

how to use old MySQL data directory for a new MySQL installation

I have my Mysql data in a EBS volume in aws, I need to point my Mysql to point to that directory instead of /var/lib/mysql. These steps i followed by this doesnot change the datadir sudo systemctl ...
The Keeper's user avatar
3 votes
0 answers
1k views

What means "Invalid cross-device link" error message inside a Jenkins Docker Pipeline?

I'm trying to setup the software tests inside Jenkins for a legacy project at work. In order to run those tests i need to setup a Docker container based on an old ruby version having several packages ...
Jan Peter König's user avatar
3 votes
1 answer
776 views

fail2ban not banning on Ubuntu 19.04

I configured a jail for a PHP application login page, but failed login attempts: stephane@example:~$ tail -400f /home/stephane/dev/docker/projects/common/volumes/logs/php_error_log [15-Oct-2019 12:15:...
Stephane's user avatar
  • 227
3 votes
1 answer
4k views

Wireguard: packets returning from server are dropped

I set up wireguard by now on one server (with NAT enabled) and on a client (ubuntu). When I don't route all the traffic via the tunnel everything works. As soon as I start routing all the traffic ...
Johannes Mueller's user avatar
3 votes
0 answers
3k views

No internet access through L2TP/Ipsec using Ubuntu 18.04 - Routing table

I have set up a VPN network using the package https://github.com/nm-l2tp/NetworkManager-l2tp. The VPN works well (on certain situations) but I think there's a problem with the routing. When I'm not ...
Jelther Gonçalves's user avatar
3 votes
1 answer
3k views

IPv6 default route is removed after net.ipv6.conf.all.forwarding is set to 1

I see the ipv6 default router is gone when I set my ubuntu VM to forwarding IPv6 packet. Below is the snippet when I spin up my ubuntu VM: tester@myubuntu:~$ ip -6 route 2001:420:293:242d::/64 dev ...
Kintarō's user avatar
  • 181
3 votes
0 answers
1k views

nvidia-smi must be run by root before it can be used by regular users

On a newly built Ubuntu 16.04 machine, running nvidia-smi fails as a regular user $ nvidia-smi NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. Make sure that the latest ...
hanxue's user avatar
  • 1,397
3 votes
0 answers
2k views

USB network adaptor (tethered mobile) not automatically activated

On a fresh installation of Ubuntu desktop (ubuntu-18.04.2-desktop-amd64) connecting an Android phone and enabling USB tethering automatically brings up a DHCP configured network adaptor: ifconfig ...
MarcF's user avatar
  • 213
3 votes
1 answer
3k views

Run Systemd Service Unit After AWS EBS Volume Mount

I launch m5.large (nitro-based) EC2 instance from Ubuntu AMI and attach EBS volume. There is systemd as a default init system. As AWS documentation "Making an Amazon EBS Volume Available for Use on ...
Tensho's user avatar
  • 131
3 votes
0 answers
1k views

Openstack Error: No valid host was found. There are not enough hosts available

As a purpose of testing, I am trying to spin up instances of large size, I mean of 8 vCPU's and greater than 20 GB memory, with 50 GB storage. Physical host has 48 GB RAM and 16 CPU. But everytime ...
serverstackqns's user avatar
3 votes
0 answers
4k views

Dnsmasq unable to resolve local host

I'm unable to get my local DNS server to work and totally stumped. Here's what I have done so far to make it work... Dnsmasq configured on Ubuntu 18.04 ( Static IP: 192.168.1.100) /etc/resolv.conf ...
Geary's user avatar
  • 41
3 votes
0 answers
2k views

L2TP ipsec using network-manager-l2tp and strongswan ubuntu 18.04

The VPN works flawlessly on OSX and Windows 10 but no luck with ubuntu VPN gets connected on ubuntu using Phase1 Algorithms : 3des-sha1-modp1024 Phase2 Algorithms : 3des-sha1 And in 10 seconds ...
f4r4's user avatar
  • 133
3 votes
0 answers
533 views

Puma + Nginx permission denied on files that don't exist

Getting an error in the nginx logs: [error] 6193#6193: *1 open() "/home/ubuntu/app/assets/bootstrap.min-2e2a039f4eb020ba4438b6e2ad6a83748c14257a60f68facd2d72df75c452969.css" failed (13: Permission ...
user58446's user avatar
  • 141
3 votes
0 answers
671 views

kworkerds process using up all the cpu - ubuntu

Screenshot I have this weird process using up the all the CPU. I kill it and it gets restarted again. Not sure what's going on here and how do I proceed further. We have solr, apache and mysql ...
Ankit's user avatar
  • 131
3 votes
0 answers
197 views

Preventing Ubuntu EC2 server locking up with high CPU

I have a server that runs celery tasks. It runs a couple of worker threads with celery multi start 2, configured using systemd. Sometimes, it gets overworked and hits 100% CPU. When this happens, ...
user31415629's user avatar
3 votes
1 answer
11k views

Problems with setting up bonding on Netplan (Ubuntu server 18.04)

I have a dual port network card that I want to bond both ports and balance the traffic between ports. I want 1 static IP address. I used to ubuntu 16.04 and this worked fine. Im now trying to set ...
Craig Armitage's user avatar
3 votes
1 answer
920 views

Has anyone had trouble deploying Azure VM using Ubuntu 18.04 after March 8th?

I have a template based deployment that deploys our dev, staging, and production environments. This template has been working just fine since mid February. When I attempted to deploy the dev site ...
CarComp's user avatar
  • 131
3 votes
0 answers
1k views

Can't use Intel Quicksync(headless) for transcoding

/dev/dri and /usr/lib/dri doesn't exist. vainfo returns: error: can't connect to X server! error: failed to initialize display Aborted lspci | grep VGA returns: 00:02.0 VGA compatible controller: ...
Yahvav's user avatar
  • 31
3 votes
0 answers
107 views

How to know which program is modifying iptables?

I noticed at some random time, my iptables rules se flushed, or not matching what I set up. I'm the only user of this server, so it is not another user but it is another program I guess. How to know ...
Zegorax's user avatar
  • 31
3 votes
1 answer
774 views

Hosting multiple websites (Apache Virtual Hosts), Postfix settings for sending mail FROM those domains?

I am not sure that this was the right solution in the first place but I have Postfix up and running on my Ubuntu VPS with G-Suite using relayhost = [smtp.gmail.com]:587 Mail is delivering fine, ...
Jesse's user avatar
  • 31
3 votes
0 answers
181 views

Desktop notifications for failed cron jobs on Ubuntu/Unity

How can I receive notifications of failed cron jobs via my Unity desktop environment? The age-old solution of having cron send emails is problematic as my ISP doesn't provide an SMTP server, and it's ...
sircolinton's user avatar
3 votes
2 answers
847 views

Loopback interface is renamed to rename1

On my Ubuntu 17.04 Server the Loopback Interface keeps beeing renamed to "rename1" during boot (Syslog: rename1: renamed from lo). I tried to disabling renaming by editing grub.conf: ...
mjr's user avatar
  • 31
3 votes
1 answer
466 views

Trailing slashes with nginx and shiny server

Trying to get Shiny apps to load without using trailing slashes. Here is my sites-enabled server { listen 80 default_server; listen [::]:80 default_server; root /var/www/html; index ...
Michael's user avatar
  • 31
3 votes
1 answer
2k views

Ubuntu 16.04 server is listening but not accepting incoming requests

I recently upgraded my server from Ubuntu 14.04 to 16.04. The upgrade seemed successful (so I'm not sure if it's related) but about a week in I restarted the host and it now will not accept remote ...
Godwin's user avatar
  • 401
3 votes
0 answers
2k views

Ubuntu 16.04 Systemd not possible to use systemctl

I have a Ubuntu 16.04 server, since the last restart, systemctl doesn't work anymore. For example if I want to start the nginx, I get the following error: root@SERVER:/# systemctl start nginx ...
ghovat's user avatar
  • 131
3 votes
0 answers
8k views

SSH fork of unprivileged child failed on connection

we have some problem when we try to make an ssh connection to our server. When we connect with user X (ssh x@serverIP) we receive these errors on console: Connection to serverIP closed by remote ...
zell147's user avatar
  • 31
3 votes
1 answer
862 views

Reverse Proxy nginx not serving subdirectories

This is very strange and I can't get my head around it. I have set up a nginx server to reverse proxy a docker container. Nginx seems to be able to server some pages, but not sub-directories, or ...
Ulukai's user avatar
  • 919
3 votes
0 answers
2k views

How do I get Prosody to use TLS 1.2?

I have Prosody running on my Ubuntu 14.04 LTS server. I have OpenSSL 1.01f installed, which is confirmed by running openssl version. TLSv1.2 is supported and confirmed by running openssl ciphers -v '...
jeff1234567890's user avatar
3 votes
0 answers
1k views

why does nginx need to be restarted?

Ubuntu 16.04 starts nginx on boot. It's configured to proxy several dev websites on localhost. These sites are not running when nginx starts the first time. If I start the websites and browse to ...
Michael Cole's user avatar
3 votes
0 answers
1k views

Kernel modules won't load for NFS/RoCE Ubuntu 16.04 with latest drivers/software

I'm having trouble with NFS over RoCE on Ubuntu 16.04 using the latest OFED package provided be Mellanox (MLNX_OFED_LINUX-3.3-1.0.4.0-ubuntu16.04-x86_64.tgz). My cards are Mellanox 10Gbe and are RoCE ...
Ryan Babchishin's user avatar
3 votes
0 answers
3k views

Mount CIFS-share with users Kerberos-Ticket

we want to mount shares through autofs. Nothing special we thought. But: this must be done in some complex active directory circumstances. What we have: integrated Ubuntu 14.04 workstations on which ...
cbuchey's user avatar
  • 41
3 votes
0 answers
2k views

Block Bad Bots in Nginx for Multiple Sites

I need to block a bunch of robots from crawling a few hundred sites hosted on a Nginx web server running on a Ubuntu 16.04 machine. I've found a fairly simple example here (important part of the ...
Sledge Hammer's user avatar
3 votes
0 answers
4k views

Trouble with cloud-init user-data on Ubuntu on vSphere

I feel like I must be missing something obvious here. So I'm hoping someone can tell me why I'm being dumb before I try to submit an official bug report. I recently downloaded the OVA version of the ...
Ryan Bolger's user avatar
  • 16.8k
3 votes
0 answers
2k views

Authentication vsftpd account using remote LDAP user

I'm trying to authenticate vsftpd from LDAP logins which hosted remotely another server . vsftpd hosted on Ubuntu 14.04.2 LTS (GNU/Linux 3.13.0-48-generic x86_64) amazon aws . from the LDAP server ...
Ruwan Ranganath Senarathne's user avatar
3 votes
1 answer
2k views

Docker DNS not working

I'm on ubuntu 16: I have a server running a docker container with Bind9 that works as my network DNS server at 192.168.3.70. All the hosts from my network use this as DNS and it works great. I have ...
Mike Baranski's user avatar

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