Questions tagged [ubuntu-16.04]

Ubuntu 16.04 - named "Xenial Xerus" - is a Long Term Support (LTS) release of Ubuntu Linux. Officially released on April 21, 2016, it was supported for 5 years. Extended Security Maintenance subscriptions are offered by Canonical until April 2024. Only use this tag if your question is version-specific.

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Nginx more_set_input_headers throwing an error

i am running Ubuntu 16.04.2 LTS. i am trying to upgrade my Nginix from nginx/1.10.3 to nginx/1.21.0. when i run the upgrade and test the configuration file i get the below error root@myserver:/home/...
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Ubuntu 16.04. Rebooted no logs [closed]

My server which was up since last 6 months got rebooted today. Unable to know the reason so far. Checked the following... last reboot shows "reboot system boot 4.14.0-generic" /var/log/...
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Ubuntu 16.04 network almost comes to a halt after a few weeks

I have an Ubuntu 16.04 server that acts as Jenkins node and also runs docker with several images/containers. The server works well for weeks, but then network transfer gets extremely slow. For example ...
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Naemon still sending DOWN notifications for removed host

I shutdown an old web server, and immediately started receiving DOWN notifications from Naemon. Now I have removed that host entirely from the Naemon config, and restarted the Naemon service. Yet I ...
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KVM stuck in boot loop

I have a server here, running Ubuntu 16.04 and libvirt 4.0.0. It is hosting a single KVM, a Jenkins Server. This server however is stuck in a boot loop after it was shut down for maintenance. I cannot ...
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how to find bad scripts or unwanted processes on an compromised ubuntu server [duplicate]

I got a message from my provider that my server (hosted virtual server) is obviously abusing other servers. Someone complained to receive lots of traffic from my server. It is now on me to find out ...
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apt-offline directory and upgrading from 16 to 18

I followed this: https://www.debugpoint.com/2021/03/how-to-update-or-upgrade-ubuntu-offline-without-internet/ I'm trying to test an offline upgrade from Ubuntu 16 to 18. The "offline-data-dir&...
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How do I fix issue with renewing my certbot certificates on ubuntu

I am trying to renew my certbot certificates running the command cerbot renew and I get this error 2021-12-02 10:46:30,686:INFO:certbot.plugins.selection:Plugins selected: Authenticator nginx, ...
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Check script running by Apache by PID

Via HTOP I detect some Apache scripts running (www-data /usr/sbin/apache2 -k start) for a long time, or even using a lot of CPU. In some cases these scripts are the cause of database congestion and/or ...
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Make gnutls-cli print local root certificate as well as server-provided certificates

I'm diagnosing a TLS certificate verification problem in Ubuntu Xenial that resulted from the recent Let's Encrypt root certificate expiration. The problem happens in cURL which uses GnuTLS under the ...
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Can't SSH from host to VM through static IP

I'm setting a cluster of servers with ubuntu 16.4 VM's to learn about it. As suggested by some tutorials, I set a static ip for each machine besides DHCP one (2 network interfaces). To achieve that I ...
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Ubuntu Server Syslog is cluttered with apparmor="DENIED" operation="open" profile="snap.net-snmp.snmpd"

Is there anything to worry? If not, how to stop these logs? audit_printk_skb: 39 callbacks suppressed Sep 27 06:27:02 Servername kernel: [7575458.811518] audit: type=1400 audit(1632713222.554:17386376)...
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blacklisting download from sftp for a single user

I need to create a user that can use ssh, but not download files through sftp. I've googled a lot, and had try a lot of configurations, but none of them work. So I think the only way to do it, it's ...
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route two interfaces that has ip of two different subnet

Yes I know it's a duplicate of many questions but I can't find my solution to them. I have a host virtual machine (ubuntu 16.04) that has two network adapters. one of them is connected to the gateway(...
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Can I install php8.0 on Ubutnu 16.04

I'm trying to install php8 on Ubuntu 16.04.5 LTS. Here is the list of commands and output that I ran: apt-get update apt install software-properties-common --- these commands went fine when ran add-...
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Something keeps deleting /etc/apache2/mods-available/php7.load and restarting Apache2

I have an old box co-hosted in a VPS setup that I have no control over. It's an old kernel; 2.6.32-042stab145.3 and an old Xenial, Ubuntu 16.04.7 LTS. These things I can't change. I know it's end of ...
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ipsec duplicate policies: allow and block

I'm trying to set up u IPsec connection between two virtual machines using Strongswan. The configuration on my first machine is the following (ipsec.conf): conn %default ikelifetime=60m ...
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DNS bind9 server failure after forwarding

I'm setting up a dns server in a vm with Ubuntu 18.06 for school and I encounter strange behaviour when forwarding a request which my server is not authoritative for. My server asks the dns server in ...
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iptables-restore fails in GKE with error: iptables-restore v1.6.0: Bad IP address ""

GKE Cluster: Get into a pod (kubectl exec -ti ha-77lgb bash). root@gke-ha-pool-1-10438716-b5wj:/home# iptables-save > /tmp/iptables-save.txt root@gke-ha-pool-1-10438716-b5wj:/home# iptables-...
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Why is sendmail only logging internal messages to /var/log/mail?

I'm pretty sure that in the past my sendmail (triggered from PHP) was logging messages sent from PHP to the MTA and also MTA to the recipient. Although emails are received by the recipient and I can ...
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How to use 1 ip to receive connections, and another to establish connections

I have a VPS with 2 usable IP addresses. I would like to use one of them to receive connections on, and use the other when the server is establishing a connection. So if the starter of the connection ...
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Ubuntu set hostname via hostnamectl with multiple virtual hosts

I would like to set the hostname of my Ubuntu 16.04 to a FQDN, as I plan to install Postfix server. However I have multiple domains hosted in the web server via Apache2 virtual hosts. For example: ...
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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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How to troubleshoot a systemd timer on Ubuntu 16.04 that won't re-schedule every minute as expected?

I have an existing systemctl target that was originally (by default installation) scheduled to run everyday, almost continuosly with just a pause of 30 seconds between the end and beginning of each ...
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/etc/ directory overwritten by mistake in Ubuntu

I've a running (installed fresh) Ubuntu 16 server. By mistake I've overwritten /etc/ directory with old backup of earlier server. As of now all seems to be working fine, unless some server(Postfix, ...
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Why am I no longer able to reconnect to remote server

I worked fine on a remote server (ubuntu-16.04), and when I ran the command from https://github.com/ubuntu/microk8s/issues/408 to fix a bridging problem in microk8s (kubernetes) I fell into a bigger ...
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Websocket connection delay from Mobile App to Ubuntu 16

I've customers with Android mobiles with my app which forwards selective SMS to a Nodejs based Websocket server on Ubuntu 16. I've two set of customers and another similar Ubuntu 14 with similar app ...
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Dell server with NIC that won't show link up

I have a dell server (PowerEdge R330) and I have just tried to liven up the second on board NIC. idrac says it is connected as does poking into the lifecycle setup on boot but ethtool says it isn't ...
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SFTP hangs when listing a large directory from a Windows Server 2012R2 VM

I have two machines on the same ethernet network segment: VM running Windows Server 2012R2 [sftp client] Physical server running Ubuntu 16.04.7 LTS [sftp server running openssh-server 1:7.2p2-...
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ODOO 10 Page wasn't loaded completely

Since a few days I can't access my ODOO instance from the external network. The home page doesn't load completely if I use a public IP address, only the logo loads. I searched in google and I found ...
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Daily cron running, But can't find file

I wrote simple shell script for backup mysql and send it to my email few months ago, It works very well even now, I can get packed sql file on my mailbox everyday. Today I am going to change mail ...
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ufw blocking certain traffic on web server that ought to be allowed

In an Ubuntu 16.04 machine hosting an internet-facing web application, my /var/log/syslog is being flooded by messages of the sort: Jan 9 17:41:50 ip-172-31-11-100 kernel: [483324.699896] [UFW BLOCK] ...
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Why apache2 ocuppied too many memory and took a long time to release the memory?

I have installed ubuntu 16.04 with 16GB Memory and 8 CPU. When I start an apache program, it occupied lots of Memory and took long time to release. For example, start the program first time, the ...
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EC2 cannot access to EFS

Our website has mounted on 4 EC2 and 1 EFS. Sometimes EC2 servers cannot access to EFS. When I run commands like cd and ls, they are not responding when access is not available. When I restart the ...
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Set the limit of sent / received packets

My vps server provider limits me to 50,000 packets per second. After exceeding the number of packets, the link speed slows down to 1Mbit / s. Is it possible to set the ubuntu system not to exceed 50,...
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Can access ssh, cannot access from browser

straight to the question, i was been provided a server by our clients with ip x.x.x.x port 2215 to access it by ssh. Therefore i upload all my website to /var/www/html folder. Because i lack of ...
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NFS mount on housing user home shares not mounting on Ubuntu 16.04

The issue I am trying to resolve is a bit of a head-scratcher. I say that because the issue is consistently inconsistent and not happening on all of the Ubuntu 16.04 VMs that are hosted in our ESXi ...
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Apache status "150 requests currently being processed, 0 idle workers"

My Apache Server Scoreboard Status is as shown below when the "150 requests currently being processed, 0 idle workers" condition is hit. --Log-trace--- Apache Server Status for localhost (...
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Apache | redirect with Self-Signed SSL Certificate not working

OS: Ubuntu 16.04 I'm trying to enable a self-signed certificate for apache. I already created the certs with the following command: sudo openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout /...
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How to run updates on Ubuntu command line without upgrading PHP

I run an Ubuntu server on 16.04 using LAMP stack. I ran into an issue last week when updating using: sudo apt update Basically PHP was automatically upgraded from 7.4 to 8.0 during the upgrade &...
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How to disable Sendgrid mail relay on Postfix

I have a Sendgrid account, and have setup Sendgrid to work with my Postfix mail server. However, I would like to disable Sendgrid as a mail relay. I followed this article to set up: https://serverok....
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BigBlueButton getting unusaul traffic

We are running a bare-metal server which can handle 400 concurrent video conferencing users. We are using BigBlueButton application for video conferencing. It was running smoothly for the past 6 ...
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Ubuntu 16.04 server loses default route on restart

One of my Ubuntu servers always loses its default route when restarted. I have a second server which has an almost identical set up which works fine. I am not sure when the problem started but it ...
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ubuntu only use 8 cpu for RX and TX queue with vmxnet3

I installed Ubuntu 16.04 on vmware esxi 6.7 with 32 core cpu for this machine. Linux only run 8 queue for tx and rx and it cant use all cpus in heavy load. # ethtool -S ens192 | grep Queue Tx Queue#: ...
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-2 votes
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2 address on 1 server dont ping

enter image description here ifconfig enter image description here interface I have a problem, I would like to add 2 addresses to my server, but when I add it to interfaces, it shows up in ifconfig ...
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Cleaning and upgrading legacy infrastructure

I am a fullstack engineer in a small company, and I am responsible for everything related to technology, from infrastructure, to code. I arrived a few months ago, and quickly realised that there were ...
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When does ZFS "autoreplace" take effect?

Background autoreplace is documented like the following: autoreplace=on | off Controls automatic device replacement. If set to "off", device replacement must be initiated by the ...
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MySQL shows lot of connections

I checked my MySQL process list using "show processlist;"and it is showed nothing, But I used "show status like 'Conn%';" to check the connections and it is showed me around 9K ...
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Trying to Install Kubernetes with Vagrant and Ansible on Ubuntu 16.04 lab

So I am trying to install Kubernetes on a lab with Vagrant and Ansible. I am using the following documentation on Ubuntu 16.04: https://kubernetes.io/blog/2019/03/15/kubernetes-setup-using-ansible-and-...
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Get rid of content ripping bots in a Rails 4 app served by Nginx using Passenger on Ubuntu 16.04

Our rails app is being inundated with requests from bots that are trolling using IP addresses. Every request results in an exception notification error message. Our original Nginx server block: server ...
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