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.
37
questions
14
votes
2
answers
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switch apache from prefork to event in Ubuntu 16, get php 7 working
Apache was running slow in production. After searching for answers for some time, I finally went to #apache IRC channel and the pros had me check the apache mode with this command:
sudo apachectl -V
...
- 516
15
votes
1
answer
37k
views
Disabling rp_filter on one interface
I have an Ubuntu 16.04 Server which is acting as a router with multiple (VLAN) interfaces. By default, rp_filter (reverse path filtering) is enabled for all interfaces. I want to keep it that way, but ...
- 422
1
vote
2
answers
4k
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Docker service not able to start anymore because of modprobe error
I just ran in some issues with my server running docker that I cannot fix myself. Im using Docker version 18.09.0, build 4d60db4 with Ubuntu 16.04.5 LTS. During the day I noticed, that my docker ...
12
votes
3
answers
6k
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Automatically mount SSD instance storage on AWS EC2 in Ubuntu 16.04
I am using an Ubuntu 16.04 EC2 from AWS on c5d.2xlarge HW. It comes with a 200 GB SSD called /dev/nvme1n1.
I am able to mount this drive using:
$ sudo mkfs.ext4 -E nodiscard /dev/nvme1n1
$ sudo ...
- 123
11
votes
3
answers
20k
views
Why is ALPN not supported by my server?
I'm currently running a Ubuntu 16.04.1 LTS server using NGINX 1.11.9 and openssl 1.0.2g.
According to everything I've read, these versions should support ALPN, yet when I run a test on KeyCDN's HTTP/...
- 401
11
votes
2
answers
12k
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varnish daemon not listening on configured port
I'm trying to install varnish on ubuntu 16.04,
I read several article none are working.
From what I read, since ubuntu 15.04, the way of configuring varnish has changed (because of systemd).
Now on ...
- 213
8
votes
3
answers
25k
views
How to enable and use the serial terminal of a HP Microserver Gen9?
I have a HP ProLiant Microserver Gen9. It has HP ILO version 4, but the Java based Remote Console doesn't work reliably and I can't use it after the POST screen in the free version of ILO (asks me to ...
- 788
6
votes
1
answer
11k
views
SSL_ERROR_RX_RECORD_TOO_LONG certbot
I have the following setup:
Apache 2.4
Ubuntu 16.04 LTS
letsencrypt / certbot
Now, as soon as I enable the following .conf on the default server, all my configured top level domains receive a ...
- 63
6
votes
4
answers
11k
views
Non-interactive (silent) install of MySQL 5.7 on Ubuntu 16.04 LTS
MySQL 5.7 (5.6+ actually) changed how mysql_secure_installation works. This made it hard to find a working, silent, scripted install for Ubuntu 16.04 LTS. How would you install MySQL securely in a ...
- 223
5
votes
1
answer
11k
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How to determine the cause of stuck `D` status processes?
I have several processes stuck on uninterruptible sleep statuses, all seemingly stemming from auplink /var/lib/docker/aufs/mnt. It's something docker related and it's waiting on an I/O that will never ...
- 127
3
votes
1
answer
3k
views
Using Apache rewrite rules in .htaccess to remove .html causing a 500 error
I have written a small website (4 pages, HTML only) and I want to remove the .html extension from the URL by putting some rewrite rules in my .htaccess file, I've Googled around and found several ...
- 43
3
votes
2
answers
3k
views
Network interface periodically going down with speed changed to 0 kernel errors
Over the last couple of days, the bonded network interface on one of our servers has stopped responding.
Looking through the kernel logs, I notice when the interface goes down, we are getting lots of ...
- 253
2
votes
0
answers
792
views
Certbot renew running but not renewing
I've installed certbot on an Ubuntu 16.04 host using the PPA.
I can see that the certbot timer is configured to run and that it's running:
jaraco@punisher:~$ sudo systemctl status certbot
● certbot....
- 999
2
votes
1
answer
946
views
Installing gitblit GO as service in Ubuntu Server 16.04
I got a new server with ubuntu 16.04 and installed gitblit GO.
extracted it to /opt/gitblit/
created user and group glitblit
gave rights to user: chown -R gitblit:gitblit /opt/gitblit
called install-...
- 141
2
votes
2
answers
1k
views
Static route in initramfs
My hosting provider unfortunately requires the use of static routes for network configuration (gateway is on a different subnet than the host IP). For that purpose I added the following lines to the ...
- 21
2
votes
2
answers
657
views
VM becomes slow after some days of runtime with 48 GB of RAM, not with 6 GB
I'm dealing with a problem for some weeks now which results in a very slow VM-guest after the VM ran for some days.
"slow" means that CPU-bound operations take more time than before and as well that ...
2
votes
1
answer
4k
views
VPN server using StrongSwan "no matching peer config found" - what does it mean?
I have an AWS server running Ubuntu that has a pptpd server for VPNs, and many clients with different credentials. It works great. But apparently I'm not supposed to be using that any more, I'm ...
- 135
2
votes
1
answer
4k
views
Various "Config variables" not defined, Apache 2.4.18
I have been setting up a blog/cloud server on Ubuntu 16.04 with Apache 2.4.18 and after rebooting my machine, came across this error.
[Wed Aug 03 01:04:41.468928 2016] [core:warn] [pid 3191] AH00111: ...
2
votes
2
answers
12k
views
Apache failes to start, already running but not maching pid file?
Whenever I try to start/restart my apache2 service using systemctl I get an error about it already running but not maching my pid file.
● apache2.service - LSB: Apache2 web server
Loaded: loaded (...
- 608
1
vote
0
answers
441
views
mysql_secure_installation on Ubuntu 16.04 doesn't set the root pass
I'm upgrading a few mysql (MariaDB) hosts from Ubuntu 14.04 to 16.04 and noticed mysql_secure_installation doesn't seem to set a root password on the DB, even though it prompted me for it.
I changed ...
- 3,624
1
vote
1
answer
4k
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Apache2 Virtual Host auto redirects to https
I have ubuntu 16.04, I have setup virtual host in apache2 mysite.dev in file /etc/apache2/sites-available/mysite.conf
<VirtualHost *:80>
ServerName mysite.dev
ServerAlias *....
- 115
1
vote
2
answers
4k
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PHP-FPM status is empty
I set up pm.status_path = /status option:
ubuntu:~$ cat /etc/php/7.1/fpm/pool.d/www.conf | egrep 'listen|status'
listen = /run/php/php7.1-fpm.sock
listen.owner = www-data
listen.group = www-data
pm....
- 179
1
vote
2
answers
5k
views
Trying to confirm is php7.0-fpm is working with apache on Ubuntu 16.04
I configured php7.0-fpm to work with apache on Ubuntu 16.04 but not sure if it is correctly configured and working.
As I understand, after installation and configuration, the output of php info file ...
- 11
1
vote
0
answers
454
views
SSH to a non default port times out over Android hotspot connection
I'm trying to connect to a remote Ubuntu machine using ssh protocol. My local OS is Ubuntu 16.04 and the remote OS is 18.04. My local machine is connected to my Android 5 over shared hotspot ...
- 111
1
vote
1
answer
381
views
Replacing root filesystem with EC2 snapshot
This documentation describes "Restoring an Amazon EBS Volume from a Snapshot".
Having done that this documentation explains "Making an Amazon EBS Volume Available for Use on Linux"
What I'd now ...
- 253
1
vote
1
answer
28k
views
SSH error: ssh_dispatch_run_fatal: Connection to 192.168.x.x port 22: DH GEX group out of range
I have a problem with SSH. I can not ssh into a server because of DH GEX group out of range
My ssh version:
OpenSSH_7.2p2 Ubuntu-4ubuntu2.4, OpenSSL 1.0.2g 1 Mar 2016
I tried to ssh into a ...
- 13
1
vote
1
answer
185
views
Why does my VM become slower during CPU-heavy tasks after some days of runtime?
I'm dealing with some strange problem for some time now: After some days of runtime, one of my VMs seems to become slower on CPU-heavy tasks. One example were this happens is reading virus signature ...
1
vote
2
answers
585
views
Whats is the best user to manage webserver? [duplicate]
In Apache webserver I have user www-data, and all files in /var/www are owned by www-data. Isn't that for security? Sometimes I need to upload files via FTP to /var/www/*, but with my own user I don't ...
- 21
1
vote
4
answers
2k
views
apt-get not working with iptables
I installed iptables and configured to my needs. The problem is that apt-get is not working anymore. Here are my Iptables (iptables -L -n):
Chain INPUT (policy DROP)
target prot opt source ...
- 13
1
vote
1
answer
14k
views
How to monitor services with SNMP?
I want to monitor the status of several services via SNMP.
The manpage says:
proc NAME [MAX [MIN]]
monitors the number of processes called NAME (as reported by "/bin/ps -e") running on ...
- 507
1
vote
2
answers
6k
views
Ubuntu Postfix: Mail loops back to myself and host greeted me with my own hostname
my main.cf:
smtpd_banner = $myhostname ESMTP
biff = no
append_dot_mydomain = no
readme_directory = no
smtpd_use_tls = yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
...
- 13
0
votes
3
answers
434
views
Why can't systemd find service files within a BTRFS subvolume within a BTRFS root file system?
I've installed Ubuntu 16.04 LTS Server using BTRFS and got the following setup according /etc/fstab:
# <file system> <mount point> <type> <options> <dump> <pass&...
0
votes
2
answers
834
views
Use non default route as non privileged user
On Ubuntu 16.04, the default route for IPv4 is an interface other than eth0.
If I try to
curl -vvv --interface eth0 v4.ifconfig.co
I get
* SO_BINDTODEVICE eth0 failed with errno 1: Operation not ...
- 1,857
0
votes
1
answer
3k
views
Ubuntu versions and using apt-get for SNMP mib downloader
I am running Ubuntu 16.04.5 LTS, which I believe slightly pre-dates a fix to some issues with the SNMP MIBs installed by the snmp-mibs-downloader. I'm trying to understand whether I can use apt-get to ...
- 295
0
votes
1
answer
81
views
How to get SSL on a service?
I'm building a website which uses a routing (as in street nav) service which I'm running on a seperate server on port 8002 (running ubuntu 16.04). (Github link to the router project)
The website ...
0
votes
0
answers
2k
views
Emails bouncing - 454 TLS not available due to temporary reason
I'm trying to work out why I've started getting emails bounced back to me:
Delivery incomplete There was a temporary problem while delivering
your message to mail@educationusingpowerpoint.co.uk. ...
- 1,102
-1
votes
1
answer
6k
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WordPress does not execute PHP file
my main WordPress page shows:
<?php
/**
* Front to the WordPress application. This file doesn't do anything, but loads
* wp-blog-header.php which does and tells WordPress to load the theme.
*
*...
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