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.

2,973 questions with no upvoted or accepted answers
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315 views

How can I prevent clients from communicating with each other when setting up and OpenVPN server?

I'm trying to configure my OpenVPN server (Ubuntu 16.04) such that clients cannot communicate with any other device except for the OpenVPN server itself. I've tried removing client-to-client from my ...
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2k views

Ubuntu KVM - Can't access network through bridge from guests, no DHCP, no ping

I have a laptop running Ubuntu 16.04.3 LTS graphical (so has Network-Manager et al installed). I think I've got KVM and QEMU installed correctly. When trying to set up a Debian VM from the netinstall ...
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3k views

OpenVPN error status: 2, and can't connect to internet while running openVPN

I recently installed openVPN and configured it with my client1.ovpn file: client dev tun proto udp remote 10.8.0.1 1194 resolv-retry infinite nobind user nobody group nogroup persist-key ...
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107 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 ...
2
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0answers
447 views

SATA port multiplier connected disks performing poorly

I have three disks making up a RAID-Z vdev in a zfs pool on Ubuntu Server 16.04.2 which are connected via a cheap PCIE SATA card, a single eSATA cable, and a port multiplier at the other end. iostat ...
2
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1answer
642 views

Can Suricata be used as an effective IPS on a single server?

I've been looking for an effective intrusion prevention system (IPS) for an Ubuntu 14.04 server, something like what Symantec or F-Prot might offer for a Windows server. I've contacted major ...
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527 views

Ubuntu KVM virsh console domain connects, but does not load console

I installed a copy of Ubuntu 17.04 using virt-install, on my server (non desktop). sudo virt-install --connect qemu:///system -n wiki -r 4096 --vcpus=2 -f /dev/mapper/vgpool-wiki --network=bridge:br0 ...
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554 views

Installing Solr 6.5.0 on Ubuntu 16.04; can't access admin UI

I am trying to install Solr on an Ubuntu server. I followed this guide: https://www.howtoforge.com/tutorial/how-to-install-and-configure-solr-on-ubuntu-1604/ Everything appeared to work, except I ...
2
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0answers
430 views

ssh not connecting and no error in verbose mode

I can't ssh from any machine to one of our servers (in the same network). I try to run ssh in verbose mode but do not get any error : vincent@feed01:/var/cache/feed$ ssh -vvv vincent@feed02.xxx.com ...
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140 views

user policies on Ubuntu Server

I have installed Ubuntu Server 16.04 on a test server. Now I want to try to make user-policies work on that server so that I can control which users can use which software on the server. Can I do ...
2
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1answer
326 views

What is limiting bandwidth using rsync

we are running a 10Gbit server. Testing whith iperf works perfect: [ 3] 0.0-10.0 sec 10.6 GBytes 9.15 Gbits/sec But when using rsync (with ssh on another port: rsync -Pe 'ssh -p xxx') the ...
2
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1answer
333 views

NGINX redirect HTTPS partially works

I try to reddirect all my traffic on https. I use AWS, passenger + NGINX . So far with my smartphone ( android ) , chrome last version : http://server_name.com redirect to https... at home on my ...
2
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1answer
726 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 ...
2
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0answers
202 views

Why is Ubuntu's default PHP 7.0.13 almost twice as fast as ppa:ondrej/php PHP 7.0.15?

So my intent was really to benchmark how our current app generates reports on php5, php7, and php7-fpm. I did this by launching a 2gb instance on DigitalOcean with Ubuntu 16.04 and installing apache2 ...
2
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0answers
390 views

Will Ubunut 14.04 LTS update OpenSSL to 1.0.2 after EOL of 1.0.1

According to OpenSSL, the version 1.0.1 has reached EOL: https://www.openssl.org/policies/releasestrat.html Which means: Support for version 1.0.1 will cease on 2016-12-31. No further releases ...
2
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1answer
643 views

Connect to X Windows with username with spaces

I have an Ubuntu server 16.04.01 LTS, which I want to use as desktop for remote users connecting from thin clients and via RDP from Windows machines. For Ubuntu-local users, this works, I can connect ...
2
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1answer
2k views

nginx - CORS configuration that allows files to be served to localhost?

Here is my current nginx configuration file: server { listen 80 default_server; listen [::]:80 default_server; root /var/www/html; # Add index.php to the list if you are using PHP index index.html ...
2
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1answer
29 views

mpool_malloc error, cannot access shell

I'm getting spammed the following error on boot: LibClamAC Error: mpool_malloc(): Attempt to allocate 8388608 bytes. Please report to http://bugs.clamav.net I read that I will need to update... but ...
2
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1answer
2k views

Openvas 9 LDAP Authentication

I am trying to configure Openvas 9 to use LDAP, for the login to the Greenbone software. It appears as based off of other threads, this issue with LDAP in unresolved unless I am seriously mistaken. ...
2
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1answer
264 views

tcp/ip Connection Errors

We have a web-server with 128GB main memory, 32 vCPUs on Ubuntu 16.04. It runs nginx, php-fpm, postgresql, mysql and beanstalkd applications. The web-server gives some connection errors from ...
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0answers
415 views

With Ubuntu livepatch and unattended-upgrades is it possible to run a server fully patched without restarting the server or services or logging in?

A few weeks ago Canonical started offering livepatching for kernel updates without needing to reboot the server ( http://insights.ubuntu.com/2016/10/20/live-kernel-patching-from-canonical-now-...
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700 views

Samba mount is empty when mounted with nounix

For years this has worked and today it stopped. I have a Debian 8 server running Samba 4.2.10 to provide some shares to Windows 10 and Ubuntu 16.04 machines on a LAN. This morning the ubuntu ...
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0answers
937 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 '...
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0answers
48 views

Something is resetting my opendkim files (KeyTable and SigningTable)

Something is regularly resetting my /etc/opendkim/KeyTable and /etc/opendkim/SigningTable files. I have to manually re-edit them and restart opendkim every time... How to find out what is resetting ...
2
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2answers
451 views

Active process swapping despite free memory

For some reason our system starts swapping (actively used memory) at around 60GB used memory. (see edit below, it seems I/O and disk cache usage, even of previously run processes has an effect) ...
2
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0answers
303 views

Static IPv6 settings working on Ubuntu Server, but not on Windows Server

I experience an issue getting IPv6 to work on Windows Server whereas it is working on Ubuntu Server: I have a VServer hosted by netcup.de with one assigned IPv4 (37.120.aaa.bbb) and a IPv6 subnet (...
2
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2answers
532 views

Why does my Ubuntu virtual machine hosted in Hyper-V power on with a date in the future?

I have several Ubuntu virtual machine running within a Hyper-V server. The server is a Windows 2012r2 machine. The Ubuntu VMs are either Ubuntu 14.04 or Ubuntu 16.04 (the current LTS releases). ...
2
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1answer
531 views

After upgradeing gitlab - GUI / Inteface broken - not working correctly

we have a big problem. Since we updated gitlab from version 8.11.7-ce.0 to 8.12.1-ce.0 our webgui is broken: gitlab - broken gui view we currently don't know why this happened. we are using Ubuntu ...
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0answers
194 views

How to encrypt data on an Ubuntu server built on RAID + LVM?

I'm managing a file server with two disks. The server is running Ubuntu 14.04, and it's already configured with software RAID1 (/dev/md0), and LVM on top of it. Important data is stored in /var and /...
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0answers
280 views

Squid3 WCCPv2 with ASA not working

So I have begun the awful adventure of getting Squid 3.3.8 working with my Cisco ASA 5520 (9.1(5)). I think the problem is that the traffic is getting to the squid box but it is either not getting to ...
2
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0answers
251 views

CHECK_NRPE: Error - Could not complete SSL handshake. win2003server

win2003k with nsclinet++ (remote host) 0.4.4.19 and ubuntu 16 serv with nagios (monitoring host). my nsclient.ini [/settings/default] allowed hosts = 127.0.0.1,::1,10.50.133.98 password = 12345 port=...
2
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1answer
452 views

Can't figure out how to automatically set MariaDB root password without user intervention

I'm making a script that installs MariaDB, and I'd like to set a root password. I've got the following in said script: DEBIAN_FRONTEND=noninteractive echo mariadb-server-10.0 mariadb-server-10.0/...
2
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1answer
905 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 ...
2
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0answers
31 views

Protect a second server behind existing OpenVPN

I have an existing Ubuntu server that denies all incoming traffic with a client unless it's able to authenticate with OpenVPN (we use Tunnelblick to manage client connections). However, we have other ...
2
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3answers
2k views

How to install Apache with PHP 7.0 on Ubuntu 16.04 using puppetlabs-apache

I want to install Apache with PHP 7.0 on Ubuntu 16.04 using Puppet Labs Apache module. Following the documentation the module supports Ubuntu 16.04. There is a ticket related with PHP 7.0 support and ...
2
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1answer
2k views

How do I upgrade and keep my ZFS pools on Ubuntu Server?

I have a server running the 4-year-old Ubuntu 12.04 LTS with zfsonlinux installed on the machine with a 1.5TB mirrored drive setup. The Ubuntu 16.04 LTS has no upgrade path, so I'll have to reimage ...
2
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0answers
374 views

502 Bad Gateway Error - exited on signal 11

I have an issue on a particular Magento store, on two different servers. The issue is that when I save admin panels, I get a 502 error. The values actually save to the database, as pressing back on ...
2
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0answers
749 views

Unable to login to MySQL on ownCloud using PHP - SQLSTATE[28000] [1045] Access Denied

I get a SQLSTATE[28000] [1045] Access Denied error every time I try to connect my ownCloud instance to my MySQL database as <user>@localhost. This is on a clean, newly installed copy of Ubuntu ...
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0answers
479 views

Unable to locate package gitlab-ce on Ubuntu vivid

I have Ubuntu vivid and I am trying to install Gitlab. I have tried curl -s https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.deb.sh | sudo bash sudo apt-get install gitlab-ce=...
2
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0answers
84 views

Securing config file containing plain-text passwords only with file-system permissions?

I have read a lot of posts and questions about the safest way to secure your server configuration files, which contain sensitive information, such as passwords. The 3 main recommendations I have found ...
2
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0answers
5k views

Nginx Using KiB of shared memory for push module in

I'm setup nginx with passenger on a ubuntu 14.04 and the nginx is throwing 403 Forbidden error I checked the permissions and it is all ok. I checked the nginx conf and it seems ok user root; ...
2
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0answers
387 views

nfs-kernel-server keeps failing in Ubuntu

I'm trying to create NFS share in Ubuntu 14.04 strictly following this tutorial: https://help.ubuntu.com/community/SettingUpNFSHowTo. root@srv:~# service nfs-kernel-server start * Exporting ...
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0answers
55 views

Ubuntu Network Performance on over 2k connections

I'm using an EC2 c3.8xlarge Ubuntu 14.04 LTS machine with over 3k threads simultaneously downloading web pages one after another. Although this machine should have a 10Gb network performance, I can'...
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0answers
2k views

Ubuntu server 15 during ping (DUP!) what does it mean

For some time during ping 192.168.0.2 I have something like this (DUP!) something is wrong with my network card or switch? Image Ubuntu server 15 - *192.168.0.222* Windows server 2012 - *192.168.0.2*...
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0answers
125 views

After Upgrading to Ubuntu 15.10 from 15.04, EC2 Webservers are Crashing

I have a variety of Ubuntu machines on EC2 running in production, with about 30 that were upgraded from 15.04 to 15.10. With most of the machines, the upgrade went flawlessly and experienced no issues ...
2
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3answers
903 views

Apache exit signal Segmentation fault when mod_rewrite and fcgi are used together

I am using Ubuntu 15.04, Apache/2.4.10. I enabled mod_rewrite and mod_proxy_fcgi. My apache config for fcgi is: ProxyPassMatch ^/(.+\.(hh|php)(/.*)?)$ fcgi://127.0.0.1:9000/var/www/html/myapp/$1 ...
2
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1answer
176 views

Nagios erratic behavior when sending notification emails

I am having a really tough time setting up nagios3 to do what I want. Far too many config files and not sure where exactly the problem is as everything seems correct. First, notifications were sent ...
2
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1answer
3k views

How to log execution of a specific binary/script using auditd or other

I have the following situation in hand. I have one or more specific execuatble files in /usr/bin, I will call one /usr/bin/execute , and they may either be a compiled binary or a script file, such as ...
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0answers
960 views

SSMTP disable root mail sending

I installed SSMTP to easily send emails from cli with GMail. There is a problem that all system messages from root (xy@gmail.com) are sent with email to ubuntuuser@gmail.com. How I can disable this? ...
2
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1answer
749 views

Munin not creating html files in Ubuntu

I installed Munin in a Ubuntu Server 14.04 with Apache 2.4.7 But after all configuration, Munin isn't creating the html files in the html dir. This are my files: munin.conf dbdir /var/lib/munin ...