Ubuntu 12.04, named "Precise Pangolin" is the current Long Term Support (LTS) release of Ubuntu Linux. LTS releases receive updates for 5 years and have available paid support from Canonical. The version number comes from the year and month of release (April of 2012).

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opening port 80 on Ubuntu AWS

I'm running a tomcat server on an ubuntu machine hosted in an AWS instance. I can reach the server via public_ip:8080 but when i change the listening port on server.xml from 8080 to 80 connection is ...
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1answer
165 views

Tuning Postgresql on a 16GB Linode VPS

I'm running a dedicated PostgreSQL on a 16GB Linode (Ubuntu 12.04 32bit). I've tried using pgtune, but I'll run into shared memory errors. I.e. The PostgreSQL server failed to start. Please check the ...
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2answers
38 views

Ubuntu IPV6 /48 routed over link-local

I have a Ubuntu 12.04 set up with with a /48 IPv6 routed to it. According to the hosts documentation it's an expert only option, described like this: For those customers, we will route the ...
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3answers
124 views

Locking down my Ubuntu server with UFW [duplicate]

I'm using Ubuntu 12.04 on an Amazon EC2 instance and new to the sysadmin side of things. I'm working on a little project of my own and I'm already starting to get targeted by bots (at least I hope ...
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51 views

How to set up reverse DNS on Ubuntu 12.04 VPS

As far as I can remember when setting up my VPS and mail server on it, I had configured the mail server correctly. However, a few of my clients get SMTP errors, host mx1.zonnet.nl[62.58.50.9] ...
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1answer
56 views

Difference between AWS Software Subscription and Launching a Custom AMI?

Amazon AWS seems to provide two methods of launching an instance of Ubuntu 12.04 that confuse me, one of them is the Software Marketplace the other method is by launching an AMI on the Ubuntu ...
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34 views

OpenVPN service delaying startup

I'm developing an embedded system based on ubuntu 12.04 that runs an OpenVPN client to connect to a central server. However, the system may not always have internet access when it is booted. The ...
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101 views

Confluence Proxy Error Reason : Error reading from remote server

Since this morning I have trouble accessing my confluence. It's on an Ubuntu 12.04 server. The error itself is this Proxy Error The proxy server received an invalid response from an upstream ...
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93 views

Ubuntu 12.04 LTS ntp not working

I'm having major woes trying to get ntp working on several ubuntu 12.04 servers. Note this is NTP to keep the time set on those servers. Not to distribute the time! I've installed several of those ...
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2answers
56 views

OpenVPN clients traffic [duplicate]

How can I see or even control a client cert traffic in OpenVPN? Is it possible? I'm programming a Client Control Web App and I find nothing about it. Is there any script or commands for that? In ...
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0answers
91 views

How should I run HPC Challenge benchmark on Ubuntu?

I've found a package on Ubuntu, http://packages.ubuntu.com/precise/hpcc. An older version of it reads as description: "The High Performance Computing (HPC) Challenge benchmark runs a suite of 7 ...
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1answer
60 views

How to limit client connection in OpenVPN?

How can I limit a client maximum connection in OpenVPN? What I really want is to restrict more than one device using one client account? How can I do that? Is it even possible? I've seen in OpenVPN ...
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1answer
63 views

NGINX 301 Redirect a URL with parameters to new URL

I've deployed a site live and trying to redirect some of the original URLs to the new URLs. I'm fairly new with NGINX configuration on redirects like this. This one works: location /contactus.aspx { ...
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1answer
119 views

Apache 2.4.7 install issue

I've just compiled and installed Apache 2.4.7 => /usr/local/apache2/ The issue I'm having is that the default version is used apachectl -v Apache/2.2.22 (Ubuntu) /usr/local/apache2/bin/apachectl -v ...
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1answer
37 views

How to access domains via IP using nginx? [closed]

I'm currently working on switching my webserver from Cent OS running Apache2 and Cpanel to Ubuntu 12.04 LTS running nginx without a GUI (unless I can find a good one). One thing I haven't been able ...
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15 views

Ubuntu not refreshing LDAP group membership

I have an Ubuntu 12.04 client configured to authenticate users against an OpenLDAP server using libpam-ldapd. I've successfully configured group mapping, but the user's group membership does not ...
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1answer
90 views

Unable to automatically remove LVM data

I am trying to install ubuntu 12.04 via preceed config onto Dell PowerEdge R710. I had RedHat installed on the box then I tried installing ubuntu 12.04, then auto install popping with Unable to ...
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2answers
65 views

Tomcat logging and mod_proxy

I have Tomcat running on port 8080, and when I send a request directly to Tomcat it works fine: curl -IL http://localhost:8080/myapp HTTP/1.1 302 Moved Temporarily Server: Apache-Coyote/1.1 ...
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1answer
26 views

How to set up virtualhosts on Ubuntu dev machine in arbitrary directories, with write permissions for Apache and me?

I am on my XUbuntu 12.04 development machine, and I have installed the LAMP stack using tasksel install lamp-server. I've been trying to set up virtualhosts in my personal projects directories, ...
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1answer
82 views

Azure Linux VM Captured, Built from image. Different password or key for new VM: permission denied?

I followed How to Capture an Image of a Virtual Machine Running Linux to capture a VM image, after installing the packages I wanted on top of Ubuntu 12.04 LTS. I turned off the machine following a ...
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0answers
42 views

Bridging Adapter in Ubuntu 12.04 LTS for KVM

Fresh install of Ubuntu 12.04 LTS with libvert/KVM installed. I have 2 virtual machines that I need need to be on the same LAN as the host. The host has two physical interfaces eth0 and eth1. eth1 is ...
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1answer
58 views

Securing PHP on Ubuntu 12.04 LTS?

I recently set up an Ubuntu 12.04 server (with Apache 2.2 & PHP 5.3.10). While I was testing it, I noticed in the Apache access logs that an unknown IP address was trying to perform a PHP CGI ...
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1answer
72 views

Using GitLab, projects are missing from the API list

I use the GitLab API to fetch a list of the projects I have access to (URL /api/v3/projects/all?private_token=xxx), but there are 6-7 projects that are not included in the list for some reason. EDIT: ...
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51 views

Ubuntu 12.04 reply ARP request delay 10+ seconds

I'm running Ubuntu 12.04 in VirtualBox, my server program is running in it, its IP is 192.168.1.105. My client is running at 192.168.1.107. But the client alway took 10+ seconds to send a package to ...
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47 views

Trying to create an ElementaryOS PV guest on Xen

I am trying to install ElementaryOS as a pv guest on my server for testing purposes. Elementary OS is a fork of Ubuntu Precise. Elementary does not come with PV support, however, I can obtain the ...
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74 views

Apache 2.2 fails with “unable to write 'random state'” with 2048-bit RSA key (1024-bit works fine)

I'm usually pretty good with Apache and OpenSSL, but this one has me completely baffled. I'm running Apache 2.2.22 and OpenSSL 1.0.1 on a Ubuntu 12.04 LTS Server. I have an IP-based virtual host ...
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45 views

hald (HAL daemon) behavior analysis

We were looking at the behavior of HAL daemon on a Linux host (Ubuntu 12.04.2 LTS 64-bit). We looked at both its syslog and system calls (using strace). According to the documentation, HAL daemon ...
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0answers
43 views

EC2 - editing .bashrc causes terminal to hang and checks to fail

I've been testing this for the past few hours with no luck. When launching an Ubuntu 12.04 EC2 micro instance, I SSH to it, create a new user and continue with installing Ruby version manger under ...
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3answers
109 views

Virtualbox forward specific ip to guest

I have a dedicated server with Ubuntu 13.10 installed and a basic installation with Virtualbox and phpvirtualbox to manage the guest OSs on it. I have two IP addresses pointing to the server and I ...
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1answer
59 views

5.7.1 relay access denied when accessing from vb.net application

I am developing a program in vb.net which needs to connect directly with my mailserver (postfix) to send emails which will be directed towards email to sms transmissions. My mailserver is otherwise ...
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3answers
47 views

postfix, courier works locally not receiving external messages

I just did a fresh install of Postfix and courier on a ubuntu 12.04 machine the mail server appears to be working from the inside until you try to send an email from an external address (like gmail). ...
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34 views

How can I determine why I am getting error 500?

My setup is rails 3.2, with ruby 1.9.3 running on passenger and apache (production environment). I Recently used "mod_rewrite" to set up redirection for http -> https requests, and all went smoothly. ...
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2answers
95 views

How do I set nginx's cache files to file permissions 777?

I'm trying to write a process that invalidates the cache on nginx (and doesn't re-warm the cache). By default, nginx has 700 on its cache files. The closest setting that I could find was: ...
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1answer
70 views

When does Linux run out of memory? [duplicate]

I'm trying to establish why a process keeps unexpectedly stopping, and one possibility is that the server is running out of memory, but I'm not sure I understand memory and Linux properly. Take the ...
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2answers
89 views

Storing duplicate files efficiently on linux

I host a lot of websites and our system makes it easy to duplicate items in these sites which is handy, but leads to lots of duplicated (and potentially quite large) files. I was wondering if these is ...
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0answers
87 views

Icinga notification behaviour

The notifications I'm getting and not getting from Icinga don't seem to be making sense and I'm hoping someone here can help me out. It's Icinga 1.10.1 running on Ubuntu 12.04.3 LTS When the host ...
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0answers
128 views

Command-line CPU frequency scaling?

How to configure Ubuntu 12.04 Server to dynamically adjust CPU frequency during quiet times? I've found a set of instructions at http://ubuntuforums.org/showthread.php?t=944190, suggesting to add ...
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48 views

MYSQL became unresponsive after some time (In my case 30 mins) on high load (400 concurrent thread per hour)

I am doing load testing on my application using MySQL server for the same. Here I am putting load of 400 users per hour for doing something on application. I have done some MySQL tuning at my.conf ...
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0answers
48 views

Using Jekyll with Github webhooks for automated deployment

A little background first: I'm a designer and want to serve some static sites with Jekyll. So I grabbed a vps(ubuntu 12.04) and installed nginx, ruby and jekyll. I work from a few different ...
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1answer
41 views

What's the AB Command to Test 1000 Concurrent Visitors

How can I perform an AB test with 1,000 concurrent visitors in just a second? Say in 1 second, there are 1000 visitors on my site. And in another second there are 1800. In Another second again (3 ...
0
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1answer
51 views

Handling many outgoing TCP connections

I was testing a server on EC2 with "High" network performance to check the maximum outgoing connections I could use on it. Without changing any settings, by opening around ~1000 threads which each ...
2
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2answers
141 views

Something eats all memory on my server, but it is NOT fs cache

I had several times received notifications from my monitoring system about 98% memory. I ran top and counted only around 60% memory used if I sum memory column. After several hours memory usage was ...
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1answer
92 views

Is It Okay To Reload PHP-FPM Most Often?

Even how high I set the pm.start_servers, or pm.min/max_spare_servers, I always get this error when PHP-FPM reach the limit: WARNING: [pool web8] seems busy (you may need to increase ...
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1answer
42 views

ubuntu samba not connecting from mac

I have an ubuntu 12.10 VM with samba v 3.6.6 installed: Ubuntu 12.10 (GNU/Linux 3.5.0-44-generic x86_64) On my mac i can connect to the smb share no problems: smb://www.tests.net Finder then ...
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1answer
45 views

MySQLd all queries 'Lost Connection'

I am running mysql 5.5 on ubuntu 12.04 I have many databases : the main one has ~15k innodb tables with a ~2GB size and the other one is a db for simple machine forum ~50MB. 2 days ago, all my ...
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1answer
63 views

error when adding FTP port on iptables rule

I am trying to add FTP port on my iptable configuration which I suspect the reason I cannot access my FTP via FileZilla. /etc/iptables.firewall.rules *filter # Allow all loopback (lo0) traffic and ...
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1answer
111 views

How to configure SaltStack to work on other machines

I have installed SaltStack in my system (Ubuntu 12.04). for example If i want to run sudo apt-get update or wget to other machines like 4 to 5 machines using Salt. How should i want to configure my ...
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2answers
87 views

iptables and CONNMARK on ubuntu 12.04

I have Ubuntu 12.04 on a multi-homed host. I am trying to use iptables to reroute HTTP packets coming in to a certain IP address to another IP address. From Googling, I believe it is necessary on ...
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0answers
29 views

How do I get an Nginx non root ( “/” ) location to serve files?

I'm a Nginx beginner. I rented a little VPS with Ubuntu 12.04 to test. I rented no domain so I make requests directly using the ip. For this question let's assume the ip is 209.208.26.89. Installed ...
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1answer
199 views

* Starting NFS kernel daemon [fail]

Hi I follow the https://help.ubuntu.com/community/SettingUpNFSHowTo guid to install nfs server on ubuntu 12.04 64 bit server, but when I tried to start the server I get ubuntu# service ...