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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How to set up unique X-server for each active VNC user

I'm trying to set up a server for analysing MEG data where it's possible for multiple users to simultaneously run unique instances of Matlab on unique X instances. We have 32 gb ram and an SSD, so I'm ...
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40 views

nginx-extras ok for production server?

I need the upload progress extension on my production server running Nginx, the only problem is that to do that I must actually recompile the whole of Nginx. This means uninstalling the repo Nginx, ...
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150 views

Ports blocked on ubuntu 13.10 vps

I have been searching all over for an answer, i got a cheap vps server running ubuntu 13.10 and installed webmin which should allow me to go to serverip:10000 But i can't connect to it and ...
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26 views

alternative to smb.conf / normal samba configuration

I have a Ubuntu-based server that provides SMB access for many users. Is there any way I could manage the shares and user permissions WITHOUT having to update smb.conf everytime? I'm not using LDAP in ...
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78 views

Using ufw on OpenVZ-based VPSes

I'm facing with a problem to set up ufw on Ubuntu 12.04 running on an OpenVZ-based VPS. I know there is limitations for ufw. I googled a bunch of articles how to resolve the issue (like: ...
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65 views

(111 connection refused) while connecting to upstream

I have a ubuntu 13.10 server with nginx and php5-fpm installed, the server has just been started and as such i am sure it is not a buffer or connection overload issue. I have set the site config in ...
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26 views

prefork doesn't appear to be listening to MaxClients in config file

Apologies in advance if this is a stupid question, I'm new to all of this! I have prefork installed on a ubuntu server which I confirmed by running aptitude search apache2-mpm- Which gave me p ...
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89 views

ubuntu upstart - how to set global nofile limit?

ubuntu 12.04 I have change the setting: /etc/security/limits.conf * soft nofile 65000 * hard nofile 65000 but cat /proc/{PID}/limits: Limit ...
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67 views

Failed To Install syslinux on USBDRIVE with Mac OS X

I am creating Ubuntu Server 13.10 Bootable USBDRIVE with command line using Mac OS X, In this i tried to install Syslinux on USBDRIVE by using syslinux command by following: xxx-Mac:~xxx$ sudo ...
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51 views

Unable to generate a Bundle of CA Root Certificates (failed to create symbolic link)

I am trying to generate a Bundle of CA Root Certificates. Similar to what Facebook has done for its PHP SDK (https://github.com/facebook/facebook-php-sdk/blob/master/src/fb_ca_chain_bundle.crt). I ...
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46 views

AWS: how should I configure my vhosts to access different directories depending on the address I'm coming from?

I've just set up route 53 on AWS to link my server (ubuntu) to a godaddy domain name. I used to be able to access my /var/www/mmf folder from the elastic IP address given by aws (54.214.246.243/mmf) ...
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57 views

sshd running at 100%

I'm running an Ubuntu/WordPress server on Amazon EC2 which is experiencing problems every 24-48 hours: I get a CPU alarm from EC2, log into the server, and discover sshd is running at 99.9% CPU. This ...
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57 views

Reason for high CPU time when executing fio

After weeks of troubleshooting some performance issues I have on my VPS running Ubuntu 12.04 LTS, I am getting closer to the conclusion that the problem is related to IO. When I have a considerable ...
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202 views

Apache bloodhound installation, AWS host not serving site

Following the installation instructions here I went through the entire process on an AWS instance. Everything seems to be setup correctly, I can even run BH off the development server using: tracd ...
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15 views

install xdebug on ubuntu to one directory

How do I install xdebug on ubuntu to one directory? I've tried adding the confing for xdebug in a php.ini file in the root of the site but this did nothing to override the defaults which are set when ...
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233 views

Ubuntu server 13.10: Installing and running Archipel from deb packages

I am setting up a server to host virtual machines based on Ubuntu Saucy. The decision was to use Archipel for remote administration. Installation of ejabber and Web Client UI went smoothly. For the ...
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67 views

NFSv3 Asynchronous Write Depends on Block Size?

I am trying to figure out if my NFSv3 deployment is performing SAFE asynchronous writes. I suspect that it is doing strictly synchronous writes, as I am getting poor performance in general. I used ...
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82 views

ssh hangs in Ubuntu MaaS heterogeneous cluster

I have the following issue when using ssh on my local network. I have setup a small cluster of Xeon machines using MAAS. I have installed Ubuntu Server 12.04 on all machines and configured local ...
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33 views

Stack , data and address space limits on an Ubuntu server

I am running an Ubuntu server which has around 5000 users. The users are allowed to SSH in to the system. So in order to cap the memory used up by a process I have capped the address space limits ...
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157 views

how to enable remote access to a MySQL server on an AZURE virtual machine

I have an AZURE virtual machine with a MySQL server installed on it running ubuntu 13.04. I am trying to remote connect to the MySQL server however get the simple error "Can't connect to MySQL server ...
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75 views

How Do I Stop NFS Clients from Using All of the NFS Server's Resources?

I have a v4 NFS server running on Ubuntu 12.04LTS. It is the main repository for the web assets that four external nginx webservers mount to serve up to site visitors. These client servers connect ...
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171 views

How to connect Java Flight Recorder (from JDK 7 U 40) to a remote JBoss 7

I have a remote Ubuntu server with Jboss 7 and a local Ubuntu desktop machine and I can already monitor JBoss using jconsole and visualvm scripts that come with it. After the release of Java 7 Update ...
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60 views

Setting up email on a Ubuntu VPS

I am using a 123-reg VPS with Ubuntu. The web sites are working fine as is mySql Database, mail is another issue. I get the following error when sending a email to the new server via outlook: retry ...
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35 views

Deleting a file over SAMBA, server is seeing 1MB/s upload

Server: Ubuntu 12.04 LTS 64 bit. Client: Win7 professional 64 bit. Creds: account on server. no domain, no kerberos. Samba config: stock. shares have very simple access retrictions like writeable on, ...
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135 views

Unable to install Alpha SSL certificate for Openfire

I have been issued an SSL certificate for www.mydomain.com, I have been able to successfully implement the certificate for the site and the site is working is https. However, I have not been able to ...
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58 views

openvpn setup ping/routing fail

My problem is that after setting up VPN on a virtual machine (Ubuntu Linux) with that has an IP I cant ping anyone at all over the tun interface from the client. VPN Connection is however successful. ...
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137 views

Why won't my Ubuntu 12.04 Preseed file work with LVM

Here is my preseed file: d-i partman-auto/disk string /dev/sda d-i partman-auto/method string lvm d-i partman-lvm/device_remove_lvm boolean true d-i partman-lvm/device_remove_lvm_span boolean true ...
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41 views

maintaining session in elastic Bean

As the number of instances changes from time to time in EBS amazon. If an application is built in PHP how the session will be mantained among several instances? How can we make sure not to delete the ...
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78 views

Amazon S3 sync theory

I'm setting up a backup of my vital data (database and images, mainly) to S3 from my Ubuntu box. I've set up Amazon S3, and installed S3FS to mount the bucket on my machine. This is working well, but ...
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57 views

Upstart task to wait for iscsi target to become available?

I've got a couple of virtualization servers running Ubuntu 12.04 and Virtualbox and just bought a Synology NAS which I plan to use as an iSCSI target to serve storage for the VMs. I realize that ...
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211 views

Synology cifs mount wont allow execution

I have a synology NAS. I am able to mount a cifs directory fine on linux (tried both centos 6 and Ubuntu 12). I can do everything fine except I can't execute anything on it. If I try tab to complete, ...
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158 views

postgres not starting after reboot on ubuntu

I'm not familiar with ubuntu (raring), so could someone help me please: I'm using postgresql 9.1 from apt. It installed the appropriate init script in /etc/init.d/postgresql. I can start the server ...
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27 views

htaccess is not redirecting in server

I'm having problem with a .htaccess file removing request.php from URL. My htaccess file is <IfModule mod_rewrite.c> RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f RewriteCond ...
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123 views

python ubuntu and ImportError: libblpapi3_64.so: cannot open shared object file: No such file or directory

How do I set a LD_LIBRARY_PATH in ubuntu 12.04? in .bashrc LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/ubuntu/blpapi_cpp/Linux in /etc/environment ...
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76 views

File I/O Throughput

I have an IBM x3650 M4 server (64-bit) running Ubuntu 13.04 Desktop (32-bit). I realize that this is a non-standard setup by it's being driven by other requirements. I am seeing slow file writes ...
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48 views

Best effort (failover) HTTP proxy use in aptitude?

I was installing a new Ubuntu 13.10 (daily build) for testing, and came to the option of being able to configure an HTTP proxy server for aptitude. It's been a while since I've sat through an ...
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215 views

Ubuntu 13.04: apt-get and check-new-release CPU bound

I own a virtual server hosted by a provider. A few hours ago I was notified about the VM being CPU-bound. I couldn't log in and rebooted the server. After the boot, apt-get and check-new-release were ...
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136 views

Why can't I get logwatch to output anything in Ubuntu?

So I installed logwatch using this guide on a Ubuntu 12.04 box. I also setup postfix and my initial intention was to add a daily cronjob to email me these reports (I have the same setup on a Debian ...
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43 views

How can I optimize this nginx proxy cache configuration?

I want to cache all *.html files in a Nginx reverse proxy, So I added the config: # Original configuration location = / { proxy_pass http://192.168.12.12:91; proxy_set_header Host ...
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182 views

Bash Script that connects to VPN server via openvpn, runs a program, and then disconnects from openvpn server

The operating system I am using is Ubuntu Server 10. I've been trying to cobble together a way to connect to a vpn server via openvpn using command line, run a unison profile, and then disconnect from ...
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300 views

In Amazon EC2, what's the best way to clone a private github repository on boot?

I need to configure an autoscale group of EC2 instances that on boot will clone a particular branch and commit from a private github repository, then execute code from inside that repository. I'm ...
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30 views

Mod rewrite to remove a directory

I'm running a PHP web app that has a .htaccess file as below. DirectoryIndex index.php <IfModule mod_rewrite.c> RewriteEngine On #RewriteBase / RewriteCond %{REQUEST_URI} ^(.*)//(.*)$ ...
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145 views

Nagios 3.5 doesn't send notifications

The automated notifications from Nagios 3.5.0 (on Ubuntu) don't seem to work and the error given is "No contacts were found for notification purposes. No notification was sent out". The below can be ...
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44 views

Ubuntu: An init script that requires mysql

We have built some software that connects to MySQL and should be started on an Ubuntu server at boot. What we're missing is how to ensure it starts at boot after MySQL. Our init script includes the ...
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460 views

Installation of 64-bit Ubuntu 13.04 server fails with “Unable to install busybox-initramfs”

I tried installing the 64-bit 13.04 Ubuntu server on a fairly generic superMicro box with dual OCZ SSD's I plan to software RAID. The install failed with a "Unable to install busybox-initramfs" ...
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112 views

Resize a RAID 5 Partition

I'm moving my VG to a RAID, i have 3 disk 600GB, the VG is in the partition /dev/sdc2 /dev/sdc1 1G type linux <-- Boot partition /dev/sdc2 599G type Linux LVM One disk have the VG and with the ...
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72 views

Kerberos Single Sign On

I am trying to implement Single Sign On using kerberos with ssh. I changed the below files and restarted the ssh daemon. /etc/ssh_config GSSAPIAuthentication yes GSSAPIDelegateCredentials yes ...
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244 views

Using ebtables to drop packets out of bridge and route via Tinc VPN

We have a bridge set up on Ubuntu to link our LAN to our gateway which is on the same subnet. We need this to be able to control the traffic and are not currently in a position to change subnets so we ...
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96 views

Fail with ab test with nginx, two workers and 1024 connections?

I'm doing some tests with nginx 1.4.1 and Node.js 0.10.5 on my development machine (P8700 Dual Core 2.53Ghz, 4Gb RAM running Xubuntu x64). Unfortunately I can't do ab with 100000 requests with a ...
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46 views

Time-based quota for serving files via Nginx

Is there a way to make nginx stop serving files after some amount of traffic has happened in a given period of time? Something like - if the server served more than 1G in the last day, stop serving. ...