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.

learn more… | top users | synonyms (2)

2
votes
1answer
32 views

How to detect virtual machines freezes

On cloud platforms you often hear that because of high load on neighboring VMs, disks over oversubscribed ethernet, backups, or live migration to other hardware, the virtual machine can 'freeze' for a ...
0
votes
0answers
11 views

Can not view Ubuntu desktop on VNC viewer

I'm having problems on trying to connect to Ubuntu 14.04 via VNC from Windows. I'm able to stablish the connection but VNC isn't showing desktop icons. Futhermore, if i move the mouse on the VNC ...
0
votes
0answers
5 views

apache mod_rewrite scenario subdomain capturing from the http_host and passing it as subdomain to other url while rewriting it

i am trying to write two rewrite rules which are PASS THROUGH or PROXY so that i can hide the underlying url. Case1: When a request comes to app.domain.com/folder1/folder2/ it should go through ...
-1
votes
0answers
14 views

How to remove Mirror HDD RAID1 [on hold]

Sorry for asking such stupid kind of question but i am not expert but really i want to solve it I am not expert on linux system and server's configuration I purchase OVH Dedicated server that have ...
-1
votes
0answers
33 views

One PHP script that brings whole server down

We have a WordPress site hosted on Amazon, running Ubuntu and Apache. Occasionally the site becomes very slow and unresponsive. According to newrelic, the server is busy with this PHP script: ...
0
votes
0answers
3 views

Switching a VirtualBox Ubuntu Server VM from UEFI to BIOS [migrated]

I have a virtual machine running in VirtualBox of Ubuntu Server 14.04.1 LTS x64. When I initially set it up, I configured the VM to use EFI instead of BIOS. But, it turns out VirtualBox's ...
3
votes
2answers
63 views

Software RAID 10 not any faster than s/w RAID 5 on Ubuntu 14.04 box, why?

We are doing some tests on a new database server with 4 x 240 GB SSD disks. From what I have read RAID 10 should be faster than RAID 5 with the same "one-disk loss ok" redundancy. However when ...
0
votes
1answer
7 views

Ubuntu OpenVPN GUI setting incorrect default routing gateway

I'm currently playing with setting up an OpenVPN Access Server in AWS. For the most part I've got everything working, except when I try to add the VPN connection to Ubuntu using the networks GUI. ...
0
votes
1answer
17 views

ASSP performs SPF check on mail it forwarded itself

So I set up ASSP and it seems to work because I'm getting mail. Yay. But it's performing some strange SPF checks. Some domains can't send me mail, and receive an error message back. In it is a link ...
0
votes
0answers
14 views

Docker debian slow dns resolve

I got terribly slow dns resolve inside my ubuntu when using wget or curl, apt-get,... root@815340a37f0e:/# time curl www.google.com ... real 0m5.132s user 0m0.006s sys 0m0.003s When I do ...
0
votes
0answers
10 views

`hosts-restricted` without `restricted-usernames`

I have a user that is getting blocked by denyhosts on a daily basis after some initial problems and confusion with keys, passwords, account names and such, even though I keep unblocking him. When I ...
0
votes
0answers
21 views

Difficulty sharing physical ethernet device with Xen 4.4

I have a virtualized PowerEdge T320, with a Ubuntu Server 14.04 running Xen 4.4 as host, that I use at my lab to do scientific computations (I'm the admin of the machine). This server has two physical ...
-1
votes
0answers
4 views

Zend optimizier doesnt work after installing it [duplicate]

I install it following this tutorial on a VestaCP based host http://www.debiantutorials.com/installing-zend-guard-loader-zend-optimizer-on-wheezy/ I enable it adding the lines to ...
1
vote
0answers
48 views

NGINX using 100% of the server CPU when testing with Blitz.io

I'm facing an issue here and after four days of looking around I decided to ask for some help here, after all a million heads can think a lot better than one. I have a Ubuntu 14.04 server setup with ...
-1
votes
1answer
27 views

Ubuntu server suddenly freeze 12.04LTS

I am using Ubuntu to host a Java server application and apache2 for website. The server is running well for a month and it suddenly get frozen. The java server application has no response. Apache ...
-1
votes
0answers
11 views

Installed Zend Guard Loader, sites don't work anymore [on hold]

Well I was getting "Zend Optimizer not installed" page for a wordpress site that I just transfered to a new server (is it possible the theme needs it?) installed it using this tutorial: ...
0
votes
1answer
41 views

very long “connecting” in chrome using ipv6

A connection to an ipv6 subdobain www6.example.com takes very long. In chrome the net tab shows 20s spend in "connecting". All other times are much faster. However only the first two connections are ...
1
vote
0answers
25 views

Domain user can't login after power failure

I've got a Ubuntu 14.04 server running Samba 4.1.6 functioning as a domain controller. Last Saturday I had a brown out, and after the server came back up my network shares were no longer automatically ...
0
votes
1answer
24 views

What causes “SYN to LISTEN sockets dropped”?

A quite busy proxy server has lots of "SYNs to LISTEN sockets dropped". I learned one cause could be a too small backlog size. But in that case the "times the listen queue of a socket overflowed" ...
0
votes
1answer
27 views

Ubuntu / node.js dropping incoming requests [on hold]

I am getting dropped requests on a node.js server. I have simplified the test case to the point that it must be a problem with system setup. I am a developer and have very little experience with ...
-1
votes
1answer
25 views

Ubuntu 14.04 Server: Use STATIC DNS servers [on hold]

How can I disable DHCP nameservers in Ubuntu 14.04? I have 2 Ipv4 and 2 Ipv6 nameservers which I want to use, but resolvconf only generates a file with nameservers from my hoster because the server ...
0
votes
2answers
23 views

Running startup shell script for ruby application as other user (not root)

I have installed RVM using 'user01' on Ubuntu 14.04 and user01 can start my rails application as expected. I, however, want to start this application following system start-up. I am trying to use the ...
0
votes
1answer
11 views

404 error for WebResource.axd with fastcgi-mono-server4

I have a simple ASP.NET WebForms app that I created in Windows and copied over to a Linux server (Ubuntu 14.04) that is running fastcgi-mono-server4 and nginx. The app runs fine on windows, but when ...
-4
votes
0answers
29 views

tunnel 6to4 via ssh [on hold]

Before starting let me give you short idea about infrastructure and topology and the problem which we are trying to resolve We have 4 Machine i.e. A, B, C and D with Ubuntu OS We are trying to ...
-1
votes
1answer
11 views

Mongod not working but data exists

I am running a Homestead virtual box. I installed mongodb recently and was able to type mongod and it would load as it should. Now though I get an error saying dbpath /data/db does not exist. The ...
-5
votes
0answers
49 views

Slow site, most time spent Blocking/Connecting [closed]

My site is based on user-submitted content, meaning that users can upload images, etc. The problem is, my website loads extremely slowly on first load (before it caches). For example, here is the ...
0
votes
0answers
20 views

“More than one MPM loaded” when trying to start apache on Vagrant Ubuntu box

Whenever I try sudo apache2ctl start I receive the following message: AH00534: apache2: Configuration error: More than one MPM loaded. Action '-k restart' failed. The Apache error log may have more ...
0
votes
0answers
30 views

How to connect ubuntu to external smtp on port 587?

I have a fresh ubuntu server installation with no firewall and want to setup ssmtp to an external smtp server (e.g. smtp.mandrillapp.com:587), however, I couldn't get my server to connect to any ...
1
vote
0answers
27 views

Build a repository with apt-mirror for ubuntu with changelogs

is it possible to create an internal mirror of the ubuntu update repository with apt-mirror including all the changelogs. I have the following output when i ask for the changelog of a package: ...
0
votes
1answer
19 views

Allow dev user to edit files that sometimes belong to www-data

This question has been asked time and time again but none of the answers seem to answer my specific question - either that or I'm not getting it. Anyway, as per the title, I'm trying to limit our web ...
-1
votes
1answer
16 views

Correct packages to install LAMP on ubuntu

I have read some tutorials about install LAMP and I have seen that they install differents packages for MySQL and PHP. For example to install MySQL: 1. mysql-server 2. mysql-server ...
-1
votes
0answers
22 views

Ubuntu SQUID 3.3.2 + MIKROTIK cAP 2port [on hold]

have an issue: I have Mikrotik(2 port), 1 SQUID UBUNTU(configured by external dude) and client pool. The scheme looks like : |User Pool| - >| Mikrotik | -> ether1-gateway subnet -> | SQUID | So ...
0
votes
1answer
33 views

mySQL issue at installation

I have great trouble with mySQL installation. The error message in log (/var/log/debug) is: Nov 20 11:17:41 gotfarm1 /etc/init.d/mysql[11880]: 0 processes alive and '/usr/bin/mysqladmin ...
1
vote
1answer
29 views

Ubuntu Server 14.04LTS Swappiness for server with 16GB memory

(don't worry I'm not asking what my setting should be, asking for the theory behind some conflicting advice I've read) My application is one that is lightweight and not under much load, but needs to ...
1
vote
2answers
24 views

“No input file specified” when running php under fastcgi inside chroot under nginx outside of chroot

I have a scenario with nginx/1.4.6 running on Ubuntu 14.04 but with php/5.2.10 inside a chroot Ubuntu 9.10 (Karmic Koala). My issue is that all requests to php files result in the dreaded "No input ...
-1
votes
0answers
14 views

Login kickout every time in Ubuntu Server 14.04 LTS

We have installed Ubuntu 14.04 LTS in our production servers. Our Dedicated server disk was filled, due to that issue one of the production server stopped. While troubleshooting i found that disk was ...
0
votes
0answers
3 views

Execute script on ipv6 prefix change [migrated]

How can I execute a script or program whenever my (world-routeable) IPv6 prefix changes? If there is (currently) no easy way to do this, a pointer to the corresponding Posix system calls would be ...
-3
votes
0answers
19 views

attack to vps trought requests from localhost [closed]

I'm having a problem with a vps running ubuntu 12that i own. Last days, the cpu of the vps was at 100% all the time. Running htop, i was able to see that i have a process named "host", created by ...
0
votes
1answer
37 views

PHP file downloaded instead of executed with nginx try_files

I'm using Ubuntu 14.10, nginx 1.6.2, php 5.5.12. I have a site set up like this: server { root /usr/share/nginx/www/oliviataussig; index index.php; server_name oliviataussig.com ...
0
votes
0answers
12 views

Fail2Ban Correctly Attempts to Ban IP but IP does not get banned - iptables chain exists but not working

Running on Ubuntu 14.04 Server. So I have fail2ban correctly configured to process /var/log/auth.log for SSH login attempts. Upon 3 failed attempts I see this in the fail2ban log: 2014-11-19 ...
1
vote
0answers
23 views

“Open files” ulimit applied only when using 'su - userX' but not when I SSH into server

I'm running Ubuntu 12.04. My problem is that the ulimit values described in limits.conf are not being applied when I SSH into my server using a non root account. Either that or they are being applied ...
0
votes
0answers
24 views

“A new version of /boot/grub/menu.lst is available” when upgrading Ubuntu on an AWS server

I just tried to do a sudo do_release_upgrade on an AWS EC2 Ubuntu 13.10 server to upgrade to 14.04. All was going well until I got the following message: A new version of /boot/grub/menu.lst is ...
1
vote
0answers
32 views

Server being hacked with lots of weird process [duplicate]

(I have asked same question at http://superuser.com/questions/841908/server-being-hacked-with-lots-of-weird-process and was told better to ask here, could some admin help delete the post at ...
0
votes
2answers
62 views

Issue with multiple virtual hosts on dedicated server. 2nd VH won't respond, 1st one does

I've got two virtual hosts setup and enabled using a2ensite. It's Ubuntu Server 14.04.1 LTS, Apache2, etc. So there's two config files in /etc/apache2/sites-available and their respective symlinks ...
-2
votes
0answers
17 views

Dkim and domainkeys always come as neutral [on hold]

Well i tried this tool isnotspam.com and it say: DomainKeys Check : neutral DKIM Check : neutral and in mail log has: postfix/smtpd[5236]: warning: connect to Milter service inet:localhost:10027: ...
0
votes
1answer
17 views

Amazon EC2 server cannot connect and access via putty out of sudden

I have a ubuntu server setup in amazon ec2 for few months. Today, out of sudden, the server status is not reacheable and putty is not accessible too. I've also rebooted the system, it seems to be ...
0
votes
2answers
438 views

How do I set permissions for uploading media in WordPress? (Ubuntu 14.04.1, nginx 1.4.6)

I'm having trouble finding the correct permissions for running a WordPress site on my droplet. I followed this guide to configure the site: How To Configure Secure Updates and Installations in ...
1
vote
1answer
34 views

dspam crashes with “general protection” kernel error [closed]

I use DSpam with Postfix. Recently DSpam started to crash with the following error in syslog: Nov 16 14:10:55 home kernel: [ 133.042190] traps: dspam[1692] general protection ip:7f63a493f3b0 ...
0
votes
0answers
14 views

Lost ssh-control on aws ec2 instance after Ubuntu update

During major update of Ubintu on my aws ec2 instance, system asked me if I want to disable ability to ssh under root user, as for most systems it's not used, but simplifies attacks. As by default I ...
0
votes
2answers
65 views

How does Linux pick which network interface to use?

Let's say I have a machine with two network adapters on different subnets, eth0 (10.0.100.5) and eth1 (10.0.200.5). Assuming both subnets have routes to the internet (though their own NATs) and to the ...