Questions related to Ubuntu Server, and server-related packages.

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Dovecot user login failed

I have a problem with my dovecot. I want to make a mail server using postfix, dovecot, thunderbrid and outlook for windows users. But when I install and configure dovecot, I can't login with my mail ...
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12 views

WAN over wifi and eth to LAN

I have a USB Network card (TP link 722n) in my system. It has been recognised by the system. I do need to connect to a remote network over wifi and access internet. SSID:WHATEVER WPA2 ...
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6 views

running redmine on a browser via webrick

Query run: ruby usr/share/redmine/script/server webrick -e prodiction got the following result: ruby: no such file or directory -- usr/share/redmine/script/server (LoadError)
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Adding Repository using Phusion passenger for redmine

Add repository source deb https://oss-binaries.phusionpassenger.com/apt/passenger trusty main Result : https://oss-binaries.phusionpassenger.com/apt/passenger trusty main is not known
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1answer
62 views

Upgrading server from 13.04 to 13.10 (eventually 14.04)

I'm trying to upgrade a production server from 13.04 to 13.10. I've run 'sudo do-release-upgrade' but I'm getting 404 errors and I don't know how to quickly fix this. Anyone have any ideas or should ...
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Phusion passenger installation on ubuntu

To Add repository for Phusion Passenger I ran : sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 561F9B9CAC40B2F7 Result: key 561F9B9CAC40B2F7 can't be retrieved gpg: no valid OpenPGP ...
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0answers
13 views

Experience about Linux Foundation Certification Sysadmin [on hold]

I want to certificate me to a linux sysadmin with the Linux Foundation Certification. Did anybody have experience about this certifiaction? Did anybody own this cert? Thanks
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1answer
17 views

I did “sudo reboot” on my server and its going web page not found [on hold]

i did above command my ftp works fine but website give me error like This webpage is not available
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1answer
9 views

Setting up Minecraft server to start and stop automatically

I followed this tutorial: http://minecraft.gamepedia.com/Tutorials/Ubuntu_startup_script ...and I am getting an error that says: start: Unknown job: minecraft-server ...when I run the start or ...
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8 views

What does (mysql-workbench-bin:4022): Gtk-CRITICAL **: gtk_tree_view_unref_tree_helper: assertion 'node != NULL' failed means?

I'am running a Mysql server at my Linux system locally running the Debian version, and I start the server and that's okay. Then I start Mysql Workbench and when I execute the Mysql script, I can see ...
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11 views

Redirect all traffic except DNS

I successfully setup Ubuntu server up & running. Server configuration: tun0 192.168.99.1/24 NAT Enabled Note that client able to communicate with server. ping 192.168.99.1 Now I stuck at ...
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Adding my domain's email in gmail for “Send mail as” gmail feature

I have email set up on my Ubuntu server and when I do dig mydomain.com mx the output is: ;; ANSWER SECTION: mydomain.com. 86400 IN MX 10 mail.mydomain.com. Now when I'm using gmail, I ...
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0answers
6 views

VM ware player Ubuntu post Installation problem- VT-x not in BIOS on lenovo T430

I am getting the following error: "This host supports Intel VT-x, but Intel VT-x is disabled" When I went into BIOS to change these, I did not find any option like "VT-x" Ubuntu version-14.04.01 VM- ...
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1answer
42 views

Why choose ubuntu 12.04 or 14.04 over other linux distros?

Trying to white up some notes on why we choose ubuntu over all the other distros out there but it would be good to know what the you guys think is the reason Does ubuntu 12.04/14.04 LTS have a longer ...
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11 views

Manage Client and Server in Ubuntu

I just stuck with the problem of Client Server Management with Ubuntu 12.4. Recently I have installed Ubuntu in couple of PC. Now i want to access one PC as Server and remaining PC's as Client. I ...
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14 views

connecting ubuntu via ssh in azure cloud :bad file number port 22

I have successfully created virtual machine(ubuntu) in azure cloud,after that i am connecting it through ssh.For the first time its worked and i installed lampp stack an vsftpd on it.But now i will ...
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13 views

Could not load host key: /etc/ssh/ssh_host_ed25519_key in /var/log/auth.log

I have an Ubuntu 14.04 instance running on AWS. I was browsing the auth logs (/var/log/auth.log*), and noticed the following line appearing: Could not load host key: /etc/ssh/ssh_host_ed25519_key ...
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1answer
16 views

Ubuntu 15.04 desktop - How can I make Ubuntu boot to the command line?

I am running Ubuntu 15.04 in Virtual Box with the standard GUI. However, I want to be able to have the option to boot it to the command line and run it without the GUI. How do I do this? Have ...
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8 views

CIFS client behaving as root on server

I have a CIFS client w/a regular user. I have a SAMBA server where the only user is root. I want the user on the client system to be able to access the files on the remote server as root. So far I ...
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22 views

Windows domain users cannot login Ubuntu 14.04

I have an assignment that requires windows domain users to be able log in with their designated username and password, but it's not working for me. And Yes, I have enabled and configured that file to ...
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0answers
8 views

14.04 Channel 'DAHDI/1-1' sent into invalid extension

Hi I am setting up a very simple asterisk system with 1 analog card TDM410P and a few SIP account extensions in my home. I use a Ubuntu Server. When calls are incoming on the TDM410P, they should be ...
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7 views

Error while updating with drush

I have an ubuntu server with apache that is going to be the host of our public web site (the site is using Drupal). We currently have a public web site and are moving that site to a new server. I ...
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0answers
13 views

EMAIL SERVER SET-UP IN UBUNTU 14.04: how to create a shell or python script to automate email user or account creation

i have set-up an email server in ubuntu 14.04 desktop for use within my local network 192.168.0.0/24. i have build a programme that i want to connect to my email server. i have incorporated an ...
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13 views

IPv6 Tunnel behind NAT

I have a Ubuntu VPS with several IPv6 addresses as well as a IPv4 address. I am travelling often, so I want to set up a tunnel to my VPS which can be initiated from a laptop behind a NAT, which will ...
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1answer
34 views

Accidentally run command rm -R in Amazon EC2. Unable to login

I'm using Amazon EC2 for Magento website and WinScp to access SFTP. Sometimes I'm using terminal in WinScp to execute command. Today I need to delete some files so I used rm -R /* and forget to ...
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1answer
19 views

Installing ubuntu-desktop on ubuntu server doesn't work?

I installed ubuntu server 14.04 perfectly well. I made an sudo apt-get update and after sudo apt-get install --no-install-recommends ubuntu-desktop I reboot my machine I can access to the ...
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9 views

How can I create a squid3 rule (deny)?

I want, that the clients can't work on a SSH-server. The proxy squid3 should deny it. But I don't get the right configiration. Can anybody show me the correct config? Thanks
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43 views

Ubuntu 15.04 no longer mounts samba share on boot

I recently upgraded to ubuntu server 15.04 from 14.04. I have this line in my fstab: Samba //192.168.1.101/mediaserver2/ /mnt/mediaserver/ cifs ...
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2answers
33 views

How to allow this connection on the Firewall?

I am trying to connect my Ubuntu Web Server to my Ubuntu Storage Server using NFS (Network File System). But when I try to mount a Storage Server to the Web Server, I get a "Connection Timeout" ...
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33 views

Low priority process (nice 19) getting more CPU time than regular process (nice 0)

I have a server running Ubuntu server 14.04 64bit and I am having an "interesting" problem with it. I have 2 users running some programs concurrentlly - d and m. The processes of user "m" are not time ...
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How to add “roles” to server after initial installation

During Ubuntu Server 14.04 installation, I'm prompted to select a number of metapackages to install (which seems similar to the Windows Server notion of roles). Is there an easy way to install one of ...
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1answer
24 views

DHCP for multi netwok

I hope I well get help as I got always in this excellent forum. We have over 120 networks (192, 172 and 10 ranges)and at the moment our DHCP server is windows server 2008, which I would like to ...
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8 views

Help Needed With After-Que Content Filter Reading Incoming Message, Content Filter Made With Java Program

I am trying to make a postfix after-que content filter with a java program. I am having trouble reading the message as it comes into postfix with the java program I wrote. My java program listens on ...
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4 views

Debian change runlevel during boot [migrated]

I've read lots and understand changing runlevel defaults and during runtime, but how can I change runlevel during the boot up of a Debian server? Background: XenServer virtual machine Debian Server. ...
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1answer
33 views

How to create a SFTP (SSH) User with extremely limited permissions

i run a server on Ubuntu Server 14.04. I want to create a user that is able to connect via sftp, download 1 file and terminate the connection. The user should not be able to do ANYTHING else. Browsing ...
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How can i build a two-node cluster with Ubuntu-Server 15.04, is there any doc?

i search everywhere for official documentation on how to build a cluster, but i couldn't find anything. Does anyone know if there's official documentation for this ? Thanks a lot.
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cannot set header('Content-Length') greater than 2GB

i am using the following code to download files from the server: <?php ignore_user_abort(true); set_time_limit(0); function my_filesize($fp) { $return = false; ...
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3answers
206 views

What does `pbrun -u [username] dap' do?

What does pbrun -u [username] dap do? I tried to search for the dap option, but not sure exactly what this dap stand for and its functionality.
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14 views

swap option missing while installing in ubuntu server 14.04 lts

There is no option to select swap partition while installing the server version....I have tried all the possible ways to check the option and not found anything. Is their anyway to enter manually
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0answers
16 views

Route 53 Amazon dns server not found

I just configured my domain on Route53, for ubtuntu server i have with public ip, as following: but when i try to go to my site, i found "server not found" error or "page is not available" on ...
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0answers
12 views

MAAS Power-on problem IDRAC IPMI 2.0

I'm currently having a problem in getting MaaS (v1.7) to properly provision a Dell PowerEdge R630 server. The MaaS vm itself is able to detect the server automatically, and once the dell server boots ...
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1answer
25 views

How to make TightVNC, TigerVNC, TurboVNC and other VNC servers run on a non-standard port

I used to run the default VNC server (/usr/lib/vino/vino-server) but it is unable show VirtualBox VMs. So, I have installed TurboVNC, which is designed to support 3D and shows my VirtualBox VMs all ...
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1answer
29 views

setting up a SSHserver [on hold]

Could anyone explain me the configuration for a SSH server. I am new to administration so not fully aware of the options available at the config. My purpose here is to create a SSH server. And what I ...
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1answer
25 views
+50

What can a Beowulf cluster help process?

So, my school has hundreds of old computers and a few gigabit switches. Coordinating with the head of district for my school, I've been granted permission to make a Beowulf cluster, using one, two or ...
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“catch all” Rule in Squid3

I installed squid3 on my Ubuntu Server. I read, that the last rule in the squid.conf should be a "catch all"-rule. Also I read, that squid do the opposit of the this last rule. If I will write this ...
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2answers
21 views

Is it possible to sign in to server via SSH without SSH key?

So what has happenend, is that I have a Ubuntu 14 server. I have my SSH key uploaded to the server, and a password. I only have one user; root. The problem is now, I formatted the computer on which I ...
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1answer
17 views

How do I setup a server side JavaScript

I keep hearing about how fast server side JavaScript is. I also have a project in which I want to use that tool. I tried Googling it, but could not find a simple and detailed tutorial on how to get ...
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2answers
39 views

WiFi Won't Reliably Connect On Ubuntu Server Bootup/Reboot

I am using Ubuntu Server 14.04.2 LTS and the micro wireless adapter TP-LINK TL-WN725N. I am having trouble with automatic connection when booting up. If I reboot 10 times, it may only connect 4-6 ...
2
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1answer
20 views

Make htaccess file impossible to be modified

I am running my wordpress website under Ubuntu server and the .htaccess file keeps changing every week. Now I would like to make .htaccess impossible to be modified by anyone whatsoever. I tried chmod ...
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0answers
11 views

Secure VMs on own cluster using Openstack and Ubuntu?

I recently got my hands on a bunch of old servers at work. The idea is to be able to deploy VMs across the cluster of machines and hand them out to people at my organization whenever they need a ...