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

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Can postfix receive emails on it's own?

I am configuring a Postfix server right now and want to clear up some things I am not quite sure about. For what I know Postfix is a MTA (Mail Transfer Agent) that can send and receive emails. That ...
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Document cannot be saved Samba file sharing

I recently installed ubuntu server latest version and started a file sharing server. My current problem is that Windows 7 and Windows 8 users canot save office files (excell, word and powerpoint). ...
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Ubuntu Server and Desktop GUI Simultaneously

[I am a Linux n00b.] I know that it is POSSIBLE to do this, and from my research, the drawback is just that your system is bogged down from the GUI. All I want to use my server for is hosting ...
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Failed to download repository information asking for internet connection (ubuntu 13.04)

During installation process of any application the message as "Failed to download repository information" comes asking to "check internet connection" with details as below: W:Failed to fetch ...
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Ubuntu 14.04 desktop doesnt see shared folder on Ubuntu Server. How do I fix?

So I am running a test Ubuntu Server to play around with it. I have samba running and even ssh. It works great on my Windows laptop and even my Android phone so far. The problematic machines being the ...
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1answer
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Unable to install mongodb

I try to install mongodb on server machine(Ubuntu server) using installing mongodb. When i used sudo apt-get update, i found 404 Not Found for many urls as the following errors: W: Failed to fetch ...
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2answers
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rsync error while transfering data from one server to another

I have 2 ubuntu 14.04 servers in vm in my machine.I logged in the 2 servers as the user chandhu, then by using sudo -i , I changed as root. I have one file in the user chandhu.I wanna to move that ...
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20 views

how to sent mail from my Ubuntu server

I am a beginner in mail server. I want to set up my own mail server so that I can send mail from my server to anyone. I have also installed postfix. How do I set this up? What do I need? How do I ...
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1answer
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Ubuntu 12.04 LTE update caused a kernel panic errors

3 days ago I've updated Ubuntu 12.04 LTE on our server (mainly to get new OpenSSL libs), rebooted, everything was fine. Then after 6 hours server stopped to respond. I rebooted again and it was works ...
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1answer
11 views

Why does this scp command fail? (Host Key Verification failed)

Today I learned that I can execute simple commands without actually ssh'ing into the target host. For example, when I run this commmand ssh target_machine ls /tmp The machine will ask for my password ...
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1answer
13 views

MySql won't start after installation on Ubuntu server 14.04.1

I'm new to Ubuntu server and MySql. I'm attempting to create a server in VirtualBox that I can use for web development and testing before deploying to a real server. I have Ubuntu server 14.04.1 ...
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Softwares for clustering of machines

I have taken up a project in which I have to setup a server(any kind of server) and desktop computers such that the server can use the processors of other computers for computations(or other tasks) ...
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1answer
18 views

SSH a Ubuntu Server with external ip

I have a Ubuntu server set up at my house and I am able to connect to it using SSH with its local IP. How can I connect to it from anywhere with its external ip?
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Enable graphics in headless server using VNC

How do I enable graphics acceleration support in Ubuntu Server 14.04? I am using VNC with simple Xfce window manager, and would like to run OpenGL enabled applications inside of it. The server has ...
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1answer
31 views

Iptables troubles

I used webwin for iptables management and reset the firewall over webmin (to clear out all the old stuff). I also disabled the feature Activate at book. After that I installed iptables-persistent for ...
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1answer
25 views

How to update Apache2 on Ubuntu 14.04 Server to the latest version?

I'm having some issues with a website I'm building. Avast is giving some false alarms when i'm accessing it so I checked with Sucuri. The only problem that Sucuri sees is that I have Apache 2.4.7 and ...
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1answer
19 views

maas juju how to power on a node

I am not getting the answer anywhere. Do I need to manually turn on the nodes ? or nodes will be turned on automatically ? if its automatic then what is the trigger ? and how will I shut down ? A ...
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How to use MAC address in host in icinga/nagios server on ubuntu?

I already install and configure icinga server on ubuntu. But I configure the all host IP in Manually. Now I want to add MAC address in the host replacing the IP address or removed the IP address. ...
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1answer
18 views

GPG error: http://it.archive.ubuntu.com trusty InRelease: Clearsigned file isn't valid, got 'NODATA' (does the network require authentication?) [duplicate]

apt-get used to work until a couple of days ago. Now I am banging my head on the wall with no avail. This is the output from a Ubuntu server 14.04 sudo apt-get update Get:1 ...
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33 views

Git access rights

I'm trying to add second user for remote shared repository Added group git dev, second user added to this group repository initialized with: git init --bare --shared=group sudo chgrp -R ...
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Setting a per user keymap on Ubuntu Server 14.04.1

I use Dvorak and my Wife uses QWERTY, It would be great if I could set it so that it switches when you change user. Is there anyway to do this? I can't find anything. Worst case can you set up ...
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24 views

SSH login glitched up

After I login to my server using ssh and PuTTY, the window closes right away. I'm currently connected to the window, because I was connected before, but when I try to type any command it shows this: ...
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How do I unlock my SSH keys on login in Ubuntu Server?

I'm making a new server that will pull backups from multiple sources on a schedule, so I'd like it to connect via SSH using a key. Setting this up in Ubuntu 14.04 Desktop is trivial, you write the ...
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How to resolve this fault when I try to start apache server?

I typed in following command to start the apache2 server : /etc/init.d/apache2 start then it gave me following error : * Starting web server apache2 (13)Permission denied: AH00072: ...
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How to resolve this error I got after PHP version upgrade “The apache2 configtest failed.”?

I'm using ubuntu Linux 12.04 LTS on my machine. I was using PHP 5.3.10 Now I upgraded to PHP 5.5.18 by using few commands on terminal. After I upgraded to latest PHP version I checked the version by ...
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telnet: Unable to connect to remote host: Network is unreachable

I am not able to connect to gmail with telnet using any of the ports. I am using this command: telnet smtp.gmail.com 25 and it gives following error: Trying 74.125.68.108... Trying ...
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8 views

Can't connect to SSH with new user

I created a new user, test. I have done the following to the account: I've given test sudo permission I've added test to AllowUsers in nano /etc/ssh/sshd_config I've generated a new SSH key pair, ...
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Connecting Via Mac Shared Works but Direct Connection to Server Does not

When I try to connect to my Ubuntu server from my macbook pro I have not problem doing so if I wait until the shared drive shows up under my shared drives section in finder. I can go in and edit ...
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1answer
8 views

Postfix can send but not receive mail

I just finished following this tutorial to set up a postfix mail server on ubuntu 14.04: https://www.digitalocean.com/community/tutorials/how-to-install-and-setup-postfix-on-ubuntu-14-04 When I ...
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6 views

Cannot get connected to FTP Server

I rented a vps for our company to perform backups. I installed vsftpd: apt-get install vsftpd No issues during installation. I then modified the /etc/vsftpd.conf anonymous_enable=NO ...
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12 views

Changing tmp directory fastest and safest way possible?

I have a Ubuntu server 14.04 that are running some popular game servers. I can't afford to take them offline for long (No longer then 30 minutes). I know there are multiple ways to do this, and the ...
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1answer
14 views

System tries to install grub on usb instead of ssd

I'm trying to install Ubuntu server on my storage server. The problem starts in partition manager when the system wants the usb that i'm installing it from to be the system hdd. I change it to the ...
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Problem with change of ServerName in apache2 web server

So I set up an apache2 web server & owncloud . We registered a free domain at *.homeserver.com and it worked pretty well, except the fact that we were not able to create a trusted ssl certificate. ...
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My server only booting on rescue mode

I have recently purchased a dedi from oneprovider everything went smooth I ordered an extra IP for the same server it was delivered, then after installing web server and control panel I performed a ...
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12 views

Can't start firefox on remote server without crashing X on local host

Running: Ubuntu 13.10 The situation is the following: I log in to the remote server with ssh -X user@remote and that is fine. However, once logged in, I type firefox it crashes the local X-session. ...
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VSFTPD Passive mode picking random ports

I'm trying to set up an FTP server behind a TP-Link TL-R470T+ router. I have set up port forwarding of port 21 and ports 6000-7000. This is the relevant section of my vsftpd.conf pasv_enable=Yes ...
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access denied from local host

Ok, I've set up my server and have been having fun designing my website. At the moment I've got several php files that access my MySQL databases. everything is ok client side and the php has no ...
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1answer
37 views

Juju Bare Metal 14.04 behind proxy ignoring proxy settings

I have installed Juju on my MAAS server (Ubuntu 14.04 LTS) and provided the following environment.yaml (debug output attached): http://pastebin.com/a02LnNbw When I run juju anything (bootstrap, ...
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MAAS node refuses IP address assigned to it by DHCP

I am trying to configure MAAS and Juju in a test environment. My MAAS region and cluster controllers are on a single machine with two NICs. eth1 is connected to a LAN with internet access; IP is ...
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upgrading libc in ubuntu

I am wondering if there is a way to upgrade libc and libstdc++ on ubuntu without installing a new version? I have an old distro and would like to upgrade to newer versions of libc if possible.
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1answer
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How to add DNS server in icinga/nagios server on ubuntu?

I already install and configure icinga on ubuntu.All host configure IP in manually.Now I want to add DNS in my icinga server. Actually, I want to add that keep to dynamic IP address in host. Now all ...
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1answer
25 views

Modern Ubuntu home media, security, and automation center [on hold]

I'm looking to set up a large computer to act as a home media center, a security system, and possibly home automation. I'd like the following features 64 bit support Modern (based on a recent ...
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How to get Contacam working on Ubuntu 12.04

I'm trying to get Contacam to work on Ubuntu 12.04. Apparently, I read online that the biultin server does not work. The native Linux Apache server must be used. It says to copy Apache file ...
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System partition full error but actual usage far from 100% (df -h)

I am setting up a home server with Ubuntu server 14.04. I recently setup nzbget and downloaded a few gigs of data before it complained about low disk space. The system is installed on 60 GB SSD with 3 ...
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1answer
35 views

Access Ubuntu SSH Server from Ubuntu Desktop

Hi I have a Ubuntu Server and I have configured public and private key on that server. Previously I was using Windows 7. So I just installed Putty and was accessing my Ubuntu Server from Windows 7 ...
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1answer
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2nd and 3rd disks mirrored for backup on Ubuntu Desktop

I wish to set up a small home server providing NAS and Web server functionality to my home network. I'd like to be able to store family pictures and other things I'd want backed up. So I had ...
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Determine number of SSL 3.0 Connections to Ubuntu Apache Webserver

In light of POODLE I would like to disable SSL 3.0 I'm aware that a number of clients use web services over SSL 3.0 because disabling SSL 3.0 has historically broken their integrations. I would like ...
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How to add dynamic IP address in nagios server on ubuntu?

I already install and configure nagios server with some host and service on ubuntu. I did the configure IP address manually in the host but now I want to add IP address dynamically in the host. How ...
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How to I add dynamic IP in Icinga server on ubuntu?

I already install and configure icinga server on ubuntu. I did the configure IP manually but now I want to add IP dynamically. How can I do it? Please given answer.
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14 views

Ubuntu Server sleep + wake at certain times, run program on wake?

I'm using a laptop running Ubuntu Server to run a Feed-the-beast server. I have all the files on the computer, and I can manually start and stop the FTB process through SSH. However, the server is ...