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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Is it secure to have port 3000 open to public on Node.js app?

So I'm running my node.js app on port 3000 on my ubuntu server and used this tutorial How To Set Up a Node.js Application for Production on Ubuntu 14.04 to use NGINX to run it on port 80. However port ...
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0answers
10 views

Not being able to SSH into server, working via WHMCS serial console

I'm running a VPS (Ubuntu 15.04) and a simple web page on it. Recently I noticed that the page is not available, so I tried to ssh in to the server. It timed out (Connection timed out) I logged in ...
2
votes
1answer
35 views

Forward SSH to another Host

I have an ubuntu server which is visible from internet, let's call it "jumper". And this server has this name actually because I need that whenever an user SSH this server, it jumps (or forward or ...
2
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0answers
12 views

POSTFIX:Must issue a STARTTLS command first. Email not being send from commandline ubuntu

I am trying to send email from the command line from my ubuntu server. So I started configuring the postfix onto my local machine rather than on server. So basically these are steps which I followed: ...
0
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0answers
18 views

How to view l2tp/ipsec clients

I have an l2tp/ipsec server. How I can list who is connected to server? I used to use last for ppp users using pptp. but that not working. I tired who too, but no luck. The only option I have is ...
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0answers
14 views

Fatal error: Call to undefined function simplexml_load_file() on Puphpet

I have just booted up a new VM using Puphpet, VirtualBox(5.0.14) and Vagrant(1.8.1). I am running on Ubuntu 14.04 with PHP 5.6.2 and am getting this error: Fatal error: Call to undefined function ...
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votes
1answer
29 views

Tips to have various server environments [on hold]

What all the tips you guys suggest to setup various server environment like development, staging and production? What all configurations I need to use?i am using Ubuntu, please tell me the recommended ...
1
vote
1answer
36 views

How to completely remove volumes/instances from OpenStack Kilo database

We're having some troubles deploying Kilo on a system with 3 controllers and 3 computes, through mirantis fuel 7.0. The problems involve creation and attaching of volumes, specially the ones stored ...
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2answers
35 views

Local network for websites

I'm a student doing an internship at the moment. I mainly develop websites using virtualbox and vagrant. I was wondering if i could like make the websites i build accessible for everyone in my ...
0
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0answers
13 views

Installing mailutils - Where is the configuration?

So I installed mailutils on Ubuntu 14.04 and was prompted to choose a configuration: https://assets.digitalocean.com/articles/postfix_sendonly/1.png I choice "Internet Site", and updated php.ini ...
0
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0answers
19 views

cannot boot fresh installed ubuntu server 16.04

I installed ubuntu server 16.04 from a USB stick. At the step of installing GRUB boot loader. I can choose which disk I want to install it. /dev/sda, is the usb drive. /dev/sdb, is the hard drive ...
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0answers
9 views

Uploading files from a Webserver to GlusterFS?

So the question is exactly what the title suggets. If I have a dedicated server set up using GlusterFS... How would I transfer a file from the web server (that is using Nginx) to GlusterFS and more ...
0
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0answers
22 views

Can't modify $_SESSION Unknown: write failed: No space left on device (28) in Unknown on line 0

When I try to assign a value of $_SESSION $_SESSION['whatever'] = "test"; I get Warning: Unknown: write failed: No space left on device (28) in Unknown on line 0 There is enough space on device, ...
0
votes
0answers
14 views

optimize apache for high latency satellital internet connections

I have an Apache server delivering a web app, the clients are in remote areas using satellite connections, this connections are in the range of 3mb downlink, 1mb uplink, but they have high latency ...
0
votes
0answers
14 views

PHP 7 and Apache2

I am using Ubuntu 14.04 and just tried to update from PHP 5.6 to 7 - everything worked fine and when I type in php -v I get this PHP 7.0.5-3+donate.sury.org~trusty+1 (cli) ( NTS ) Copyright (c) ...
0
votes
1answer
44 views

Ubuntu Anonymous Samba Share Now Not Accessible From OSX Machine

I have an OSX machine which has been connected as Guest to a Samba share on my Ubuntu machine. It's no longer connecting. When I click 'Connect to Server...' in Finder, and enter ...
0
votes
1answer
15 views

DNS caching with BG updates

I am looking for a solution for Ubuntu server to use DNS caching that. if it has the record and is not expired (either in cache or in local definitions) return the record if it has the record and is ...
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votes
2answers
22 views

(Ubuntu Server) Why does /usr/bin/node --version show v6.0.0 when /usr/bin/nodejs --version show v4.3.3?

I recently had nodejs v6.0.0 installed. I ran sudo apt-get remove nodejs and reinstalled the LTS version using curl -sL https://deb.nodesource.com/setup_4.x | sudo -E bash - sudo apt-get ...
0
votes
0answers
7 views

ubuntu 16.04 blank screen at bootup [migrated]

I am having a problem when booting up Ubuntu (both 15.10 and 16.04). I am getting the following error: $ cat ~/.xsession-errors openConnection: connect: No such file or directory cannot ...
0
votes
1answer
68 views

I can't get the right items to boot on ubuntu-16.04 and systemd

I needed to make a new image and opted for the new 16.04 ubuntu so I could get newer versions of some packages and not install from source. So far, I regret that decision as online docs are sparse. ...
0
votes
1answer
19 views

Can't mysql_secure_installation a fresh MariaDB on fresh Ubuntu 16.04 LTS

I am trying to run mysql_secure_installation on a fresh install of MariaDB on a fresh Ubuntu 16.04 LTS server. I installed via the exact instructions found here. When prompted for Remove anonymous ...
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0answers
20 views

IPv4/IPv6 dualstack setup in Debian/Ubuntu via preseed

I use preseed to provision my Ubuntu 16.04 installation. It has the following options to set up IPv4 or IPv6 address # Static network configuration. # # IPv4 example #d-i netcfg/get_ipaddress string ...
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0answers
20 views

Google Cloud Server becomes unresponsive [on hold]

Google Cloud Server becomes unresponsive after start a grade build (Ubuntu 14.04.3 LTS), when I look at the console, the Disk I/O bytes (Read) is very high. I wait for almost an hour and nothing. The ...
1
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1answer
22 views

502 bad gateway errors after 68 concurrent users to website

I'm running into issues while doing some stress testing in jMeter. Essentially, we're hitting a hard limit of 68 concurrent users. As soon as the test ramps up to that number of users, we're getting ...
0
votes
1answer
23 views

NRPE agent on remote sever not starting with nrpe_user

I am trying to start nrpe agent on remote server. As per the configuration (nrpe_user=nagios) nrpe must run under nagios user like: root@workingIP:/etc/nagios$ ps -ef|grep nrpe nagios 3748 1 ...
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0answers
9 views

Open Build System error, nothing provides dh-systemd(>=1.5) in Ubuntu 16.04 repository

I am trying to build a custom nginx package for Ubuntu 16.04 [link to my project]. I created my gpg signed files to be uploaded using the command Code: debuild -S -sa -k'mygpgkey' and uploaded ...
2
votes
1answer
14 views

Migrate/transfer from zimbra collaboration server GA 8.0.0 (zcs) to recent zimbra(zcs) GA

Im using zimbra zcs 8.0.0 GA on ubuntu 12.04LTS , is it possible to migrate the settings/mailboxes from old zimbra to "new zimbra server". The new server have ubuntu 14.04.4 x64bit installed with ...
0
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0answers
25 views

Uncaught Error: Class 'Monolog\Logger' not found

I use PHP 7.0 on Apache 2.4.20 and Ubuntu 16.04 LTS. I have followed this guide to have upload functionality and would like to know what I can do to fix the following error that I receive: PHP ...
0
votes
0answers
10 views

permission denied with full volume on mhddfs and SAMBA

I use MHDDFS to join 3 disks together so that my fileserver can present one large volume over SAMBA in stead of three small ones. The relevant part of fstab: # Data store disks # 2TB_Disk1 ...
0
votes
1answer
28 views

Can't start docker on Ubuntu 14.04: Job failed to start

I'm trying to installed Docker on a Vagrantbox with Ubuntu 14.04 using the instructions on the official website (Docker Docs). The installation seemed to work, but afterwards I can't start the docker ...
0
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0answers
24 views

Open LDAP Server migration

Im trying to migrate an Open LDAP Server from Ubuntu LTS to Arch Linux. So I followed the Guid by Alex Pánek. So first I backuped the Databases from the Ubuntu Maschine: ubuntu$ sudo slapcat -b ...
0
votes
1answer
18 views

How to monitor docker container restarting behavior?

currently I'm hosting several containers using Docker and realized that some containers seem to keep restarting by themself. When using the command, docker ps -a, I saw the column status is always ...
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0answers
19 views

Building large RAM Computing Server with a limited budget (Bioinformatics) [on hold]

In my institution, there is a lot of talent available, but for computing we only have a handful of rather old servers available. My expectation is that many institutions do have the budget to buy ...
1
vote
2answers
59 views

Is it safe to manually edit /etc/passwd?

I need to change the "real name" of a user (not the username). For example if I have: testuser:x:1001:1001:Max Mustermann,,,:/home/testuser:/bin/bash And I want it to be: testuser:x:1001:1001:Max ...
0
votes
1answer
14 views

Create vxlan - RTNETLINK answers: Operation not supported

I knew nothing of vxlan until about 30 minutes ago, however I've come up with an issue installing OpenStack, which is vxlan related. Trying to create a vxlan on an interface on Ubuntu 14.04 (kernel ...
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votes
1answer
22 views

How can I only allow TCP connections for 1 port using iptables on Unbantu? How can I also set a maximum packet on a connection?

I'm running a server for public. I just want to allow TCP connections and I want to limit the packet to prevent ddosing a bit and setting a maximum IP/new connections per seconds with iptables. How ...
1
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0answers
37 views

samba4: session setup failed: NT_STATUS_UNSUCCESSFUL

I am having trouble with my samba4 installation. For a long time it has been working without issue. I use webmin to configure users and although the module is only supposed to support samba3 it works ...
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votes
0answers
55 views

Ubuntu 16.04: set systemd for meteor service [closed]

i'm have a vps with ubuntu 16.04 and i following this guide for install nginx + meteor. ...
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votes
0answers
14 views

How to set up a website accessible over internet? [closed]

I'm running Apache2 on Ubuntu Server. For simplicity, I removed all the routers in between. Presently, my server is directly connected to the internet. All I want is this - I run curl 127.0.0.1 to ...
0
votes
0answers
13 views

switch not giving desired dhcp leases [closed]

Our college has one router. a switch at each hostel floor. now if this router is disconnected from the switch then switch assigns IP addresses in the range of 192.168.x.x but if the router is ...
0
votes
0answers
4 views

freenx on ubuntu does not start

I followed the procedures Here to install and configure Freenx. The only thing I did different was to create a user, since the machine only had root. For some strange reason when I start the service, ...
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votes
0answers
3 views

Virtualbox Guru Meditation error when starting an Ubuntu 16.04 guest on OSX host using vagrant [migrated]

Host OS version: OSX El Capitan 10.11.4 (15E65) Virtualbox version: 5.0.18r106667 Vagrant version: 1.8.1 My vagrantfile looks like 1 Vagrant.configure('2') do |config| 2 config.vm.box = ...
0
votes
1answer
10 views

Dhcp Classless Static Routes hook error

I have a dhcp server that hands network information to vms of mine. It works fine for centos6,7 , and debian 7 clients. However it fails for Debian 8 and Ubuntu 16.04 clients. For the ones where it ...
0
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0answers
11 views

PowerBroker (PBIS) login issues

I'm having an issue with logging in with PowerBroker, my Ubuntu 14.04 client machine is able to authenticate with the domain and show's in my AD. I can use the find-user-by-name etc, which returns the ...
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votes
0answers
12 views

How to test Xen-Hypervisor performance [closed]

I need you guys help to do my term project of cloud computing class. Firstly, I have Ubuntu 14.04 and Xen 4.4 installed (finally, after days) on my system. My processor supports the virtualization. ...
0
votes
1answer
20 views

How to suppress file output from aws s3 ls?

I am using the aws cli to summarize the number of files and the total size of an s3 bucket using the following command (documentation): aws s3 ls s3://mybucket --recursive --human-readable ...
0
votes
1answer
26 views

Codeigniter: website have too many redirects

I have developed a webportal in codeigniter framework,but when i try to host in a shared hosting server i will get this error. wwww.abc.com redirected you too many times. ERR_TOO_MANY_REDIRECTS ...
0
votes
1answer
28 views

Ubuntu - SQL Server 2012 - Microsoft ODBC Driver 13 - Error: 18456, Severity: 14, State: 8

I have been attempting to get "Microsoft ODBC Driver 13 for SQL Server" running in Ubuntu for two days now, and I am out of ideas / have exhausted Google. My test machine is a vagrant VM, and these ...
0
votes
1answer
21 views

Why are group permissions different when using mkdir and mkdir -p?

I'm trying to make new files and directories within a directory always have the same permissions and group. I've done this: cd / sudo mkdir apps sudo chown deploy:www-data apps sudo chmod g+s apps ...
0
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1answer
28 views

Configuring apache2-mpm-worker with php5

I have a ubuntu 14.04.4 server box and I have installed apache2 and php5 packages but after enabling mpm_worker and restart apache I got following error " Apache is running a threaded MPM, but your ...