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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6
votes
4answers
13k views

What is Best NAS solution for windows workgroup? freenas or openfiler

we have small network of 15 computer. we want to store data in nas box with raid configured so that it can be accessed by all users. it will be document, excel, pdf and database files. what is best ...
3
votes
3answers
14k views

how to restrict ssh login to a specific ip or host

i want to restrict my ssh login only for one ip address so i modified the following file $ nano /etc/ssh/sshd_config and added this line (i.e. my ip ) hoping that it will work ListenAddress ...
2
votes
2answers
4k views

Running multiple versions of PHP on Ubuntu

Is there an easy way to run multiple versions of PHP on Ubuntu 10.04 (desktop), and switching between them? I am spoiled with the very easy installation and switching of PHP in WAMP for Windows. This ...
2
votes
2answers
4k views

Linux (Ubuntu) run script upon USB mount

I have a Ubuntu server with a external USB hard drive. I basically just want to run a script whenever the hard drive is plugged in. What would be the optimal way to achieve this ?
15
votes
3answers
49k views

How to setup a MySql server to accept remote connections?

I am installing a MySql server in Ubuntu desktop. I could connect MySql Query Browser to it when specifying the Server Hostname as localhost, but when I replace it by the machine's IP it stops working ...
8
votes
1answer
998 views

Configuring sudo to work without password

I'm trying to configure sudo to allow all users to restart apache without having to enter a password. Security concerns aside, why isn't this working? I added the line to /etc/sudoers: %admin ...
6
votes
2answers
11k views

How to change default runlevel of Ubuntu (lucid)?

I have Ubuntu lucid on my home computer. Today I was experimenting with runlevels and I couldn't figure out how to change the default run level of Ubuntu. I can do that using /etc/inittab on Debian ...
4
votes
1answer
5k views

How to create UDP proxy using iptables

I have a server running UDP server on port 50000. This server receives updates from clients, and pings back the clients every 5 seconds to the socket they were connected from. Now I want to redirect ...
3
votes
3answers
3k views

Comprehensive guide to init.d scripts?

I'm looking for good resources to learn more about how to write/debug/maintain init.d scripts on Ubuntu. Do you have any links or books to recommend ?
15
votes
6answers
47k views

how to auto start openvpn (client) on ubuntu 12.04 cli?

I have an *.ovpn file that works if I type in sudo openvpn client.ovpn Now I would like to start up openvpn when I boot the computer. It's a headless version of ubuntu - if that matters - 12.04 ...
10
votes
3answers
15k views

hosts file seems to be ignored

I have almost fresh Ubuntu desktop box. OS was installed two weeks ago and updated from karmic repositories. Last week I had no problems with DNS. But this week something had changed. I'm not sure ...
9
votes
3answers
5k views

nginx logging to access.log.1 instead of access.log, logrotate failing?

I have an nginx instance that is set to log access to /var/log/nginx/access.log and errors to /var/log/nginx/errors.log, but as soon as logrotate runs each week, the file gets moves to *.log.1 and the ...
9
votes
2answers
6k views

Ubuntu Linux: Process swap memory and memory usage

My Ubuntu eats more memory than the task manager is showing: sudo ps -e --format rss | awk 'BEGIN{c=0} {c+=$1} END{print c/1024}' 2750.29 free -m total used free ...
8
votes
2answers
2k views

Prevent the possiblity of writing data to an unmounted mount point directory [duplicate]

I have an Ubuntu server where I'm automounting an external hard drive each boot. To do this, I've created an empty folder on the root partition, and the drive gets mounted "inside" this folder. ...
8
votes
5answers
10k views

I just deleted “/bin”. What's the best way to recover?

I just ran (not on purpose!) rm -rf /bin. I've booted down the computer and am using Finnix to try to recover from it. I have succeeded in mounting the drive, and confirmed that, yes, the entire /bin ...
6
votes
1answer
5k views

PPTP VPN iptables firewall issues csf [closed]

I am having a problem with iptables and a PPTP VPN, I have read related topics both on hear and online but still can't get it to work! I am trying to set up PPTP on an ubuntu server on our local ...
6
votes
3answers
22k views

ssh client problem: Connection reset by peer [closed]

I'm having a really annoying problem on my Ubuntu laptop. I noticed it today, after upgrading to Ubuntu 11.04, although I'm not entirely sure this is the cause as I played with my ssh keys a few days ...
5
votes
1answer
4k views

ZFS on Linux/Ubuntu: Help importing a zpool after Ubuntu upgrade from 13.04 to 13.10, device IDs have changed

I have updated Ubuntu from version 13.04 to version 13.10, only to discover that the SATA disks IDs have changed, and my ZFS pool now fails. On new Ubuntu 13.10 the disk IDs are now ata-* instead of ...
5
votes
2answers
3k views

Ubuntu Kickstart installation using LVM waits for input

I have a PXE Boot Setup for installing CentOS 5 and Ubuntu 10.04 via Kickstart. I use LVM and installing CentOS without any user interaction works but Ubuntu always asks to "confirm to write changes ...
5
votes
8answers
7k views

Used/blocked ports in Ubuntu

starting up Glassfish AS would tell me the port 4848 is blocked (or any port that I configure). But checking the ports are not used. There is no firewall. root@ubuntu:~/glassfishv3/glassfish/bin# ...
4
votes
4answers
19k views

Ubuntu 14.04 System Logging

I've set up an Ubuntu 14.04 Server (from an Ubuntu 12.04 Server) but today I wanted to look in the auth.log but this file is not used. It seems that ´syslog´ was deleted. How does Ubuntu 14.04 log? I ...
4
votes
3answers
7k views

Bash prompt on Ubuntu - FQDN (\H) same as hostname (\h)

We've got seperate environments at my workplace for development, testing, integration, and staging. Within those envs, we've overloaded the hostnames in DNS - e.g. in the dev environment, the primary ...
4
votes
2answers
3k views

Recompile NGINX with “--with-http_stub_status_module” configure line

I've installed NGINX with sudo apt-get install nginx and now I'd like to recompile it with the configure option --with-http_stub_status_module. How can I do this, and is there a way I can not loose ...
4
votes
2answers
970 views

How do I install a package from Ubuntu Karmic onto Jaunty?

I'd like to know if the following is easy/possible/recommended. The version of Ubuntu I'm using (jaunty) has an out of date package that I need to upgrade: ...
11
votes
4answers
25k views

vsFTPd default uploaded file permissions on Ubuntu not working

I have a Server running Ubuntu 12.10 x64, and the last version of vsFTPd. My user example.com has its home folder set on /var/www/example.com, I created a public_html folder inside and gave 777 ...
9
votes
2answers
2k views

Where does Ubuntu store partition UUIDs on disk?

Exactly what part of the disk is a UUID stored on? MBR? Somewhere within the partition? Is it a calculated value, or randomly generated and recorded?
8
votes
5answers
5k views

Ubuntu : borked my sudoers file, how can I fix it?

I was editing my /etc/sudoers file and saved it but it has a syntax error in there. Now I can't 'sudo vim /etc/sudoers' because sudo thinks the sudoers file is not valid. How can I fix this?
6
votes
4answers
6k views

ssh_exchange_identification: Connection closed by remote host

Firstly, I know that this question has been asked a million times, and I have read everything I can find and still cannot fix the problem. i am encountering this issue when ssh'ing in from my mac to ...
6
votes
2answers
14k views

Expand disk space on Ubuntu 10.04 (VMWare Guest)

I need to resize the disk space of an ubuntu guest in VMWare Workstation. After using the expand disk utility in vmware workstation, I need to do some linux magic to resize the parition. I have ...
6
votes
5answers
18k views

ubuntu: let a user run a script with root permissions

I have ubuntu 8.04 and I want to write a bash script that runs as root which every user can run. I myself can do sudo. How do I do that? CLARIFICATION: I don't want to do it with sudo, because then ...
6
votes
4answers
17k views

Running lsof -i shows a lot of connections in CLOSE_WAIT ? Should I worry

So I am running lsof -i | wc -l periodically and it is telling me that out of 420 lines, between 240 and 255 are in CLOSE_WAIT state. How does TCP connections enter this state ? Should I be worried ...
6
votes
2answers
15k views

L2TP client for Ubuntu

It's easy enough to get a pptp client going on a Ubuntu 9.04 (Jaunty) desktop: sudo apt-get install network-manager-pptp However, I can't seem to find documentation find a corresponding L2TP ...
5
votes
4answers
2k views

Prevent SSH connection lost after logging into VPN on server machine

I encountered an issue that I can't deal with. When I'm logged onto an VPS over SSH and try to estabilish VPN connection on that VPS, the SSH connection between VPS and my machine get lost. I assume ...
5
votes
4answers
3k views

ubuntu - how can I avoid typing a password on every admin action?

I just set-up ubuntu 9.10 on my computer, and I'm trying to figure out how to avoid typing a password on every action that requires sudo privileges. I just want to type a password once on login and ...
4
votes
2answers
1k views

How to setup PXE boot server in CentOS

I am working on researching a project for work and thought that I would ask for your advice. I am trying to find out how to setup a PXE boot server within CentOS that would allow us to PXE boot a ...
3
votes
4answers
4k views

Cannot access javascript folder

I signed up and setup a small ubuntu VPS slice during the week and everything is going great so far, except one small problem. I have two virtual hosts setup but cannot access the javascript folder ...
3
votes
6answers
4k views

why ps aux is stuck?

I wonder on my staging server, whenever I run ps aux, it'll stuck. It outputs a list of process and stop responding. I checked there is enough RAM (1GB). When I run the top command, it looks ok to ...
2
votes
3answers
13k views

How to disable “sender non-delivery notification” in postfix?

I want postfix to stop sending non-delivery notifications to my local account, here is example from my log 17:47:08 A727B62C6F61: message-id=<20121124174708.A727B62C6F61@mail.***********> ...
2
votes
2answers
519 views

Restrict User Access to Certain Ports

This question is purely hypothetical. Is it possible to restrict which ports certain users may use for their processes? Say users1 gets ports 8000-8999 and user2 gets ports 9000-9999. I am running ...
2
votes
1answer
4k views

ive got dkim=neutral (bad version) header.i with gmail and dkim=fail (unknown key type) with yahoo

I'm having external ip and ubuntu server with exim4.71 and bind9. I'm trying to set valid dkim entry to send mail for gmail Here are my configuration files: bind9: _domainkey.example.com. IN ...
2
votes
1answer
2k views

stunnel: SSL-to-SSL? (for smtp/imap)

How can I configure stunnel to accpet SSL connections, and connect then to an SSL port on a different server? Here is my setup: Our ISP's server, "Mail Server", supports smtp/imap over SSL. (Not ...
2
votes
3answers
4k views

(How) can I use syslog to diagnose mysterious crashes?

I run a LAMP stack on Ubuntu server. Twice today it has ground to a halt and required a hard reboot. Prior to this it had been stable for many months. It has been about a fortnight since the last ...
1
vote
3answers
996 views

Two NICs, one server

I have two NICs on a fresh install of Ubuntu 10.04 LTS. Both are config'd be dhcp. Both cards are on the same lan with same gateway. everything about the cards is the same except the IPs they get, ...
1
vote
1answer
396 views

Ubuntu server 9.10 freezes up after ~10 minutes - unconventional

There is a topic by essentially the same name, but my answer leads to another question which I would like answered so... My case is as follows: I connect through SSH to my server... no problems for ...
1
vote
5answers
774 views

Encrypted file system on Ubuntu cloud server

Hi We have a cloud server (AWS) running Ubuntu 8.04. All the employees (around 15 people) in the company have system accounts in the server and all are sudoers. We want to provide a way for all the ...
0
votes
1answer
823 views

mod_vhost_alias VirtualDocumentRoot many domains

I'm sure I'm not the first person to encounter this problem, but I cannot, for the life of me, find an answer - although that could be down to not knowing what to search. I have the need to host many ...
0
votes
2answers
4k views

amazon ec2 pointing domain name to elastic ip and setup ssl

I am new to amazon ec2 however I managed to run EC2 instance and connect elastic ip to that. Now I bought a new domain name, I thought i need to use amazon route 53 service to point my domain name to ...
0
votes
1answer
503 views

adding DKIM signature to email where dkim=pass

I am building a e-mailing app and I am using Amazon SES API to send emails and long with that I am adding the DKIM signature to the email which are being sent. Presently the app is in the testing ...
0
votes
1answer
231 views

Amazon Instance Hung Up (Any Hope?)

I have very, very few users. I was scrapping some data today but that's usually not a problem. I've attached a screenshot of my instance stats. Everything has normalized and the instance is still ...
0
votes
2answers
131 views

Apache local verses external (domain)

I have an Apache server running on Ubuntu server 10, using Passenger for Ruby on Rails. I have configured my site under the sites-enabled directory of Apache and can hit the server with an internal ...