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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HowTo: Let ufw block single IPs when default policy is ALLOW

I want to be able to block certain IPs from accessing my server. As I don't really know what services are running on what port on the machine, I decided to quick&dirty let ufw's default policy be ...
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2answers
45 views

Can I update Ubuntu with active users logged in?

I would like to run apt-get dist-upgrade, but I don't know how this will affect the currently logged in users. How can I find out: 1. will a restart be required 2. will the system be ...
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19 views

Low disk I/O causing high disk busy and CPU wait

I have an Ubuntu 10.04 server on VMware that is experiencing 99% disk busy with only 1 MB of disk I/O according to nmon. 300 KB of disk I/O causes 25% to 30% disk busy. iostat reports the same: ...
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1answer
49 views

ls showing “no such file or directory”

Could someone please explain this to me? [rabdelaz@Linux_Desktop:/etc/apache2]$sudo ls /var/log/apache2/*.log ls: cannot access /var/log/apache2/*.log: No such file or directory ...
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1answer
54 views

Supervisor program not found

I create a test here: vi /etc/supervisor/conf.d/test.conf It looks like this: [program:sentry-test] command= echo "hello there" I then run the command with the output: supervisorctl reread ...
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1answer
52 views

iptables DROP statement causing issues

iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A INPUT -p tcp --dport ssh -j ACCEPT iptables -A INPUT -p tcp --dport 80 -j ACCEPT iptables -A INPUT -j DROP I have the ...
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2answers
2k views

Need help configuring Sendmail relay/Connection refused errors

I am running Ubuntu 10.04 with Sendmail in a VMWare VM. In my mail.log file I have thousands of Connection Refused errors, and I'd like to get rid of them. There are multiple errors each second and ...
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1answer
75 views

Unable to install/remove any package on ubuntu 10.04

When i tried to install curl or any other package on VPS i got the following error: root@vs3946:/var/www# apt-get install anypackage 0 upgraded, 0 newly installed, 0 to remove and 0 not ...
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1answer
119 views

Plain-text login with sendmail and SASL, Ubuntu 10.04

I'm trying to configure sendmail with a smarthost. I mostly followed this guide (although I understand it is written for Scalix). SMTP server uses plain-text authentication. However, when sendmail ...
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1answer
70 views

gro on with ethtool - Ubuntu 10.04 Server LTS

On Ubuntu 10.04 server LTS, I can't enable generic receive offload with ethool (v. 6git) # sudo ethtool -K eth0 gro on Cannot set device GRO settings: Invalid argument If I try instead to set the ...
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2answers
1k views

Ubuntu running Apache Server (Prefork) PHP Fast-CGi High CPU Usage

I have a server running very slowly due to high CPU usage. I think this must be a configuration issue but I can't put my finger on why. The server is running Plesk and I've configured PHP to run as a ...
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336 views

Diagnose SASL LOGIN authentication failure with postfix and sasldb

I am trying to configure a Postfix SMTP server on my personal machine (ubuntu server) using sasldb2. So far what I have set up works well with the test command: testsaslauthd (however it may be ...
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2answers
176 views

Subversion repository size & backup file difference

A subversion repository size of 5.2 GB with 339 revisions. When I run the backup using Perl script the end result of file size was 28 GB. Can I know, how this could be possible. I am confused. ...
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54 views

Which Log file to check for strange Ubuntu server behaviour (offline for 5minutes at random times)

I am having problems with my Ubuntu 10.04.4 LTS server. My monitor application claims it goes off every morning at about 4 AM for 5 to 10 minutes. I am not sure where to start the troubleshooting ...
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294 views

Monit system cpu usage

Monit version: 5.0.3 Server: Ubuntu 10.04.4 LTS I want to monitor the system cpu usage with Monit and I am trying as follows: check system host_name if cpu usage (user) > 70% then alert if ...
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62 views

__ticket_spinlock high cpu

We are having a strange problem on our Ubuntu 10.04 KVM infrastructure, where periodically, one of two vm webservers freaks out, with persistently high load, even if we restart the applications. (the ...
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1answer
50 views

Where can I find the file to set SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS

Title says the question. I am having difficulty finding the file (and am aware that it is disabled by default with SSL_OP_ALL). I am aware that the location will vary from server to server, but it ...
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1answer
99 views

Is it better to enable or disable SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS?

Title summarizes my question best. I am trying to make my ubuntu 10.0.4 server PCI compliant, and to do so, the last bullet on the list is to make sure it isn't vulnerable to the BEAST attack. To do ...
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142 views

How to solve UNIQUE_ID variable issue in modsecurity_crs_16_session_hijacking.conf ubuntu 10.04

I have been trying to harden ubuntu 10.04 using modsecurity and its core rules from owasp version 2.2.5. I have used the package from their github . After the symbolic link of the files in the ...
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1answer
106 views

Ubuntu 10.04LTS Server under attack, random reboots UNTIL I blocked China

What could have been sent to my server to cause it to reboot? Details: I have a for-internal-use LAMP server running Ubuntu 10.04LTS (upgrade is scheduled for that nebulous "when I have time"). It ...
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1answer
106 views

segfault: ubuntu (10.04.4 amd64) and wkhtmltopdf

Older (0.10 & 0.11) builds and the current (0.12) one of wkhtmltopdf stopped working on ubuntu (10.04.4 server amd64) systems since the latest kernel update. It seems wkhtmltopdf tries to read ...
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279 views

Can't connect to proftpd from outside the virtual machine

This is related to a previous question. I have a machine with Windows 7 acting as a server and it hosts several virtual machines. One of them, a Debian Squeezy is acting as a PostgreSQL server and I ...
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66 views

Linux server crashing (drm:drm_fb_helper_panic)

We have a server (IBM x3850 8864) running Ubuntu 10.04 LTS. It's acting as a KVM host with several virtual machines on it (also running Ubuntu 10.04). The (physical) server sometimes crashes with ...
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1answer
2k views

Postgresql 9.3 installation fails

I'm trying to install postgresql 9.3 in my ubuntu lucid machine. The problem is that I'm getting this error when running apt-get install postgresql-9.3 => apt-get install postgresql-9.3 Reading ...
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1answer
59 views

CRON job running but no sign of it in any file

This is an odd one and I know that the answer will be something simple that I have over looked... I have inherited responsibility for a Linux server running an old version of Ubuntu 10.04, it has a ...
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2answers
302 views

Is someone sending me mails via my own server? (Plesk relay)

On my Ubuntu server, I use Plesk to manage email accounts, among other things. Emails to info@mydomain.com are automatically forwarded to myname@gmail.com. No problems so far. But today I received ...
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104 views

Windows XP cannot join (samba) domain

I've a setup with Samba 3.4.7 on Ubuntu 10.04 running as Primary Domain Controller for the network. [Almost] everything works fine, except for a single Windows XP computer which cannot join the ...
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1answer
52 views

If I have a DocumentRoot specified in my VirtualHost, do I need a <Directory> specified?

I'm using a somewhat default-looking VirtualHost file that I configured a while back (before I had much knowledge of how this stuff works), and I'm not exactly sure what I should keep around. I don't ...
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1answer
259 views

Canvas and Apache Permission denied

I'm setting up a test server for canvas-LMS. However when I try to access it after following all the steps in the production start guide to install all the requirements and do all the initial setup I ...
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1answer
333 views

Mysql can't create user / grant privileges on existing ones (access denied)

After installing Mysql through apt-get on Ubuntu 12.0.4 LTS and messing around with it I'm in the position where I have no account that can do any operation to grant privileges or create a new user. ...
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1answer
297 views

Error installing Oracle-Java6

I'm attempting to install Oracle-Java6 on my VPS, running ubuntu-10.04 for the purpose of running Openmeetings. I installed the ppa webupd8team/java, updated and ran sudo apt-get install ...
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2answers
132 views

Apache processes stuck in “write” state

My apache server is producing lots of processes in "write" state until all slots are filled and the whole webserver hangs. Here's what I got: root@viking:/# uname -a Linux viking 2.6.32-51-server ...
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2answers
2k views

How to build & install pgsql PHP extension manually on Ubuntu

I've searched high and low and haven't found anything. Perhaps I don't know what to search for. Environment is Ubuntu Lucid (10.4) with PHP 5.2.4 & PostgreSQL 9.2. PHP is "held" at 5.2.4 with ...
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2answers
60 views

Copying subversion repository to new shared drive

We are migrating our data to a new H-NAS server. So, I planned to move our subversion repositories to a shared drive in the H-NAS server. Instead of moving the data using svnadmin dump ...
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280 views

racoon pure IPSEC VPN, best way to give vpn server an IP address on the VPN?

We are testing a VPN server for DR. We have a rackspace cloud instance, with a pure IPSEC VPN server running in racoon, serving "road warrior" clients. We have some NAT going on on the server to route ...
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1answer
129 views

NFS File Sharing issue in NAS

We bought a new H-NAS Server and running fine. We created 500GB of space for our subversion repositories and the nfs share has been created. When I create a new directory the owner and group shows as ...
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1answer
26 views

Installation issue in Ubuntu

i wanted to install ufw in my ubuntu 10.04. but, when i try to instal ufw the apt-get installer stalls my progress by trying too install my-sql server, which i dont want to install right now. Is ...
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1answer
706 views

Best practice for setting up RVM, Passenger/Apache with multiple Rubies and running as specific users?

My goal is to run ruby applications under different server users with potentially different versions of ruby. So i would have users that serve as the "hosting account" essentially. Document ...
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1answer
1k views

apache2 not starting at boot. Even if set up in runlevels

On my Ubuntu 10.04.4 server apache2 2.2.14 is installed. A few months ago starting apache2 at boot worked fine. Now I've found out that after a reboot apache2 doesn't start automatically anymore. ...
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2answers
2k views

apache2 hanging on “Sending Reply”/“Gracefully Finishing”

On my Ubuntu 10.04.4 server, apache2 2.2.14 eats up all the memory until there is no more left because it isn't shutting down old instances. The server serves a small webpage which gets about one ...
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1answer
231 views

Server responds to pings but no SSH or HTTP access

I do not know what has caused this but my websites have been down for 2+ days now and I cannot connect via SSH or FTP either. The only way to get signs of life from my server is to reboot it via the ...
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1answer
161 views

IPTables quota not working on Ubuntu 12.04

I've been struggling porting IPTable rules from Ubuntu 10.04 to Ubuntu 12.04. The problem is that quota seems to be broken. Take this very simple instance of a quota rule. iptables -t mangle -A ...
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1answer
145 views

Blocking a service to countries with UFW

I am using UFW trying to block SSH access from multiple countries. I have been successful completely blocking access but I need a refinement: The server needs to allow world access to other services ...
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1answer
93 views

Trying to differentiate between two identical NIC's on midly diff Linux laptops

The helpful commands for dissecting loaded devices /NIC's Beyond dmesg, there is a set of commands I can't remember, that illustrate details about LINUX devices specifically NIC's, lspci is one of ...
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1answer
200 views

Upgrade Ubuntu Kernel from command line

I am running Ubuntu 10.04 on my server. It has Ubuntu kernel 2.6.X running on it. I was trying to update my kernel yesterday. For that I had run the following commands sudo do-release-upgrade -c ...
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1answer
185 views

Error creating directory: Operation not permitted, can still create files, permissions are correct

I have a directory mounted over FUSE/SSHFS. It's an Ubuntu 10.04 client connected to an Ubuntu 10.04 server. My user has write permissions for the directory in question, and has been able to create ...
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1answer
150 views

download the torrent file contents to my linux server

I want to know how can I set up bit torrent client on my web server, I found this article http://www.cyberciti.biz/tips/linux-command-line-bittorrent-client.html but ...
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1answer
69 views

Unrecognized characters in a genereted index of a directory

I have some files on a server with non-ASCII names and when I'm browswing the apache-generated index of a directory, the non-ASCII characters are not recognized (shown as ?). I've added instructions ...
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248 views

configuring ldap client in ubuntu ( Bad file descriptor error )

I am configuring ldap client in ubuntu. I am following this tutorial link to configure the ldap client. But, When I try to update nss to use ldap, I am getting an error. That is, root@sat:/# ...
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1answer
918 views

Can connect to ubuntu server with Putty but can't via WinSCP

I have just updated from 8.04 to 10.04 after such a long time I am rather excited. But since the update I am now unable to login to my server via winscp but a connection with putty is still completely ...