Tag Archives: ubuntu

Webmin

In this post I outline a very easy setup process to add a web GUI to your linux server. There is really 2 easy steps:

Install the dependencies:

 

$ sudo aptitude -y install perl libnet-ssleay-perl openssl libauthen-pam-perl libpam-runtime libio-pty-perl libmd5-perl apt-show-versions libapt-pkg-perl

 

Install Webmin

 

$ wget http://downloads.sourceforge.net/project/webadmin/webmin/1.510/webmin_1.510-2_all.deb?use_mirror=cdnetworks-us-1
–2010-05-22 19:53:44– http://downloads.sourceforge.net/project/webadmin/webmin/1.510/webmin_1.510-2_all.deb?use_mirror=cdnetworks-us-1

$ sudo dpkg -i webmin_1.510-2_all.deb

 

Accessing the Web GUI

Just put this in your favorite flavor of web browser:

https://<IP ADDRESS>:10000/

 

Enjoy and if you have any questions comment or send me a message on the contact me page

Source:
http://www.kelvinwong.ca/2010/05/22/installing-webmin-on-ubuntu-server-10-04-lts-lucid/

Upgrading Linux Versions 10.04 to 12.04

This is a simple process to upgrade from the 10.04 lucid to the newest 12.04 Precise Pangolin.  If you wish to force your LTS version to upgrade before the scheduled July force upgrade there are two simple commands:

do-release-upgrade -d

 

update-manager -d

Then there is a simple installation process to upgrade it.  If you have any further questions just comment and I will get back to you.

Updating Splunk (version 4.2.4)

To update your Splunk server the process takes no more than 15 minutes. Here is the process:

Back up the server as always and if you did the installation as I described in my previous post this setup will work perfectly:

wget -O splunk-4.2.4-110225-Linux-x86_64.tgz 'http://www.splunk.com/index.php/download_track?file=4.2.4/splunk/linux/splunk-4.2.4-110225-Linux-x86_64.tgz&ac=&wget=true&name=wget&typed=releases'

/opt/splunk/bin/splunk stop

cd /home/user

mv splunk-4.1.7-95063-Linux-x86_64.tgz /opt/

tar zxfp splunk-4.1.7-95063-Linux-x86_64.tgz

/opt/splunk/bin/splunk start



After that just agree to the terms and test out the new functions and features of 4.2.4. Enjoy!

X-box Media Center (XBMC)

I recently have developed a server to just stream my videos to my XBox 360. Using the help of some forums and crazy tinkering this is the results.

Installing on Ubuntu 11.04

Using the newest version of Ubuntu (11.04) I installed the XBMC with ease with some helpful instructions and commands (XBMC is also available in Windows OS and a few others). Here are the commands:

sudo apt-get install python-software-properties pkg-config
sudo add-apt-repository ppa:team-xbmc

Then go to the Package Manager. Click Settings -> Repositories. Under Other Software, highlight the XBMC PPA and click Edit. For the distribution, change it to maverick.

sudo apt-get update
sudo apt-get install xbmc xbmc-standalone
sudo apt-get update

Setting up Video Sources

Following this you have installed XBMC, now it’s time to tweak it slightly. First you need to go to the Video section and add a source. You need to keep your sources clean and have one source be your Movies and one your TV shows and such. Once you add a source through either SMB or FTP or many many other settings you can then tell XBMC to scan and add internet content to it such as the trailers and actors to organize your collection better.

Making Content Able to Be Streamed

Following the setting up of the sources you need to make it streamable to the XBox. This is KEY. In Settings -> Network -> Share video and music libraries through UPnP. Once you check this box all your content will be magically seen from your X-Box 360 under the Video Libraries application.

Auto Updating Your Sources

Finally you need to make sure this server doesn’t need to be touched in years. There is an add-on that will make it so that if you change your content in one of your video sources your XBMC will recognize the change and add it to your media collection on your X-Box. You need to go to Settings -> Add-Ons ->XBMC Library Auto Update. In here you install the add-on then click on it again to configure it to auto-update by intervals of hours. After you do these steps you will almost never need to touch your server again.

Note: If this is a VM you are making this server into, it will be SLOOOW. I have installed the VMware tools and updated all video drivers, but the hardware acceleration needed to display the XBMC’s GUI is too intensive for the VMs display quality. Another note, I attempted to use a Win 7 VM first. That did not work at all as running the XBMC doesn’t even work because it replies with an error caused by displaying XBMC through a remote desktop program, which is unavoidable through a VM program.

Thank for your attention and I am always up for comments.

Sources:
http://magvar.wordpress.com/2011/05/15/xbmc-running-on-ubuntu-11-04/

Splunk Syslog Server

The idea of a syslog server is simple, it has many devices send it all their logs of its activities. Then the administrator can access the server and views recent information, warnings, or crashes. This is key to making a network function and keep accurate records. When you start seeing a random outage you can now simply access one machine and have all the logs and have them accurately tell you where the problem started and then grew to all in simple charts and event logs.

There are plenty of choices of syslog servers out there, but I am using Splunk Syslog Server as it seems to be:
1) Flexible for many forms of devices
2) Has add-on plugins to make it more fucntional
3) Is an active project (meaning it still has updates and will not break in a few days and no one knows about the server at all).
4) Linux based (which is also currently running on all my servers, so little to no platform change)
5) FREE

Installation on Ubuntu-64 bit:

Step 1 – Download:

sudo wget http://www.splunk.com/index.php/download_track?file=4.1.7/linux/splunk-4.1.7-95063-linux-2.6-amd64.deb&ac=&wget=true&name=wget&typed=releases’

Step 2 – Rename to a working format:

sudo mv download_track\?file\=4.1.7%2Flinux%2Fsplunk-4.1.7-95063-linux-2.6-amd64.deb\&ac\=\&wget\=true\&name\=wget\&typed\=releases splunk-4.1.7-95063-linux-2.6-amd64.deb

Step 3 – Install:

sudo dpkg -i splunk-4.1.7-95063-linux-2.6-amd64.deb

Step 4 – Start the service:

sudo /opt/splunk/bin/splunk start

Configuring the Server:

Step 1 – Getting a device to send syslog to the server:

I have a Cisco device and so there are 3 commands to issue in the router itself to get it to send the server valid logs:

Router(config)# logging on
Router(config)# logging [ip address]
Router(config)# logging trap [emergency | alert | critical | error | warning | notification | informational | debug]

The first command simply turns on logging ( Simple enough). Second, defines where the logs will be sent. Point this to the new Splunk Syslog Server. Third, this is an optional command that will define what level of syslog will be sent. Example, if you informational level then the logs will be sent only with the levels of emergency to informational.

Step 2- Configure the Splunk Server to receive logs:

First go to a web browser on your network and surf to your server’s IP and port 8000 (Example: 192.168.1.50:8000).

Splunk Manager

Once you get to this screen click on “Data Inputs”

Splunk Data Inputs

From this screen click on the Add New button which is right from UDP

Splunk UDP Ports

From here you type 514 in the UDP Port Field, use the drop down under Set Sourcetype to From list, and finally under select source type from list you select syslog. Now you have a port open and the server can identify the type of data.

At this point we have data going into the server, but we don’t have it being displayed in any fashion, let’s fix this. Back on the manager screen you can click on Searches and Reports, from here you can select the button new. In this screen you can define the search parameters, the name is just a title for your purposes the search field is where it gets fun. Some of the strings to put in would be host=”192.168.x.x” (The address of device) or source=”udp:514″ (To see all traffic coming through to your port 514). These are very simple searches, but effective. Then type in a description and hit save. After this head on over to the search app and on the top menu there is a Searches & Reports tab, drop that down, and you’ll find your new search. Hit it and the search will run and display the logs of the desired device. With a little extra tweaking you can create your own dashboard of information via the views tab and get something like this:

Splunk Data Output

Step 3 – Start on boot-up

This is key to keep your syslog server working before and after a power outage or simple shutdown.
sudo /opt/splunk/bin/splunk enable boot-start
Once you type in this final command you should be ready for a production syslog server.

This concludes the post on Splunk Syslog Server and the completion of this project. Thank you for your time.

Helpful Sites:
http://www.splunk.com/
http://www.cisco.com/en/US/products/sw/cscowork/ps2073/products_tech_note09186a00800a7275.shtml
http://ubuntuforums.org/archive/index.php/t-900745.html