Moki Systems Blog » System Administration http://www.mokisystems.com/blog Addressing such topics as: web programming, design, ruby on rails, cake php, postgresql, linux, seo Thu, 19 Aug 2010 00:18:50 +0000 http://wordpress.org/?v=2.8.4 en hourly 1 SSH Host Aliases http://www.mokisystems.com/blog/ssh-host-aliases/ http://www.mokisystems.com/blog/ssh-host-aliases/#comments Tue, 18 Nov 2008 16:39:59 +0000 Wes Bangerter http://www.mokisystems.com/blog/?p=42 If you use SSH from the command line you can save yourself some typing by aliasing the servers hostname to something shorter. There’s a bunch of different ways to get similar results, but I prefer to use the built in SSH functionality for this. Create a ~/.ssh/config file. The syntax is:

Host server
HostName server.example.com
User username
 
Host another
HostName another.example.com
User username

Now you can just ssh server instead of ssh username@example.server.com. SCP also works great with these aliases, just scp file.txt server:/path

You can leave the User part out of the config file if your local and remote usernames are the same.

]]> http://www.mokisystems.com/blog/ssh-host-aliases/feed/ 0 How We’re Using VMWare Server http://www.mokisystems.com/blog/how-were-using-vmware-server/ http://www.mokisystems.com/blog/how-were-using-vmware-server/#comments Tue, 15 Jul 2008 18:23:47 +0000 mark http://beta.mokisystems.com/blog/?p=9 VMWare releasing a free version of their server virtualization product opened up some possibilities for us. Moki Systems had multiple servers performing a variety of tasks but there were things we didn’t have. We didn’t have a split between production and development servers and we didn’t have good utilization. Low CPU and memory utilization offers a comfort level but it adds costs, especially when you need more servers that cost money, use electricity, and generate heat.

Free VMWare server limits running virtual servers to 4. Our solution was to purchase new servers equipped with 1 SATA disk for the OS and 4 SCSI disks, 1 for each virtual machine (VM). While VMWare offers an option to write to the disk directly I opted not to do that because the virtual disk files VMWare uses make your VM’s highly portable and easy to duplicate. Disaster recovery practice becomes far easier when you can easily make a duplicate of your production server.

This architecture’s utility was brought to light when one of your servers died. We were able to pull the disks containing our production servers, copy the VM’s to another server, then get those servers running again quickly. There was no need for OS reinstall or recovery from backup and because of this portability downtime was minimized.

I have VMWare server installed on my Windows workstation with a Centos 5 VM running in the background. I use it for some MySQL and PHP stuff so it isn’t used a whole lot but I hardly know it’s there. The beauty of this that the Windows guys can have a Linux VM and the Linux guys can have a Windows VM. That can help quite a bit when testing browser compatibility on a website or getting access to a tool not available for your OS of choice.

VMWare server has helped us utilize our server resources better at a very minimal cost. Running 4 servers for the price of one saves us time and money. What else could you ask for?

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