Hostname on AWS CentOS 7 EC2

I was setting up a shiny new CentOS 7 EC2 instance, but when I tried to set the hostname using all of the typical Linux-y ways, none of them stuck after a reboot.  It just kept going back to the default EC2 naming convention of ‘ip-172.31.x.x’.  Since I am still getting used to CentOS 7 and all of the stuff they changed from 6, I figured it was a CentOS 7 thing.  Not so…

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Configuring TACACS+ on Juniper SRX and Windows Active Directory

I’m sure someone has already documented this somewhere, but here are my usual breadcrumbs.  After pouring through Juniper’s thorough, yet scattered, documentation I finally got my SRX talking to Windows Ad via TACACS+.

I decided to go with TACACS.net, a free (not as in beer, though) command line oriented service that runs on Windows. It’s a very nice program and really cool that it can be downloaded for free. They charge for support, so I guess that’s how they keep the lights on. Read more

Windows – Can’t delete local printer port

Another reason I hate dealing with MS. I have had this issue with every version of Windows as far back as I can remember so obviously they will never fix the code.  So, you want to reconfigure a non-working printer or remove an old entry in the printer server “Ports” tab.  But Windows won’t let you – it says that the “Resource is in use.”  Huh?  I deleted the printer, now I just want to delete the local/TCP port.  Turns out there might have been old jobs sticking around and they need to be cleared out first.  Uggh.

http://en.community.dell.com/support-forums/peripherals/w/printers/18.delete-print-jobs

This isn’t my solution, but I just want to give a shout out to the guy who posted it and hopefully one extra link will give him that much more Google ranking cred.

WordPress Auto Updates

There has been a lot already posited on this subject, but in my corner of the WP world I figured I’d throw in my $0.02.  As someone who has been involved with IT for some time now, I’m well versed on the double-edged blade that is auto-updates.  On one hand it offers a respite for weary, overworked tech folk, but on the other hand updates are no different from the rest of the software development process – bugs are inevitable and bad things can happen. Read more

Most Awesome CMS Ever – Part Deux

In a previous post, I wrote about a CMS called GPeasy.  That post actually seems to still get a lot of hits, which might lead the visitors to wonder why I raved about GPeasy when I am using WP as my CMS/blog platform.  Good question.  At the time I decided to go with a CMS, WP was starting to get really good at being both a CMS and blogging platform and GPeasy was still being baked.  But I might have to revisit GPeasy as it looks like they’ve added some cool features.Of course, I also stumbled upon Octopress the other day, which seems to be an interesting blog platform geared towards hackers with a lot of ways to show code, etc.  I might have to check that out as well.  Options abound!

Allowing non-root users access to libvirt and virsh using polkit

I’ve been using virt-manager to manage my KVM hosts and I’m not keen on having to login to the remote hosts as root, plus I would get the password prompt every time I connect to the server (sure I could setup my pulic SSH key on the root account, but not a good idea to use RSA auth to the root account on a remote server).  With Debian (Wheezy) it was fairly simple in that all that I had to do was add my regular username to the group “libvirt”.  Then I could use the URI: qemu+ssh://virtadmin@my.kvmhost.com/system to connect to the remote KVM host using virt-manager.

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Resizing my LVM based virtual disk

So I needed to upgrade my mail server but realized I only had 5GB of space left on the /opt partition and the upgrade complained about needing more than 5GB.  Not sure why I didn’t size the whole virtual disk a little bigger in the first place.  Also not sure why I didn’t set Zabbix to warn me when the disk space got that low.  Hindsight and all of that.  So following other’s recipes this is how I resized my LVM based virtual disk, and then subsequently resized the partitions within the VM.

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Virtualization – Still Rollin’

Almost There

Virtualization has been near and ear to my heart ever since I started using VMware workstation in the late ’90s.  I’m sure the ol’ mainframe guys are thinking “pffft, boy, I’ve been virtualizing my *nix and VMS/VAX instances while you were plinking away on your Apple IIe in middle school.”  Which is one reason I keep this Dilbert comic on my board at work:
Computer Holy Wars (UNIX)

 

 

 

 

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