Comments for AdmiNirvana

Comment on Superfluous subshelling by MrKane

MrKane — Tue, 16 Feb 2010 10:53:34 +0000

Hello, nice linux related posts going on here

I’ve always put inverted commas around the list part and the variable, like so:

#!/bin/bash

for I in “$( ls -rt *.sh )”
do
echo “$I”
done

[user@server ~]$ for I in “$( ls -rt *.txt )” ; do echo “$I”; done
fileone.txt
filetwo.txt
file three.txt

I wasn’t aware of the file globbing properties of “for”; thanks for that

Take ‘er easy,

MrKane

ps. I distrust backquotes, and so use “$()” instead

Comment on Building the EtherSAN: Part 2 by rob

rob — Wed, 03 Feb 2010 23:45:43 +0000

Have you looked at Coraid? Raw ATA mapped onto Ethernet for about $500/TB.

Comment on Stop wrecking our republic by Fred

Fred — Thu, 21 Jan 2010 14:41:50 +0000

I totally agree with you on this sad state of affairs, especially back in the middle of 2007. After a year of total one party rule, we’re surely in the advance stages of level 9 (9. From Moral Decay to Dependence) and quickly headed into bondage. I prefer not to follow the Romans into history. Hopefully November 2, 2010 will be not just a backlash of liberal socialistic foolishness, but a taking back of our country. It doesn’t have to all come QUICKLY (some historic president’s favorite way), it just has to start and continue for a very long time.

Comment on Disks, lots of disks by Brian

Brian — Thu, 07 Jan 2010 18:17:34 +0000

We are, and it has been rock solid. We’ve only had one event which resulted in downtime, and it was due to disk failure (3 at once!) than a failure of the unit itself. In fact, it handled it gracefully–instead of letting the data degrade, the unit just stopped all I/O. Pretty clever.

The only thing I would do different would have been to make sure we had plenty of hotspares in a pool waiting to go. We originally had it set up with one large RAID-6 array, and by some outrageously rare occurrence, we lost the 3 disks within 3 days before we could get replacements on site.

How are you planning running GFS without shared storage (i.e. using internal)? Both servers will need concurrent bus access to the same disks.

Using the “EtherSan” (as I call it), is a great way to go. Majorly expandable bandwidth for low low cost. Run with it!

Comment on Disks, lots of disks by Clay Stuckey

Clay Stuckey — Wed, 06 Jan 2010 18:01:17 +0000

Looks like a slick little set up you have there. Are you still running that? Do you have any “lessons learned” from it? What would you do differently if you were to redo it today? I was looking at going with 2 discreet servers for GFS and internal storage in lieu of the san and 2 GFS heads. I think I can do about 28TB raid 6 with hot spares, 10GB connectivity and 800MB/s I/O to the network for about $14k. That would give me a bit more redundancy.

Comment on Firewalling brute force attempts with IPTables by Jerry Lumpkins

Jerry Lumpkins — Tue, 03 Nov 2009 15:13:40 +0000

Thanks so much for the insight into how to deal with repeated attempts to gain access to a server. I get my report every morning via email, and diligently go through, and add a new firewall rule blocking access to the class C surrounding any IP that tries to gain access, then, I look up the owner of the network, and send them an email with details from my logs. I get a reply occasionally from one of the ISPs, but most of the time, they just don’t seem to care.

It would be nice to have some central, world-wide authority that we could notify so that there was at least a composite list of all intrusion attempts. It seems that that could be published, and make it possible for all servers to get updated blocking bad guys.

In the meantime, I’m going to follow your example, and add the rules you’ve mentioned.

Thanks again,

Jerry Lumpkins
(My website is just personal pictures, and experiments in how to do things. No sensitive data, but, I hate it when somebody tries to break in…)

Comment on iPhone bug by George Trujillo

George Trujillo — Tue, 20 Oct 2009 03:51:18 +0000

Brian,

This post solved this issue for a number of people on my team (today).

Comment on iPhone bug by Brian

Brian — Mon, 19 Oct 2009 19:18:01 +0000

I’m sure the bug is long gone. That post was re iPhone 1.0, back in 2007.

Comment on iPhone bug by Alex Gorbachev

Alex Gorbachev — Mon, 19 Oct 2009 19:15:32 +0000

I didn’t have any issues with mine. Eh? My SMTP requires authentication and SSL.

Comment on iPhone bug by George Trujillo

George Trujillo — Mon, 19 Oct 2009 16:33:25 +0000

Thanks for the post. This error has been driving me and other team members crazy. What a concept we can now send email with our iphones again.

Big thanks!!!!!!!!!