734 reputation
820
bio website bitdepth.thomasrutter.com
location Australia
age 34
visits member for 5 years, 5 months
seen yesterday

Web application developer by day who has also dabbled in audio, video and image tools.


Jun
20
comment Do you use postfix or qmail and why
I thought that the "weird licensing" was rectified in 2007 when it was donated to public domain. I think the lack of updates is more of a problem than the licensing these days in terms of acceptance by distros.
Apr
22
comment BIND - why duplicate nameserver entries (@ and *)?
Well, assuming this is mainly about wanting to use subdomains per service, like "www" for websites, that's an opinion that the rest of the world is increasingly moving away from, including for example this website (serverfault.com). Relevant discussion also here and here.
Apr
22
comment BIND - why duplicate nameserver entries (@ and *)?
Redirects? You mean a CNAME? That's not possible for a domain that has any other records and not a good idea otherwise. Or do you mean an HTTP redirect? Those are nothing to do with DNS, bind, or zone files.
Apr
5
comment Is NTFS 16 TB volume size limit “real”?
@Massimo that's what people said about 20GB drives once. And they would have said it about 500MB drives once, too. But I am from the future, and I have two 3TB drives, and yes it's impractical to copy 3TB of data but how else are you gonna store 3TB of data?
Apr
5
comment Is NTFS 16 TB volume size limit “real”?
@jrtipton NTFS itself is designed to support volumes as big as 2^64 - 1 clusters of up to 64kB each. That is, 1,099,511,627,776 TB (over one trillion Terabytes!). However, the NTFS support in Windows (since Windows XP) only supports 2^32 - 1 clusters of up to 64kB each. That is, 256 TB.
Feb
20
comment Updating production Ubuntu boxes the dos and don'ts
The debian/ubuntu utility checkrestart is very useful in determining which processes have been updated but still need to be stopped and restarted in order to get the new code.
Feb
15
comment Storing a million images in the filesystem
Because it's not a universally bad solution. Sure, for most people I wouldn't recommend it, but there is a small subset of applications for which the benefits (yes there are some benefits) are actually quite important, like acid compliance, or replication, or as someone else mentioned having versioning. Though admittedly, this particular answer really didn't sell it very well and seemed to be recommending it for a the wrong reasons.
Jan
31
comment Can Ubuntu Desktop “become” Ubuntu Server?
No even at 10.04 this wasn't correct - it has always been easy to change kernels.
Dec
13
comment BIND - why duplicate nameserver entries (@ and *)?
This doesn't really answer the question though...
Dec
10
comment Can Ubuntu Desktop “become” Ubuntu Server?
Note to anyone visiting this page: this answer is wrong. Firstly, it's easy to change kernels. Secondly, there are no longer separate kernels for server: linux-image-server is now just an alias for the generic kernel.
Dec
7
comment How to minimise SpamAssassin (spamd) memory use
From my observation and using the tool smem, it looks like spamassassin uses around 50 MB of RAM, and that if you fork it into multiple processes, almost all their memory is shared memory, so it'll still use around 50 MB of RAM total amongst all processes, even though ps reports each one having a RSS of 50 MB. YMMV.
Dec
4
comment Recommended DNS SOA record TTL default?
To clarify, the SOA Minimum TTL field stores the TTL value to be used to cache a negative request - a request made to the zone for some resource which doesn't exist. Their explanation is sort of true but fails to clarify it's only for negative responses. Secondly, the SOA Refresh is never used by normal DNS queries, it's only used in situations where you have secondary (slave) nameservers updating themselves from your primary (master) nameserver. So their explanation of that field is definitely untrue.
Nov
30
comment Why should one have a secondary DNS server?
I've read quite a few comments that indicate that many real-world DNS caching services (like those used by ISP) don't re-try using a second name server, they just fail if the first server doesn't respond. For example, this answer on serverfault. In which case, if you have two separate nameservers you need to make sure both are up, because either one being down can lead to downtime for the hosted domains. This does go against common practice and the RFCs, but seems concerning.
Nov
28
comment Should I use .htaccess in an Apache production/live environment?
Whether it is in the source code and whether the impact is significant enough to be measurable are different. As we're talking about read-only access, this should be entirely satisfiable from the system cache once it's read in the first time, shouldn't it? If so that would eliminate physical disk access. The rest is in-memory and not very strenuous.
Nov
23
comment How can I list all installed packages from lenny-backports?
So in other words, ~S is like an operator which means "the next two conditions have to apply to the exact same package and version".
Nov
12
comment I just got a linode VPS a week ago and I've been flagged for SSH scanning
Read log files such as /var/log/auth.log to see who logged in or attempted to log in and which user they logged in as. Other log files such as /var/log/syslog will show more comprehensive, general information that can also give clues. Remember the attacker may have had access to modify or delete these logs. Also, this should not be a substitute for reinstalling the OS.
Jan
19
comment How can I filter spam from yahoo's servers?
I run through Spamhaus Zen's DNSBL and PSBL - question updated with info. I have considered using spamassassin with a very high threshold but not sure how effective it'll be on this type of spam.
Dec
15
comment Does orientation affect hard drive lifespan?
"If their heads were heavy, and sagging was a problem I'd say that horizontal position would be better" But by a similar argument, the distance between the head and the surface is extremely crucial, and you wouldn't want the same sag to affect that clearance (though I understand there is a "bubble" of air between them).
Dec
15
comment Does orientation affect hard drive lifespan?
It is an excellent point, though the hard drives in iPods are quite different to the hard drives used in desktops/servers. I know, for example, that smaller hard drives can take a LOT more shock and vibration than larger ones. 2.5" drives can take about 10 times as much as 3.5" drives. It's logical that other characteristics would vary with drive size/type as well.
Oct
20
comment SSL certificate selection based on host-header: is it possible?
How do you cope with Windows XP users, Android users, Blackberry users, etc?