July 2014 - luv-main - example.com

SATA SSD + RAID
by hannah commodore 07 Aug '14

07 Aug '14

Hi all, I've inherited a system which has an Adaptec 2420SA RAID controller and 4x SSDs running in RAID6. There's no end to problems experienced with this setup; a disk seems to time out and get ejected from the controller at least every week. It's not always the same disk though, and I've tried replacing each of the SSDs with their spares, to no avail. Is there any known issue with using SSDs in hardware RAID that I've overlooked? Performance isn't *that* much of an issue, since it's only running Apache + mod_perl and a ~100GB MySQL database. Any thoughts appreciated Thanks, Hannah

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dns question.
by Daniel Jitnah 02 Aug '14

02 Aug '14

Hi All, when I do dig somedomain.org I get: ; <<>> DiG 9.8.4-rpz2+rl005.12-P1 <<>> somedomain.org ;; global options: +cmd ;; connection timed out; no servers could be reached What is the "no servers" that could not be reached?? If I do dig greenwareit.com.au it works fine. Both somedomain.org and greenwareit (and 3 other domains) are on the same dns server. somedomain.org is registered with namecheap.com. Any one has domain registered with them? (not my choice) Cheers Daniel.

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Re: dns question.
by Peter Ross 31 Jul '14

31 Jul '14

From: "Sean Crosby" <richardnixonshead(a)gmail.com> > Hi Peter, > > I think your problem is that glue records for your domain do not exist in > the zone file for the DNS servers for id.au Thanks. > I think you need to contact your domain registrar to add > ns.gonglenuts.id.au as a glue record in the id.au namespace, I assumed that would happen when I can specify NS server and IP address in the administrative interface of the domain registrar. In a second step I wanted to experiment with some DNSSEC and PGP key via DNS related stuff so I thought "control as much as possible by myself" would be good. http://tools.ietf.org/html/draft-wouters-dane-openpgp-02 Here a bit more background: https://www.newschallenge.org/challenge/2014/feedback-review/advancing-dane… I wanted to point at this but I cannot find anything of same content in English (this link is German): http://www.heise.de/netze/meldung/DANE-disruptiv-Authentifizierte-OpenPGP-S… > or you can > set your primary DNS server as something with an address outside the > gonglenuts.id.au domain. Yes, that's plan B. Ages ago I had these external addresses (an ISP) as primary sources but they were configured to act as a slave to a DNS server I was running. That way I avoided these constant: "Can you make a change in our domain" calls. I wonder who could do this. Also, DENIC in Germany asked for at least two nameservers in two different locations but that does not seem to be a requirement here? Thanks for help Peter

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Re: dns question.
by Peter Ross 31 Jul '14

31 Jul '14

Hi Daniel, did you figure out your problem? I made, just for fun, an experiment to get an own nameserver up and running (I did not run a _public_ one for ages). The nameserver is up and running, I see it in whois but it does not get propagated. Here in detail: http://www.whoismydomain.com.au/whois/gonglenuts.id.au Domain Name: gonglenuts.id.au Last Modified: 01-Jul-2014 02:03:45 UTC Registrar ID: WAR Registrar Name: Web Address Registration Status: inactive Registrant: Peter Ross Eligibility Type: Other .. Name Server: ns.gonglenuts.id.au Name Server IP: 115.186.196.107 On the nameserver itself runs a bind 9.10. The zone file: $TTL 3h @ IN SOA ns.gonglenuts.id.au. root.ns ( 2014073001 1d 12h 1w 3h ) ; Serial, Refresh, Retry, Expire, Neg. cache TTL @ IN NS ns.gongelnuts.id.au. ns IN A 115.186.196.107 You can wuery the server, it returns SOA, NS and A records.. but if you query "the Internet" it returns: $ nslookup > set type=SOA > gonglenuts.id.au Server: 192.168.50.223 Address: 192.168.50.223#53 ** server can't find gonglenuts.id.au: NXDOMAIN I do not know what I did wrong. While writing this, I noticed this whois line "Status: inactive" But I do not know why it is. The domain is registered, setup and paid. It was a bit low on my priority list over the last weeks (it is a "playground project") but I still would like to sort it out one day.. Regards Peter

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Re: dns question.
by Peter Ross 31 Jul '14

31 Jul '14

From: "Daniel Jitnah" <djitnah(a)greenwareit.com.au> >> Hi Daniel, >> >> did you figure out your problem? > > I cheated. The domain registrar in question provides its own dns > hosting server. I used it. But I did not want at first because it has > limitations like no mx record - but for now thats not an issue. > > In the past I did setup my own server, but have found it easier to use > xname.org. They are free but can be slow to propagate and update. Okay, I will have a look at this too. Thanks. > You seem to be using an internal IP (192.168...) > Is your router allowing DNS port through and redirecting to > 192.168.50.223? The not-working nslookup was using my internal company DNS server which is forwarding to a provider. That's not an issue. I get the same "not found" on any other DNS server. What I wanted to illustrate: The nameserver itself (ns.gonglenuts.id.au on 115.186.196.107) is up and running - but it does not get propagated. You can query it yourself: $ nslookup > server 115.186.196.107 Default server: 115.186.196.107 Address: 115.186.196.107#53 > ns.gonglenuts.id.au Server: 115.186.196.107 Address: 115.186.196.107#53 Name: ns.gonglenuts.id.au Address: 115.186.196.107 > How long has it been on for? could be it is still propagating. It can > take over 24 hrs sometimes. I set it up weeks ago. > Check: > > Did you create an A record for gonglenuts.id.au? Yes (see request above, and also in my zone file below). > This is my zonefile for greenwareIT on xname.org: > > $TTL 600 ; Default TTL > greenwareit.com.au. IN SOA ns0.xname.org. danyj028.gmail.com. ( > 2014073101 ; serial > 600 ; Refresh period > 600 ; Retry interval > 604800 ; Expire time > 10800 ; Negative caching TTL > ) > > $ORIGIN greenwareit.com.au. > IN NS ns2.xname.org. > IN NS ns1.xname.org. > IN NS ns0.xname.org. > IN MX 10 mx.greenwareit.com.au. > git999 IN A 60.241.200.146 > shop IN A 60.241.200.146 > greenwareit.com.au. IN A 111.67.23.208 > www IN A 111.67.23.208 > git09 IN A 111.67.23.208 > mx IN A 60.241.200.146 > www2 IN A 103.25.56.140 It is similar to mine, I think (of cause my is shorter) >> $TTL 3h >> @ IN SOA ns.gonglenuts.id.au. root.ns ( 2014073001 1d 12h 1w 3h ) >> ; Serial, Refresh, Retry, Expire, Neg. cache TTL >> >> @ IN NS ns.gongelnuts.id.au. >> >> ns IN A 115.186.196.107 Regards Peter

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LXC containers and autodev
by Toby Corkindale 30 Jul '14

30 Jul '14

Hi, With the current Ubuntu LTS as both host and guest for LXC I'm missing /dev/net/tun inside the LXCs. I found some people on the internet mumbling about creating /var/lib/lxc/$NAME/autodev as a shell script that does the appropriate mknod, but this doesn't seem to do anything for me. For the time being I've "fixed" it with a bodged openvpn init script inside the LXCs (that just adds the mknod call) but I wondered if anyone here knew what the proper way to fix this on LXCs is? Please note, this is a separate issue to needing to add the permission to the LXC config. I'm already doing that, and the dev node wouldn't work at all if I hadn't. (But works fine once I do) Cheers, Toby -- Turning and turning in the widening gyre The falcon cannot hear the falconer Things fall apart; the center cannot hold Mere anarchy is loosed upon the world

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Linux training
by Peter Drake 29 Jul '14

29 Jul '14

There is a whole lot of Linux training starting to happen in the main stream arena For example the Linux Foundation MOOC https://www.edx.org/course/linuxfoundationx/linuxfoundationx-lfs101x-introd… LPI has partnered with NDG and Cisco’s NetSpace Learning Management System and via Cisco Netacademy to provide Linux Fundementals. The Netacademy is the largest "classroom" in the world with 10,000 academies in 165 countries, all of whom have access. http://www.netacad.am/linux_fundamentals.html The Red Hat Academy has been offering training through schools and tertiary institutes for many year. Victoria University, Melbourne are a Red Hat Academy who can provide the RHCSA and RHCE vendor exams as part of their course. Cheers

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Interesting groupon
by Russell Coker 27 Jul '14

27 Jul '14

I'm not recommending that anyone buys this, but I think it's an indication of the increasing popularity of Linux. $99 for an Online Linux and UNIX Certification Bundle (Don't Pay $2,339) http://bit.ly/1l41bXE -- Sent from my Samsung Galaxy Note 2 with K-9 Mail.

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Re: SATA SSD + RAID
by hannah commodore 24 Jul '14

24 Jul '14

On 24 Jul 2014, at 18:32, James Harper <james(a)ejbdigital.com.au> wrote: > What brand/model are the SSD's? We just had two Samsung SSD's fail pretty much simultaneously (within the replacement window, so it took the machine down). Presumably it was wearout, although all post-mortem testing we did shows no problems with them and the limited SMART capability they possessed said everything was fine. They are Plextor M5 Pro drives. The controller doesn't even seem to pass SMART through, other than to query on it's own and give either "OK" or not

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Cheap Flash SATA drives
by Russell Coker 24 Jul '14

24 Jul '14

http://www.kogan.com/au/buy/kogan-256gb-6gbs-solid-state-drive/ Kogan is selling a 256G SATA flash storage device with Intel flash (IE flash that shouldn't lose your data) for $139. Flash storage will make your system a lot faster. Boot time will be improved a lot, particularly if you use systemd and have a multi-core CPU (in which case CPU won't be a bottleneck and most of the boot time will be disk IO). The time taken to login to a GUI environment will be a lot faster too, last time I timed it a flash device halved the time from entering a password in KDM to having KDE ready to use. Flash storage also makes your system a lot quieter, you might not realise the noise from a constantly spinning hard drive until it goes away. If you have $139 to spend on an upgrade to a desktop system then this is probably the best option. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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