Yikes, what an evening….. it started innocently enough in the afternoon. I have an old Mandrake 10.0 server that I was upgrading clamav on (recent security update). While I was at it, I was reviewing the anti-spam setup to see if I could get any better success with filtering junk mail. spamassassin has had an update since I updated this one last and also it seemed that dcc was installed, but not in active use *(no indications that it’s being used at all.) So, I set about trying to fix that and install the latest spamassassin. Somehere along the way something BAD happened. In retrospect, I’m not entirely sure how, but at one point I was root having just installed the rpms for spamassassin and then exited to my user account. Promptly on switching back to my user account I got a “permission denied” error. Eh? Ok, well let’s su again and see what’s up…. “permission denied” uh oh…. ls “permission denied” most everything actually….. permission denied.
Category: Tech Support
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VMware server usb devices not listed on Mandriva host
I’ve been using vmware server quite a bit of course, I’ve mentioned it before. I had never played around with accessing a usb device in the guest environment though. When I tried (host operating system is Mandriva 2006)…. nothing was listed, in spite of several devices being plugged in (and unmounted from the host.) So, I looked around and found that according to this…. that vmware feature requires USBFS to be mounted on /proc/bus/usb …. Some systems that don’t do this by default are…. Ubuntu Linux 6.06, SUSE Linux 10.1, SUSE Enterprise Linux Server 10, Mandriva Linux 2006, SLES9 SP3 64 bit……………. so how do you fix it?
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CLI Magic with curl
I saw this great article from enterprise.linux.com giving some good ideas on some of the interesting things that can be done with curl. (Curl is a command line application for accessing URL’s (web/ftp/etc.))
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Using DNS servers other than your ISP’s
As I mentioned earlier, Bellsouth seemed to be in the midst of a big DNS meltdown when I got up this morning. I spent some time getting various bellsouth customers “worked around” the issue by setting up an alternate DNS server for them. For starters…. DNS translates addresses like google.com into numbers (like 72.14.207.99) Think of it as a telephone directory lookup service… you can’t pickup a phone and punch in the letters of someones name to call them, you have to dial a number and first you have to see what the number is…. in networking, the computer does the DNS lookup for you when you type google.com in your browser bar. (Or when the browser tries to load it’s home page for instance.)
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Major Bellsouth DNS issues
This morning, I’m noticing some of the machines I monitor having big DNS problems. It seems to be Bellsouth.net’s dns servers gone sideways – none seem to respond. On one network in particular we’re having trouble getting a secondary (outside network) dns server to respond. From outside the bellsouth network things seem fine though. As usual dslreports is a good place to check if others are having the same issue. It appears as though this issue is affecting ALL of bellsouth’s network and has been since at the latest 11:30PM last night (the 16th of October.)
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Microsoft October 2006 patch Tuesday
The first thing I should mention is that this months update from Microsoft is the last for XP SP1 users should plan a migration path to SP2 to keep getting updates to XP. Multiple vulnerabilities this month have been patched in Office There are 4 advisories, but a total of 15 issues covered by those four. Powerpoint, Excel, Word and Office/Publisher there are a variety of exploits, some public (like the powerpoint) others that were privately reported. Also, Incidents.org gives a nice summary of the advisories and the severity of each (urgency of updating.) The setslice vulnerability is patched in this batch by the way.
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fdisk Unable to read /dev/sda
The other day I was trying to partition a drive hooked up via usb. (So it get’s /dev/sda as it’s device in linux)… I tried a few utilities to access the partition table and all failed, finally, I resorted to fdisk /dev/sda and was told “unable to read /dev/sda” which I thought was peculiar. The drive had come back in a “warranty replacement” swap for another drive and should have been wiped clean and should have been good as well.
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Software raid under linux (Ubuntu 6.06 Dapper Drake)
First, I should disclaim that this is going to be a brain dump of the resources and experience of a quick setup of Ubuntu 6.06 on a software raid based storage system. This may be less than ideal, but is doable and seems relatively solid as a system. First off, what is RAID (redundant array of independant/(*inexpensive) disks) So, several cheap hard drives put together in an “interesting” way. Now, increasing storage size isn’t something I’m too interested in, after all there are myriad other ways of expanding storage in a linux system (not to mention huge drives getting cheaper by the day.) My goal here is redundancy, I want to be able to lose a drive and still have the data, so RAID1 is what I’m setting up. We won’t get sidetracked into the other types.
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Flashing bios pain in the neck….
One of the “project machines” I’ve had that’s been retired from other service was to become a “storage server” this week. The twin 250GB drives had arrived and I was ready to setup a RAID1 array (mirroring essentially…) in software and use Ubuntu 6.06 as the base operating system. I had already wiped the other drive and removed the drive, plugged in the new ones (master on the primary and secondary channels) and…. BIOS only reads 136GB. Shoot…. it was a relatively recent system (maybe 3 years…) SO…. BIOS update was my best bet I thought.
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Vmware launches beta of real to virtual converter
Vmware has launched a tool (windows only it seems) aimed to convert a REAL running system into a virtual machine. (For use with VMWare’s virtualization products. The converter also can convert images from competing virtual machine “platforms”(?) (Microsoft Virtual PC, Microsoft Virtual Server, Symantec Backup Exec System Recovery (formerly LiveState Recovery) and Norton Ghost9 (or higher) to VMware virtual machine disk format.)