Hint: OSAD is used to push updates or commands to the client from the satellite. The clients subscribe to a jabber channel and do what the satellite tells them to. Chances are the old hostname is still in the jabber configuration file... happened to me during the Sat5 upgrade. Thanks. I get the purpose of OSAD, but all I see is errors in the client and server OSAD logs that are completely useless, even with debugging set to high values. I'm pretty sure it's an SSL cert error.
I'm currently working towards on RHCA, which requires a series of 5 exams, one of which covers "systems management." In the Red Hat world, this means RHN Satellite, Xen, and a few other misc tricks of the trade (packaging RPMs, RHN proxy, etc). The rub is that I'm trying to do this without taking the courses associated with each exam. This is a huge challenge since there is very little official material to study from. I'm currently signed up for EX401, the systems management text, next week.
I obtained an evaluation satellite license (they quoted around $13k/year as a retail cost) and a bunch of management, provisioning, and virtualization entitlements. I only have the course outline and the exam "prep guide", which is really just 20 or so bullets on what you need to know. I've done all my studying using Red Hat's Satellite documentation and the varoius Xen materials that are publicly available.
Satellite is a really useful technology for large enterprises with a bunch of Red Hat/CentOS/Fedora servers. It's exactly like the rhn.redhat.com interface. You can create kickstart profiles, provision new systems, manage Xen guests, run system commands, deploy configuration files (centralized syslog.conf, anyone? common/etc/motd? hosts.allow/.deny? very useful.), run commands on a lot of hosts at once, and carefully control patches.
I've got some beef with it. First, it's currently supported only on RHEL 4, not 5. RHEL5 has been out for about 15 months - what gives? Getting it set up and configured correctly has been very finicky. I still don't understand all the behind-the-scenes services. The jabber service that runs OSAD is a huge mystery to me. And God save you if you try to change your hostname - getting that SSL cert to match again has been a nightmare.
Some of this is certainly my own lack of knowledge. There's a useful, active mailing list that I see the developers participate in. I'm sure support is excellent as well. I've been mostly impressed with the documentation, but I don't need to see screenshots of every piece of the web interface. Tell me WTF that jabber process does! How can I get OSAD working properly? Plus, the docs can be pretty spread out and tough to find. I wasn't even aware of the mailing list until I read the README that's buried in the Satellite ISO.
All-in-all, a cool product, but perhaps not useful for organizations with 50 servers or so.
Re:Another near-useless book review.
on
Running Xen
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· Score: 1
I don't know why I keeping [sic] reading/. comments. I never feel like I get much information for my 30 seconds. What is this uber-useful xen mailing list? There's too much whining about how people "feel" about the article but no meat.
It seems to me that using search terms as a basis for anything is inherently biased towards technically savvy citizens. We Slashdotters are far in the minority - most of the population still gets most of it's news from CNN and the morning paper. Especially the voting majority.
As an example, look at the Google Trends data with Ron Paul included. Searches for Ron Paul were higher than for Obama in early January, yet he was never higher than 4th (3rd?) in the Republican caucuses/primaries. His popularity was on the Internet alone.
I think you're getting at the core of the problem here. Broken feedback is just the tip of the iceberg of eBay's massively mismanaged, broken auction system. To touch on just a few of the problems of this monopoly:
Auction sniping. As a regular 'ol bidder who doesn't install fancy sniping software, I hate that I can watch an item for 3 days, bidding reasonable amounts, then get outbid in the last 30 seconds. This has been a problem for years. Sitcoms have made fun of it. Why isn't this fixed?
Scam artists. I can do a simple search for just about any electronic gadget and find scams galore. If I can see that they're scams, why can't eBay figure it out?
Lack of customer service. Have you ever tried to ask eBay something and gotten anything back other than a form letter? Any "real world" company that did business this way would be out of business in a matter of months. I can't figure out how eBay has gotten away with this for so long. (This is a huge problem for Paypal too).
Few independent sellers. As far as I'm concerned, eBay is really just a giant mall now. It's rare to find an average person selling a used or unneeded item. It's much more common to find typical retail-style vendors who buy wholesale from the manufacturers. eBay stores are the last nail in this coffin.
Personally I've been boycotting eBay for quite some time. Craigslist fulfills my eBay needs quite well. I was worried when ebay bought out 25% of Craigslist, but so far it seems to have had little or no effect.
I applied for a sys admin position in a Google data center in 2004 and was accepted but turned down the job. Their data center admins are contractors without benefits. At the time, the data centers were in Mt. View, Atlanta, and D.C, and the position I was offered was for either of the latter 2. Although working for Google sounds fun and interesting, would you want to work as a contractor in a data center in either of those places? Pay was decent but I'm certainly making more now working at a small company in a MUCH better location.
Bottom line? Despite Google's reputation and the fact that their stock is insane, my quality of life comes first.
All great points. One additional point, reflected from current experience:
Respect people's time. Understand that people have other priorities and that they can't be spending all their time working on yours. Obviously this varies with each project.
Running multiple guest OS's as a service is key; however, GSX costs a ton.. what I've done instead is use virtual PC as a scheduled task. You can schedule it to start as system boot. It then essentially runs in the background. The major downside to this is that you can't stop and start it like a service, and you can't bring it to the foreground without ending the process and restarting it.
This is probably possible with vmware too, though I haven't tried it...
I have used both of these extensively. I have had more problems with VMWare than with Virtual PC, but both have issues. Both have stability problems, and vmware is full of inconsistencies; what works in one version may or may not work in another. For example, RedHat EL WS v3 will install only in text mode in VMWare 4.5.2, but 4.5.1 will install only in graphical mode. SuSe 9.1 Pro simply won't install, at least when I first tried it 2 or 3 months ago, right when SuSe 9.1 pro came out. VMWare customer support is TERRIBLE; there is supposed to be 30 days support included. I emailed them several times and never got a response at all. The community forums are semi-useful, though it has far more questions than answers.
I would love to see a new competitor in this market.
Anyone remotely interested in science should check out A Short History of Nearly Everything by Bill Bryson. What a great book to learn about all aspects of science. Well-written, informative, and interesting all at once.
First, why would you attempt to remove 'core*' ?? The name of the file is 'core'. Why would you add a wildcard to it? You also don't need the '-r'...
Core files can have dates tagged on to the ends to help keep track of different cores. Furthermore, My program consisted of several directories, with executables in each, thus the possibility for the existence of core files in each.
Second, you can't get shocked by PCI bus voltages.
Where did I was say that the PCI bus shocked me? I said I was replacing a PCI card (or something else, I don't remember for sure) and got shocked.
Your lesson: Don't take things so literally, you end up looking like a nitpicking jack ass.
I had a similar problem once. Up until about 2am finishing a TCP/IP simulator program in C for my networking class. Had the project basically finished, was just cleaning up, and did "rm -rf core *" instead of "rm -rf core*" (note the space!). I was using a box with ext3 instead of ext2 - doh! Can't just unmount the filesystem and go find your file with ext3. I had to vi the entire filesystem (~12GB) and patch together pieces of the file. The program never did work right again and I ended up with a B on the assignment (only B ever in that class:(). Needless to say, I learned my lesson and now use Snapshots.
In a somewhat unrelated (and more painful) story, using my vast intellect I once attempted to replace a PCI card (of some sort) in a running computer and shocked the shit out of myself. Twice . In less than ten minutes. Apparently I didn't learn that lesson.
I have the Samsung Syncmaster 213t and it is the greatest monitor in the world. I got it for ~$1100 after a $100 rebate. You can find them on ebay for ~$1000 as well. It has DVI/VGA inputs and you can easily switch between them using the Exit/Source button on the front. I use that feature to switch between my XP machine and my Debian box. The display is beautiful - 21.3" of LCD goodness. Gaming is good. Some ghosting is noticeable, especially in high-paced games like unreal tournament. It's not terrible. I would highly recommend this monitor over a 17". You have to see it at 1600x1200 to believe it.
The general rule of thumb seems to be - If you don't cause trouble for anyone else, Comcast won't cause trouble for you.
That's what I've noticed as well. I've been running ssh and http for nearly 3 years now with no problems. I set my debian box to a static IP for a while and they didn't like that but I haven't heard from them about the open services at all. The only reason I mentioned it was this section from the Comcast Acceptable Use Policy:
(xiv) run programs, equipment, or servers from the Premises that provide network content or any other services to anyone outside of your Premises LAN (Local Area Network), also commonly referred to as public services or servers. Examples of prohibited services and servers include, but are not limited to, e-mail, Web hosting, file sharing, and proxy services and servers;
They don't seem to be proactive in enforcing that section but they do have it there to cover themselves if necessary..
I don't think will be very useful/valuable until clients (such as ssh) have it built in. I don't feel like going through the hassle each time I want to connect. Though it would keep comcast from discovering my ssh service...
Or, better yet, how about having an operator direct the calls. If the company can clearly see that their voice menu system is so complicated that it angers the customers, they need to change what they're doing! How refreshing would it be to call any large company (and I mean any) and have a real, live person answer the phone for once. I know it would catch me off guard.
How about a keyboard shortcut to reach the address bar? Anyone know one? In Mozilla and IE (and most other browsers) it's Alt+D (on Windows boxen anyway). I REALLY miss this feature. Any idea?
With my Microsoft Intellimouse, I have it setup to do a "Command-Click" when I click with the middle mouse button. You can do this through the Microsoft Mouse icon in System Preferences. This lets me middle-click to open a tab.
Slashdot Mirror
I'm currently working towards on RHCA, which requires a series of 5 exams, one of which covers "systems management." In the Red Hat world, this means RHN Satellite, Xen, and a few other misc tricks of the trade (packaging RPMs, RHN proxy, etc). The rub is that I'm trying to do this without taking the courses associated with each exam. This is a huge challenge since there is very little official material to study from. I'm currently signed up for EX401, the systems management text, next week.
I obtained an evaluation satellite license (they quoted around $13k/year as a retail cost) and a bunch of management, provisioning, and virtualization entitlements. I only have the course outline and the exam "prep guide", which is really just 20 or so bullets on what you need to know. I've done all my studying using Red Hat's Satellite documentation and the varoius Xen materials that are publicly available.
Satellite is a really useful technology for large enterprises with a bunch of Red Hat/CentOS/Fedora servers. It's exactly like the rhn.redhat.com interface. You can create kickstart profiles, provision new systems, manage Xen guests, run system commands, deploy configuration files (centralized syslog.conf, anyone? common /etc/motd? hosts.allow/.deny? very useful.), run commands on a lot of hosts at once, and carefully control patches.
I've got some beef with it. First, it's currently supported only on RHEL 4, not 5. RHEL5 has been out for about 15 months - what gives? Getting it set up and configured correctly has been very finicky. I still don't understand all the behind-the-scenes services. The jabber service that runs OSAD is a huge mystery to me. And God save you if you try to change your hostname - getting that SSL cert to match again has been a nightmare.
Some of this is certainly my own lack of knowledge. There's a useful, active mailing list that I see the developers participate in. I'm sure support is excellent as well. I've been mostly impressed with the documentation, but I don't need to see screenshots of every piece of the web interface. Tell me WTF that jabber process does! How can I get OSAD working properly? Plus, the docs can be pretty spread out and tough to find. I wasn't even aware of the mailing list until I read the README that's buried in the Satellite ISO.
All-in-all, a cool product, but perhaps not useful for organizations with 50 servers or so.
I don't know why I keeping [sic] reading /. comments. I never feel like I get much information for my 30 seconds. What is this uber-useful xen mailing list? There's too much whining about how people "feel" about the article but no meat.
It seems to me that using search terms as a basis for anything is inherently biased towards technically savvy citizens. We Slashdotters are far in the minority - most of the population still gets most of it's news from CNN and the morning paper. Especially the voting majority.
As an example, look at the Google Trends data with Ron Paul included. Searches for Ron Paul were higher than for Obama in early January, yet he was never higher than 4th (3rd?) in the Republican caucuses/primaries. His popularity was on the Internet alone.
Bruce Schneier discusses this with KipHawley, the head of the TSA and comes to many of the same conclusions.
Personally I've been boycotting eBay for quite some time. Craigslist fulfills my eBay needs quite well. I was worried when ebay bought out 25% of Craigslist, but so far it seems to have had little or no effect.
Yes. Preferably someone who can write. ;)
I applied for a sys admin position in a Google data center in 2004 and was accepted but turned down the job. Their data center admins are contractors without benefits. At the time, the data centers were in Mt. View, Atlanta, and D.C, and the position I was offered was for either of the latter 2. Although working for Google sounds fun and interesting, would you want to work as a contractor in a data center in either of those places? Pay was decent but I'm certainly making more now working at a small company in a MUCH better location.
Bottom line? Despite Google's reputation and the fact that their stock is insane, my quality of life comes first.
- B
Ha, nope. I do the same thing. 1000MB of storage, 0 KB used.
Running multiple guest OS's as a service is key; however, GSX costs a ton.. what I've done instead is use virtual PC as a scheduled task. You can schedule it to start as system boot. It then essentially runs in the background. The major downside to this is that you can't stop and start it like a service, and you can't bring it to the foreground without ending the process and restarting it.
This is probably possible with vmware too, though I haven't tried it...
I have used both of these extensively. I have had more problems with VMWare than with Virtual PC, but both have issues. Both have stability problems, and vmware is full of inconsistencies; what works in one version may or may not work in another. For example, RedHat EL WS v3 will install only in text mode in VMWare 4.5.2, but 4.5.1 will install only in graphical mode. SuSe 9.1 Pro simply won't install, at least when I first tried it 2 or 3 months ago, right when SuSe 9.1 pro came out. VMWare customer support is TERRIBLE; there is supposed to be 30 days support included. I emailed them several times and never got a response at all. The community forums are semi-useful, though it has far more questions than answers.
I would love to see a new competitor in this market.
Also, my favorite: Smoothwheel.
Anyone remotely interested in science should check out A Short History of Nearly Everything by Bill Bryson. What a great book to learn about all aspects of science. Well-written, informative, and interesting all at once.
- Ben
Ok troll, I'll bite...
First, why would you attempt to remove 'core*' ?? The name of the file is 'core'. Why would you add a wildcard to it? You also don't need the '-r'...
Core files can have dates tagged on to the ends to help keep track of different cores. Furthermore, My program consisted of several directories, with executables in each, thus the possibility for the existence of core files in each.
Second, you can't get shocked by PCI bus voltages.
Where did I was say that the PCI bus shocked me? I said I was replacing a PCI card (or something else, I don't remember for sure) and got shocked.
Your lesson: Don't take things so literally, you end up looking like a nitpicking jack ass.
I had a similar problem once. Up until about 2am finishing a TCP/IP simulator program in C for my networking class. Had the project basically finished, was just cleaning up, and did "rm -rf core *" instead of "rm -rf core*" (note the space!). I was using a box with ext3 instead of ext2 - doh! Can't just unmount the filesystem and go find your file with ext3. I had to vi the entire filesystem (~12GB) and patch together pieces of the file. The program never did work right again and I ended up with a B on the assignment (only B ever in that class :(). Needless to say, I learned my lesson and now use Snapshots.
In a somewhat unrelated (and more painful) story, using my vast intellect I once attempted to replace a PCI card (of some sort) in a running computer and shocked the shit out of myself. Twice . In less than ten minutes. Apparently I didn't learn that lesson.
- Ben
I have the Samsung Syncmaster 213t and it is the greatest monitor in the world. I got it for ~$1100 after a $100 rebate. You can find them on ebay for ~$1000 as well. It has DVI/VGA inputs and you can easily switch between them using the Exit/Source button on the front. I use that feature to switch between my XP machine and my Debian box. The display is beautiful - 21.3" of LCD goodness. Gaming is good. Some ghosting is noticeable, especially in high-paced games like unreal tournament. It's not terrible. I would highly recommend this monitor over a 17". You have to see it at 1600x1200 to believe it.
- Ben
The general rule of thumb seems to be - If you don't cause trouble for anyone else, Comcast won't cause trouble for you.
That's what I've noticed as well. I've been running ssh and http for nearly 3 years now with no problems. I set my debian box to a static IP for a while and they didn't like that but I haven't heard from them about the open services at all. The only reason I mentioned it was this section from the Comcast Acceptable Use Policy:
(xiv) run programs, equipment, or servers from the Premises that provide network content or any other services to anyone outside of your Premises LAN (Local Area Network), also commonly referred to as public services or servers. Examples of prohibited services and servers include, but are not limited to, e-mail, Web hosting, file sharing, and proxy services and servers;
They don't seem to be proactive in enforcing that section but they do have it there to cover themselves if necessary..
Lots of info available via a google search...
A few implementations here.
I don't think will be very useful/valuable until clients (such as ssh) have it built in. I don't feel like going through the hassle each time I want to connect. Though it would keep comcast from discovering my ssh service...
Here are two similar, less expensive ones (I used tinyurl.com, it links to ebay).
- Ethereal
- hping
- tcpdump
- tcpflow
Ahh, the staples of my diet. What my roommates don't know won't hurt 'emOr, better yet, how about having an operator direct the calls. If the company can clearly see that their voice menu system is so complicated that it angers the customers, they need to change what they're doing! How refreshing would it be to call any large company (and I mean any) and have a real, live person answer the phone for once. I know it would catch me off guard.
Damn, I just found it. Command-L. Schweet.
How about a keyboard shortcut to reach the address bar? Anyone know one? In Mozilla and IE (and most other browsers) it's Alt+D (on Windows boxen anyway). I REALLY miss this feature. Any idea?
With my Microsoft Intellimouse, I have it setup to do a "Command-Click" when I click with the middle mouse button. You can do this through the Microsoft Mouse icon in System Preferences. This lets me middle-click to open a tab.