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RE: [CentOS] What's up with the mailing list spam?
by James D. Parra 04 Jan '08

04 Jan '08

>Please, no more GOD stuff..... > illicit mails, that include SPAM :-) > > So Admins GOD WORK! > > /Mats > > I believe he meant to type 'GOOD WORK'. No big deal. ~James

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xen dependencies
by Joseph L. Casale 04 Jan '08

04 Jan '08

It appears that if I perform an install of CentOS 5.1 without changing *anything* in the options, then do a #yum groupinstall 'Virtualization' I can now get Xen to function in bridged mode (it has network connectivity). In lieu of this, can anyone shed some light on what dependency Xen has that is not installed when you do a completely bare install and execute a #yum install xen? I am hoping to finally end up with a minimum install of CentOS with Xen functioning without a gui or any additional services that won't be needed. Thanks! jlc

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John Rosatti, Excavators, 3D, NASA and Why Should I care?
by Super Star 04 Jan '08

04 Jan '08

John Rosatti, Excavators, 3D, NASA and Why Should I care? Well, because! There are two definitions for excavator; one is any person engaging in excavation is called an excavator. The second definition of excavator is, of course, the vehicles called excavators, which are sometimes called diggers, trackhoes, fronthoes, and 360-degree excavators or just 360. This is not to be confused with Microsoft's vertical technology and news search engine called Excavator or xcavator, as one has nothing to do with the other. Here we're talking about heavy duty digging machines, even though several manufacturers like John Deere, offer Compact, Midsize, and Large Excavators ranging from 0-6 metric tons for the compact excavators, 6 to 40 metric tons for the midsize, and 40 to 85 for large John Deere excavators. Additionally there exist mini-excavators, made by another manufacturer, that will fit through a door. In case you're now wondering what 3D and VRML, or actually x3D has to do with excavators, that is something we will be getting to in other articles, for right now you'll just have to trust that there is a fit. For now, however, let's get back to excavators, the digging machines used for, but not limited to: Digging, demolition, minning, river dredging, heavy lifting, and with hydraulic attachments, brush cutting. It is these same hydraulic attachments that have expanded the use of excavators, far beyond their original use of excavation such as the Low-energy Planetary Excavator (LPE) proposed by NASA. The latest paper to be found on this Nasa proposal is for 2006, so the current status can only be guessed at, nevertheless, the concept is certainly intriguing as are the LPE's possible commercial applications. Basically, The LPE would be a general-purpose machine with the ability to mine ice, regolith, and rock; it would also support construction activities. The purpose and application is meant for future manned and unmanned missions to the Moon, Mars, and beyond. .Additionally, adaptations could be made for use in extreme-low gravity such as on asteroids. This idea of efficient and reliable an excavator that has usage on differing planetary surfaces and various materials has the goal of enabling exploration and bases from outposts to self-sustaining complexes. The LPE would be able to accommodate the different materials that are encountered on planetary surfaces as the LPE would sense geologic changes and respond to them by using the lowest cutting energy possible. Moving on the to the possible non-NASA commercial application it can be said that the same qualities of the LPE that apply to space would also attract terrestrial users or said differently, us earth bound creatures. As both business and government markets rapidly expand, so does the need for urban infrastructure. Using NASA's own words on the subject; "Urban construction settings restrict the use of explosives, to minimize damaging vibrations, making mechanical methods attractive. In addition, shallow tunnel construction is rapidly changing from cut-and-cover to wholly underground, because excavations disrupt city traffic. Coupled with increasing population, these factors enhance the market for innovatively flexible systems such as the LPE".If I could have said it better than NASA did, I would have. But I couldn't, so I didn't. Anyway, there you have it, both the past of excavators and a look at their future with the development of the Low-energy Planetary Excavator JC Curran owns and operates Excavators Models

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cluster suite & gfs problem since update
by Doug Tucker 04 Jan '08

04 Jan '08

I have a cluster that has been operational for some time and functioning flawlessly until a recent yum update. The last unflawed working kernel was 2.6.9-55.0.12.ELsmp. The current kernel is 2.6.9-67ELsmp. The problem appears to be some type of infinite recovery loop of sorts. It runs find for a few minutes, then the service restarts itself. What I am seeing in /var/log/messages is: Jan 3 11:17:47 engrfs1 clurgmgrd: [5614]: <err> nfsclient:skynet_disted is missing! Jan 3 11:17:47 engrfs1 clurgmgrd[5614]: <notice> status on nfsclient:skynet_disted returned 1 (generic error) Jan 3 11:17:47 engrfs1 bash: [27695]: <info> Removing export: 129.119.113.108:/mnt/disted Jan 3 11:17:47 engrfs1 bash: [27695]: <info> Adding export: 129.119.113.108:/mnt/disted (rw) It does this for every client definition on the service. After it gets to the last one, it then restarts the serivce: Jan 3 11:16:25 engrfs1 clurgmgrd[5614]: <notice> Stopping service disted_export Jan 3 11:16:26 engrfs1 clurgmgrd: [5614]: <info> Removing IPv4 address 129.119.113.180 from et h0 Jan 3 11:16:36 engrfs1 clurgmgrd[5614]: <notice> Service disted_export is recovering Jan 3 11:16:36 engrfs1 clurgmgrd[5614]: <notice> Recovering failed service disted_export Then adds the exports and starts services again: Jan 3 11:16:36 engrfs1 clurgmgrd: [5614]: <info> Adding export: 129.119.113.108:/mnt/disted (r w) Jan 3 11:16:36 engrfs1 clurgmgrd: [5614]: <info> Adding IPv4 address 129.119.113.180 to eth0 Jan 3 11:16:37 engrfs1 clurgmgrd[5614]: <notice> Service disted_export started And then starts over at the beginning again continuously. This is a production system and this behaviour is causing the clients to hang (of course) during the restart. Thanks much for your help! Sincerely, Doug Tucker

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Dump levels?
by Scott Ehrlich 04 Jan '08

04 Jan '08

I created a cron job to invoke a dump script according to Tower Of Hanoi. I am dumping a subdirectory and a filesystem. The backup script, with some other lines removed: /path/to/dump -0 -fv /dev/nst0 /var/log /path/to-dump -3 -fv /dev/nst0 /home When viewing the dump logs, it looks like it is taking the whole job as a level 0. Am missing something? Thanks. Scott

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Backup
by Ruslan Sivak 04 Jan '08

04 Jan '08

We have a RHEL2 server that has had one of the drives in the raid array fail. I would like to do a full backup of the system before we replace the raided drive, in case the second drive decides to die during the procedure. What is the recommended way to back up a linux system? I was thinking of doing a snapshot, but the system is ext3 with no LVM. It has been suggested to hook up a usb drive and do an rsync of /. Are there any better solutions? The reason I wanted a snapshot is that I wanted to get an image of the disk, so that I wouldn't have to reinstall and reconfigure all the apps. Russ

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Re: [CentOS] Random files in homedir gets deleted
by Ross S. W. Walker 04 Jan '08

04 Jan '08

Do what I do when I need to setup a new Linux facility. Google "linux audit" I remember getting a good hit near the top with that. There are cli tools for adding files/folders/mounts to the audit system and you can tailor which type of activity to audit. It's no where as difficult to do as it sounds. -Ross -----Original Message----- From: centos-bounces(a)centos.org <centos-bounces(a)centos.org> To: CentOS mailing list <centos(a)centos.org> Sent: Fri Jan 04 04:25:17 2008 Subject: RE: [CentOS] Random files in homedir gets deleted > You can enable auditing to determine if the files are disappearing due to human/machine intervention (audit file system deletes) or if it is due to file system corruption (files disappear and no delete audits recorded). > > It may just be an errant rsync script. > > -Ross How do I enable auditing of the home dir? /Christopher _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.

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Palm Vacations, Look At A Jamaica Vacation For Total Relaxation
by Super Star 04 Jan '08

04 Jan '08

Palm Vacations, Look At A Jamaica Vacation For Total Relaxation There is no place like Jamaica for a vacation that consists of total relaxation. After all, isn?t that what a vacation is for? Get away from the office, get away from people demanding your time, get away from customers demanding the impossible, just get away. But where you ?get away to? will have a significant impact on how you view the success of your vacation and how much relaxation you really get from it. A Jamaica vacation is your best bet. Jamaica is close enough to the US to where your airfare to get there is not a major consideration. You will need a passport but that can be handled if you plan ahead. The phones are not ringing, and your choice of hotels and accommodations range from a casual bed and breakfast to the much more luxurious all inclusive resort type. The first thing you need to do is to find cheap airline tickets. Do your research here because like traveling anywhere else, the price of the tickets can vary greatly. Your best days to travel, if you have a choice, are Tuesdays and Wednesdays, which are typically very light travel days. Check online, and also check with your local travel agency. Your local travel agency may be able to combine a hotel and airfare into one package, which will save you even more. If you have frequent flyer miles you can redeem, a trip to Jamaica should not cost you more miles than any other destination. Do the same thing when shopping for a hotel room. If you are feeling a bit adventurous, you may want to try one of the many bed and breakfast inns around the islands. These will give you a taste of the local culture and will be much less expensive for you. But if you are looking for the ultimate in rest and relaxation, you might want to cough up the extra dollars to get a room at one of the all inclusive resorts. These resorts have everything you need under one roof, all within the grounds of the resort, so that you may not even have to leave the resort after you arrive! One tip here ? find your best rate by shopping online, and then invest a bit in long distance calls to see if you can get a better rate by calling the hotel or resort directly. Many times this is possible, and it can make your Jamaica vacation even better. The one thing that people complain about is the phone service in Jamaica. It is not the best. But then again, you took a Jamaica vacation to RELAX, so why are you worried about the telephones? Get away from the phones and checking in with the office. Really, they can go on without you and will still open for business tomorrow. Long distance calls that originate in Jamaica are costly, so be sure you bring your calling card that allows for an international origin if you anticipate really needing to make a phone call. Planned correctly, a Jamaica vacation can be your best bet for relaxation. Be sure to investigate all that Jamaica has to offer, and you will probably wonder why you did not vacation to Jamaica sooner! Jon is a computer engineer who maintain a variety of web sites based on his knowledge and experience. For more information about a Jamaica vacation, please visit his web site at Vacation Jamaica Now.

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[CentOS] United Built Homes, Flipping Real Estate or Flipping Paper?
by Super Star 04 Jan '08

04 Jan '08

United Built Homes, Flipping Real Estate or Flipping Paper? Flipping real estate properties is not for everybody but it is the fastest way to make a buck in the real estate business. Most everybody has heard of someone buying a "run down" house for a good price well below market value, fixing it up and selling it at a fair market price. Flipping a "fixer-upper" is definitely one way to turn a reasonably quick profit. I know some people who do it this way but they are more into the contractor and renovation business than they are of the investor mindset. Some of these "fixer-upper" properties are in need of extensive repair and will involve electrical work, carpentry work, etc. If the investor gets involved and does some or all of this work then there could be enough profit there but if the investor farms out the required labour, profits could get eaten up quickly. For these types of flipping real estate investments, the purchase price needs to be at a huge discount and normally would be found somewhere in the foreclosure stage. For the person that is in the mindset of investing rather than being in the renovation business then flipping real estate will only involve flipping the paper contract of the property without even taking possession of it. You can flip by entering an agreement to buy a property then sell the contract to another investor before close of escrow. Using this technique won't even require you to put your name on the title. Profits will generally be less than the fixer-upper investor but involves much less work and the whole process is much quicker. A fixer-upper investor would not be happy in making a profit of a few thousand dollars for a few months work on renovations but an investor that can just flip a contract for a few hours or days work would be. Avoid disclosure of your profits to the new buyer by using a double closing. After making a sweet deal and flipping a contract involving a juicy profit you may not want all these details to be revealed to your buyer. The solution is a double closing, transferring the property to you initially and then reselling immediately at the same lawyer's office just an hour later to your buyer. There is a drawback here and that is a double set of closing costs so you would have to weigh it out to see if it's worth it to your particular situation or not. Further, you can use a title insurance company for the actual closings. For the issuance of the title insurance policy, the title insurance company will prepare the closing documents and close the transaction usually without an addition charge.

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Martin Pelmore, Credit Cards For Students Offer Convenience And Safety
by Super Star 04 Jan '08

04 Jan '08

Martin Pelmore, Credit Cards For Students Offer Convenience And Safety Credit cards for students are a great deal for many individuals and groups. Parents will find that credit cards provide a convenient way to provide for their children away at school. Credit cards for students eliminate the necessity of students carrying around a lot of cash to pay for their tuition, fees and miscellaneous expenses. Credit cards for students can be in the name of the student but paid through the account of a parent. Credit cards for students give parents ways to let their students meet expenses while so far away from home. The credit cards for students provide a record of the expenses for each student. Credit cards for students pay for many different things. Students can pay for their books and tuition, but they can also pay for a cup of coffee or their laundry. The students do not have to write out a check or keep lots of money on them to pay for the cup of coffee, their laundry and other incidental expenses. Credit cards for students also allow them to call home often to let their parents know what is happening in their lives. Many parents hope this is one task the students will take care of with the credit card, but students sometimes do not always act responsibly with the credit card. Credit Cards For Students Help Them Establish Credit Many banks and financial institutions offer credit cards for students because this is a great time to get these people as customers. This is often the first time that these students are away from home and on their own. These students are often very dependable people because they are serious about their education. The banks and financial institutions that offer these cards for students often believe that the college students are smart children. They often believe that students will get good jobs when they complete their education. Credit cards for students help them establish their credit. Often the banks and financial institutions will only give credit to those who have proved that they can handle it. The banks and other financial institutions usually offer these students a limited amount of credit. If they can handle the small amount properly, they will be able to get more credit based on their records. These credit cards can be a very good arrangement for the students and the financial institutions if the students prove to be dependable. Roland Parris Jefferson III is an online researcher based out of Los Angeles, California. Need more details and expert advice on Credit Cards? Then please visit our Credit Cards For Students Resource.

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