I need to check RAM on a server located in a data center several hundred miles away. So, I can't just walk over and boot to CD to run memtest86. Is it safe to run this while booted into the OS? Does anyone know of a knoppix pxe boot image? I can network boot to something...I just don't know what to network boot to.
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Can a Mac Mini, Server edition, be booted off either of its two disks?
I'm interested in having one disk with OSX Server on it, and the other a dual boot Linux/Windows, to get around OSX's fussiness about boot loaders.
I wrote a Perl script which will serve as a daemon, so I'd like to let the OS (in my case, Ubuntu Linux) automatically run my Perl script after it has booted up.
How can I do that?
I am in the process of creating a kickstart configuration file for some RedHat 5.5 and Centos 5.5 servers (Production and test respectively).I have googled about a bit but I cannot find a good list of the bare minimum packages required for a command-line system.If anyone knows how I can trim this list down anymore it would be much appreciated. The aim of this kickstart.cfg is to get the system booted to a bare minimum required to install Chef (Server management software). Chef will then setup Apache, Ruby on rails environment etc.
All this server will need to do is, from a static IP, Host a Ruby on rails app, send emails, send data to a server on the web, accept ssh and occasionally and connect to a SMB/CIFS share This list was taken from the anaconda-ks.cfg file after a RedHat install of what I thought was a pretty minimal system onto a VM but I noticed that cups, the avahi daemonsand gam_server are installed and running which I do not believe are needed for a pure web server.I know that these types of questions are hard to answer without a complete knowledge of the operating environment and what "minimum" is in this case ("@core only? but I wanted yum damnit!")
@admin-tools
@base
@core
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I am running a game server on an Ubuntu 11.04 box. The game is Minecraft. The biggest (smallest?) bottleneck for my server is the read/write/access time of data on the hard disk. I feel an SSD could make a huge difference in performance.The Minecraft map is stored in individual region files that are further divided into 'chunks'. Each file is between 64KB and 10MB each (depending on how 'developed' they are). Users are crafting the world and so are constantly loading these files and editing them while playing the game. I'm hoping to have about 15-30 users on at peak times, and 2 or 3 at minimum. The server would be up 24/7.The entirety of the game directory (the map, player data, config file, plugins, etc) is less than 1GB. So I don't need a lot of storage. I will be performing daily backups of the game data to a much larger HDD on the system.Considering this scenario, would you recommend against using an SSD? I've read 'DRAM-based' SSD's do not have write limitations.
View 1 Replies View RelatedI've been trying to run Memtest86+ ,4.0 and 4.1, first from the boot option and then from a bootable CD but it will not run for some reason. I get to the blue screen where my system stats are displayed, but on the top right where the test should be running there's nothing showing. I'm at a loss and need to test my memory as 10.04 has some random crashing on my machine.
View 6 Replies View RelatedIs it safe to put Samba Server outside your Firewall?
View 4 Replies View RelatedI install 10.04 on a Windows laptop using Wubi. It worked! However, I have no memtest86+ option on my menu. I am going to get some more memory soon so I would like to have that feature on my boot menu. Went through this article [URL] Yes, memtest86+ is installed, has the +x flag on the appropriate file, and all the pieces are present. Ran sudo update-grub and it shows it finding everything except memtext86+.
I'm at a loss at what to do now. If this was the old Grub, I suppose I could manually code in the memtest86+ line but since this is Grub 2, that wouldn't be a permanent fix.
Anyone know how to run memtest86+ from the Ubuntu 10.04 install CD without having to install Ubuntu? It used to be a menu option at boot, but now you just get the option to install or try Ubuntu. I want to test the RAM on an older system before I install.
View 9 Replies View RelatedI have been having trouble with one of my computers.It is a AMD 1800+ with 512 megs of PC2100 high density ram.I am running chrunchbang linux 8.10.2.The problems I am running into is programs freeze, slow way down, or quit out right.The screen saver looks as if it running in slow motion.I had read somewhere that bad memory could cause some of these problems. So I ran memtest86 from the boot menu.After it had ran for about an hour.It did one pass and it said I had about 300 errors.That is about I could understand from all the information listed.
What would be considered bad ram.What is an acceptable number of errors. I have 384 megs of low density (3x128) sticks that I can put back in the machine. Just don't want to dig the machine and ram out if I don't need to.
I need to first point out that I am a complete n00b when it comes to Ubuntu Server, and I managed to install Ubuntu Server 10.04.1 (on a screen-less Acer Aspire 5100 laptop) with Apache2, MySQL, OpenSSH, & PHP5. I currently have this server (hosting my website) behind a linksys router with only port 22, and 80 forwarded to its ip address. Now my question is: Would it be safe to configure a print server on the same machine in order to print from the 3 other computers on my router to one printer, or are there security risks involved (like what I have heard with LAMP servers and Samba on the same machine)? I am also wondering if it is safe the way I configured port 80 & 22? It has extremely long passwords, and I also went through the secure installation of one of the programs setting a root password too... But can somebody please help me with my server? I am very surprised I have gone this far in my first 2 weeks of my Web Scripting class too!
View 1 Replies View RelatedI have a box running Ubuntu 11.04 (natty). I have never run memetest before. Then, randomly, when starting up today, it ran memtest. Because memtest86+ is on a loop, it doesn't stop unless you stop it. So I tried restarting the machine - no good. It simply starts memtest again and runs the same testing loop. I cannot find any setting in the BIOS to disable memtest. how I can stop/disable memtest so I can USE my computer??
View 1 Replies View RelatedHas Linux some mechanism to test memory online as a background job, flag bad memory as unusable and warn the user if memory is faulty? Much like running Memtest86+ on a little chunk of memory every nth minutte until all memory is tested and then repeat over.
Edit: I did not make it clear that I want such a service running in the kernel. A (peak) performance hit should be avoided by running the test in small steps and only when the system have some CPU cycles to spare
Edit2: I meant this as a Linux kernel service that scans the memory in the background. Not meant to be run in userspace but a routine in the kernel itself, perhaps in the memory manager to make sure memory are sane!
I upgraded my 9.10 Ubuntu install last night using the Update Manager, everything downloaded fine, and appeared to install correctly. When it finished I got the message advising that my machine needed to reboot for changes to take effect. I checked my mail quickly before rebooting, and then let it do its thing. It shut down fine, then booted up and went into MemTest86. No real worries, so I wandered off expecting it to take 10-20 minutes. After 4 hours, though, I was starting to worry. A message at the bottom of the screen advised something along the lines that the test had been successful, and I could press Escape to exit.
I did, and my machine rebooted, and went back into MemTest86. I just figured I was being too impatient and left the test running all night. My machine has now been running MemTest86 for 16 hours, and while the timer is still running and the tests refreshing, my keyboard is not responding.
recently performed an upgrade to Ubuntu 10.10. when I rebooted, my GRUB menu showed only the memtest86+ option, rather than the usual options for Ubuntu, Fedora, Debian, Arch, and WinXP (which I haven't booted in a very long time, so I am almost 100% sure that it is not WinXP's fault. I was able to boot using a Live CD, and when I checked grub.cfg, all of my boot entries were still there. However, when GRUB itself actually loads, only memtest86+ is in the menu. I also checked that I can still boot by editing the memtest86+ option in grub so that it matched the entry for Ubuntu in grub.cfg, and it still booted correctly. However, I am curious as to why my GRUB is now forcing me to manually enter the boot entry on each boot. Here is my grub.cfg:
Code:
# DO NOT EDIT THIS FILE
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
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I've initialize a virtual disk and deleted the partition table didn't notice that i've done that to the wrong one, data still on the physical hard disks but....how I'll get my data back safe without losing it?
View 4 Replies View RelatedWhen I start ubuntu, memtest86+ work to testing memery... Nothing else show up.... just blue screen with testing. I can't log in to ubuntu I don't no how to fix that I tried to use live cd to edit grub, but no grub at all. maybe because i do something wrong from this answer: [URL]...
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I am having memory problems on my old Compaq PC, and am trying to run memtest86+-4.20 to check it. I downloaded the source file, and tried a compile, but had the following problem:
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how to get around this issue?
A week or so ago I ran an aptitude safe-upgrade and while it was updating mysql I suffered a power-failure. Now, this never really happens in Holland but of course this once it happened at the worst possible time.
I've tried a lot of different things to get mysql working again, but am running into all kinds of problems. First mysql won't shut off properly (it does startup with the computer but I can't connect to it at all) during an aptitude purge. If I kill the process mysql seems to purge properly, but I guess this is not the case because I wasn't able to install it then.
Things seem to have gone a bit more smoothly this time, however:
Code:
snek@snek-server:~$ sudo aptitude install mysql-server
Reading package lists... Done
Building dependency tree
Reading state information... Done
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I'm stuck in Memtest86, everytime i boot it gives me an option to go into BIOS, and then it says "Loading GRUB." After that it automaticly goes into memtest, and I've let it finish numerous times without giving me errors. I've installed Linux Mint 8 via Unetbootin, I have a nearly fresh install of windows 7 on my laptop.
View 1 Replies View RelatedI have had no problems with downloading/installing updates and programs, and everything worked fine. Until memtest came along. It ran by itself (I think my dad made it the first boot option in grub), and now if I try to install any packages or programs, it will either say "Grub installation failed" or that any packages I tried to install failed. If I removed memtest, would that make it possible for me to install stuff again? Or is there a way to work around it?the main error report I get is: "E: memtest86+: subprocess installed post-removal script returned error exit status 127"
View 1 Replies View RelatedI have a Wubi installation of Ubuntu 9.10 and am trying to upgrade to 10.04. The download of everything went fine, but it has stuck on the "installing the upgrades" part, about halfway through it keeps saying "Found linux image: /boot/vmlinuz-2.6.32-22-generic". It keep repeating this constantly. The status bar says "Preparing memtest86+" with about 14 minutes remaining.
View 2 Replies View RelatedI just recently installed Ubuntu 10.10 on my computer. Everything worked fine at first and then I started to fix all things I wanted to have on my laptop, programs and layout etc. And then I decided to restart the computer to make all the updates and installations work properly on my newly installed Ubuntu computer, but then it seems so that everything just crashed. When I started to computer again a blue screen saying "Memtest86 v4.10" came up. It is some sort of test of the computer's capacity I think. So I thought, ok fine, it is probably really good to do a test like that after a new installation. Like, standard procedure perhaps. It took 1 hour and then it said that no errors could be found on the computer and that I could click ESC to continue.
I did that but then when the computer restarted this blue screen showed up AGAIN and started up a new test (the same one)!!! I can't open up Ubuntu, I've tried several times. What should I do??? Is my computer broken now????
Upgrade from 10.10 -> 11.04 froze at "Setting up memtest86+".I haven't had any problems with 10.10, but I decided to do a Dist. Upgrade from the Update Manager, and I seem to be stuck at Installing Upgrades section of the update, specifically at this point:
Setting up busybox-static (1:1.17.1-10ubuntu1) ...
Setting up dmidecode (2.9-1.2build1) ...
Setting up ed (1.5-1) ...
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Used 9.10 for months without issues Today it booted up in low resolution for some reason ?!?! Played around a bit with display - which now it cant reconise Now only boot up to the black screen with login prompy tried sudo /ect/init.d/gdm start No joy always go into login screen with black background
View 5 Replies View RelatedI have ubuntu 8.10 on Dell laptop. I wanted to install samba on it. It asked me about installing a lib. I said yes. and then it wanted to "remove" some packages. I agreed by mistake! and stopped it in the middle of removing. Now when ubuntu boots up, it boots normally: no graphic desktop!!. By crtl+alt+f2 and F7 it switches between graphic and normal. But the desktop does not have anything. Once it boots, it says:kinit: resume from old one /var/.../uuid/. how to know what exactly is deleted? And how to repair it? I tried "sudo apt-get -f install" but it errors that dependencies aren't met
View 1 Replies View RelatedI have Slackware64, v13.1, on my desktop PC, but the video card took a dump so I can't do much with it.Can I pull out the HD(IDE) and connect it to my laptop and boot via USB to run it? I haven't done much as far as customization goes, just running the huge.s kernal, adjusted the fstab, but that's about it.It's going to be a week before another video card arrives and I'd like to be able to get to my files and setup.
View 14 Replies View RelatedWindows has been crashing systematically on my old netbook, so I booted debian from a liveUSB. The reason I don't want to install it outright is that I didn't backup my files, so my plan was to do the backup with live debian. Yet, for some reason, Debian's "File viewer" doesn't "see" my HD files. That is, my disk is listed as a mounted device and I can see all its directories ("Downloads", "My Documents" and so on) but they all seem to be empty.
So I try from the terminal, where "dir" on /Downloads effectively returns the list of all the files I remember I had there. So on my first attempt I try to copy one single file to /home, that is,
Code: Select alluser@debian:/media/user/36AEF3F8AEF3AE8D/Users/xxxx/Downloads$ sudo cp filename.jpg /home
(/media/user/36AEF3F8AEF3AE8D is the mount point for the /dev/sda2 filesystem) and I get
Code: Select allcp: error reading 'filename.jpg': Input/output error
cp: failed to extend '/home/filename.jpg': Input/output error
I just received Ubuntu 9.10 desktop edition in the mail this morning. I ran the CD "live" in my HP Pavilion TX2510us Laptop. The laptop has no hard drive due to it failing in the past, So I have installed Ubuntu on a 1 TB external Hard disk. While Running the CD "Live", before installing it, The sound was working. But now that it is installed and booted up it does not work. I did a few searches and came across a few command lines that may help you guys figure out what is wrong. As Follows:
shannon@shannon-laptop:~$ aplay -l
List of PLAYBACK Hardware Devices ****
card 0: SB [HDA ATI SB], device 0: ALC268 Analog [ALC268 Analog]
Subdevices: 1/1
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On a new install of Fedora 12, I did the online update (using PackageKit). However, though the new kernel with images are seen in /etc/boot it still boots into the old kernel:
New-2.6.31.9-174.fc12
Old-2.6.31.5-174.fc12
Code:
$ uname -a
Linux LinuxFedora.HomePC 2.6.31.5-127.fc12.i686.PAE #1 SMP Sat Nov 7 21:25:57 EST 2009 i686
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