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• ImageMagick installation confusion

  - by Codemonkey

  Well this is turning out to be a pain. I'm on CentOS 6.5. I saw on the PECL ImageMagick changelog that they added a load of constants for new filters, such as LANCZOS2SHARP. Some testing I did earlier suggested that PhotoShop 6.5 was able to downsize photos with better clarity than my current ImageMagick's best effort of LANCZOS, so I thought I'd try to upgrade to test out the newer filters. So, first port of call - get source from pecl for 3.2.0RC1. Installed with no problems. But, ah-ha. Although it says it only requires IM 6.2.4, the filters I'm after don't work unless you have 6.6.6+ So I go http://www.imagemagick.org/script/install-source.php to install the newest version. This is the bit that's puzzled me. It all appears to have installed fined. The tests work fine, passing 40 out of 40. If I run identify -version on the command line it outputs 6.8.9 But if I echo Imagick::getVersion() in PHP it shows 6.5.4, even after restarting php-fpm. rpm -qa | grep ImageMagick shows that I still have 6.5.4 installed locate ImageMagic also only seems to show the 6.5.4 one I feel that the missing link here is ImageMagick-devel, do I need to install that too? How do I go about doing that? Or do I just need to reinstall the pecl-imagemagick 3.2.0RC1 now that I have the latest IM installed?

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• i7 x980 at 70% speed

  - by Buxley

  Hi we bought a nice computer to use to solve optimization problems. intel i7 X980@3,33 Mhz with 12 Gb of Team Group 1600 MHz ddr3 Ram. When we use Gurobi The Computer uses all 12 cores at maximum in the beginning of the solve. However after a while (about 8 hrs) it all cores jump between 65 and 85% When I solve the same models on an I7 930 all cores are at a near 100% level even after longer solution times. we first thought that the Harddisk was the bottleneck since Gurobi writes out nodefiles after the memorylimit is used. However since the new computer have 12 GB of Ram we put the memorylimit to 7 GB so the solver only used the RAM and still with the same performance in the processor. Any Ideas about the bottleneck? As I said earlier it works at 100% for the first hours or so . Thanks very much for any answers! Our plan was to overclock it but we can't even get it to work at normal speed yet!

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• Ubuntu 10.10 - PC shutdown before boot shortly after BIOS loads

  - by clem

  Hi - Since installing Ubuntu 10.10 from Karmic I've started getting problems with starting up the PC. I've done a complete wipe (Boot and Nuke) of the hard drive and reinstalled Ubuntu 10.10 but the problem still occurs. There is no dual boot on the PC, just Ubuntu. Here is the problem: Each morning, when I turn the PC on from being off overnight, the PC starts up and loads the BIOS. I get the following message : "Verifying DMI Pool Data... K8 NPT Data Change...Update New Data to DMI!....... Then poof the computer shuts off. However, after switching the computer back on around 6 or 7 times after it's turned itself off, it will eventually boot up without any problem. Also, once up and running for a while, I can shutdown and restart the PC first time, without any issues. I have also noticed a problem with the USB mouse being recognised and once I finally get the computer booted up, I need to unplug and then plug the mouse back in to get it working. I've opened the PC up and checked the connections (cables, cards and memory) and it all seems fine. The main issue with troubleshooting this problem is I cannot test any suggestions or fixes until the next morning because once the computer is up and running it will remain so! I do not leave the computer on overnight to save energy. So.. is this a hardware / boot software issue? This is a very odd problem and I have googled to no avail. Any suggestions? Many thanks Clem

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• Apache 2 settings for high traffic website

  - by Harry

  I'm having problems with the load on my website. It's an amazon ec2 server with 15Gb ram and 4 CPUs behind an LB. apachetop says I'm getting around 80 reqs per second which seems really low for this kind of server and the load ( given by top ) is usually around 15 but does increase to about 150 in 24 hrs. I'm seeing about 100 active apache processes at any time. Apache is in prefork mode. Mysql is used very little on the server and there are almost no static files. Here are my Apache settings: Timeout 20 KeepAlive Off MaxKeepAliveRequests 0 KeepAliveTimeout 3 <IfModule mpm_prefork_module> StartServers 40 MinSpareServers 25 MaxSpareServers 40 ServerLimit 400 MaxClients 400 MaxRequestsPerChild 4 </IfModule> Can anyone advise on how to tweak the settings? Thanx! Edit: The config was gotten by trial and error. Any and I mean by a number, change to these lines make the load skyrocket in like 5 minutes. It literally jumps to like 200-300 in a matter of minutes. Especially MaxRequestsPerChild. I've tried with 10, 15, 100, 1000 and the load just skyrockets. About php - there are actually only a few php files which aren't really that expensive at all. They just spit some simple stuff out. If I turn on KeepAlive load also goes to space..

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• How to fix "The connection was restarted"?

  - by Altar

  I have a php script with ajax. Few days ago, without making any changes, the script stopped working. The script is working sometimes but it is very slow. Other times it doesn't load completely. Yet other times it loads and empty page or it shows a "The connection was restarted" message. We have tried loading the page from 4 different computers in two different countries (two different ISPs). There is nothing relevant in the server's log. We contacted iPage.com hosting support. We sent screenshots. And all we manage to get from them was an incomplete screenshot and the message 'We tested. The page loads'. So, they won't admit the fault. It looks like they loaded the page once and declared it is working and went back to playing solitaire. I know their support. We had all kind of problems with iPage hosting. My questions are: 1. There is any way to make this error more easy to reproduce? I mean instead of fixing the error to get it appear more often. 2. There is any way to test a server response, to see if it drops connections?

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• saving data from a failing drive

  - by intuited

  An external 3½" HDD seems to be in danger of failing — it's making ticking sounds when idle. I've acquired a replacement drive, and want to know the best strategy to get the data off of the dubious drive with the best chance of saving as much as possible. There are some directories that are more important than others. However, I'm guessing that picking and choosing directories is going to reduce my chances of saving the whole thing. I would also have to mount it, dump a file listing, and then unmount it in order to be able to effectively prioritize directories. Adding in the fact that it's time-consuming to do this, I'm leaning away from this approach. I've considered just using dd, but I'm not sure how it would handle read errors or other problems that might prevent only certain parts of the data from being rescued, or which could be overcome with some retries, but not so many that they endanger other parts of the drive from being saved. I guess ideally it would do a single pass to get as much as possible and then go back to retry anything that was missed due to errors. Is it possible that copying more slowly — e.g. pausing every x MB/GB — would be better than just running the operation full tilt, for example to avoid any overheating issues? For the "where is your backup" crowd: this actually is my backup drive, but it also contains some non-critical and bulky stuff, like music, that aren't backups, i.e. aren't backed up. The drive has not exhibited any clear signs of failure other than this somewhat ominous sound. I did have to fsck a few errors recently — orphaned inodes, incorrect free blocks/inodes counts, inode bitmap differences, zero dtime on deleted inodes; about 20 errors in all. The filesystem of the partition is ext3.

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• How can I extract data from Toshiba Satellite with a dead Windows installation?

  - by msanford

  I've got a Toshiba Satellite (unknown model number but bought early 2010) running Windows Vista which throws a kernel error on boot. We don't have the restore/recovery CD any more to restore the Windows partition. I have managed to boot to a Live CD version of Ubuntu 10.10 and have mounted the internal hard drive (which takes nearly 8 minutes). I suspect that the hard drive is malfunctioning, however, because copy tasks of even 30 megs of data to an attached and mounted USB flash drive takes over an hour, and some files are mysteriously inaccessible (not a permissions issue). When browsing folders, it takes many minutes to populate the folder window even with a single tiny file. During the copy tasks, the hard disk sounds like it tries to sleep several times in rapid succession, then continues accessing, it sounds, at full throughput. I initially tried using scp (from the shell) to copy data but I encountered the same local problems. I don't know the S.M.A.R.T. status of the hard disk, either. Is there a more effective way of going about recovering the data on the internal disk, assuming that I can't use a recovery CD and am too cheap to bring it in (for now, at least)?

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• Windows 7: moved system partition, need to update boot partition

  - by Actorclavilis

  So, I have a decently standard Windows7/Ubuntu dual-boot setup, and (since Ubuntu is my usual operating system) I found I needed to grow my Ubuntu partition and shrink my W7 partition. Originally, my system (500G) looked like this: W7 Boot Partition (1.5G) Ubuntu (around 240G) W7 (same as Ubuntu) (on an extended partition, all by itself) Swap (rest of disk, around 16G) Now I'm no stranger to partitioning and filesystem tools, especially GParted, which I used on a Linux boot disk. After my partition editing, the partitions are laid out the same, except the Ubuntu partition is now 407G and the W7 partition is smaller to compensate. I had supposed, based on http://www.gparted.org/faq.php, that I would be able to run the W7 install disk in recovery mode and have it deal with the rearrangement, then possibly reinstall GRUB or something. Well, now the W7 install disk doesn't even see my W7 installation. All my files are there, the NTFS is perfectly clean, no problems there, but the install disk won't notice it. (Of course, the GRUB entry works fine but the W7 boot partition (which I didn't change) refuses to boot it.) So, basically, any ideas on how to fix this? I don't especially want to rerun the entire install procedure because I'll have a bunch of programs to reinstall (never mind redoing GRUB), but I fear that might be the only option. Thanks.

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• Hibernate & Sleep broken after IE 9 RTM installation in Windows 7 x64.

  - by AKa

  I have a question about hibernation. I installed Internet Explorer 9 RTM x64 on my Windows 7 x64 SP1 desktop machine. After this, computer don't entry the hibernation or (hybrid) sleep state properly. After I hibernate the computer the monitor become blank screen and the keyboard and mouse are inactive. But the machine is still running and there isn't any possibility to switch them off as only with power button. But this is recognized on next start as ineligible because of log entry with message “The previous system shutdown at xx:xx:xx on ?xx.?xx.?x was unexpected“ and menu with safe mode option. I’m clearly not sure if it has something to do with Internet Explorer installation, but I’m definitely guaranteed that before of this I never had some problems with hibernation or (hybrid) sleep. In Windows logs isn’t something suspect. I switched the hibernation off and on, installed new drivers for mainboard, graphic and network card, checked the hard disk, nothing was helpful. This is really sad, beacuse I don't like to switch the computer completely off because it takes longer to boot. Any suggestions?

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• Did Adobe Photoshop just killed my Graphics Card for good?

  - by user6004

  I was working with Adobe Photoshop, just some regular work, when I came to edit a PSD file and change the text of some layer, when all of a sudden the PC froze. No mouse, screen is frozen, keyboard strokes aren't getting me anything, no Task Manager, nada. So I rebooted my PC, and then something quite terrifying appeared before my eyes. It was not the Checkdisk utility that was launched, that made me terrified (by the way, that reboot damaged the partition table of an external HDD that was connected at the time to my PC, but that's another story). It was the screen itself. Please have a look. So after Checkdisk finished and Windows loaded, I noticed that the resolution was not right. Instead of 1440x900 which I had set, it was 1280x1024. When I went to change it back, I had no option to change back to my old resolution, and has only 3 other general resolution properties, as if my Video Card (GeForce 8800 GTS btw) was not recognized. And what do you know, in the Device Manager it appeared with an exclamation mark. Inside the hardware, it said this: Windows has stopped this device because it has reported problems. (Code 43) Uninstalling the drivers, downloading the newest drivers from NVIDIA and installing them did not work. It always comes back to this. So, do you have any advice before I go out and buy a new graphics card? I thought this was the only option left, but maybe the experts at Super User can help me out. By the way, the dotted screen appears after every reboot, and I see the dots when the ASUS Motherboard screen shows up at boot. Thanks in advance.

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• Install Windows 8 on SSD and Program & Users on HDD

  - by Foe

  I have been dealing with a few problems while installing Windows 8 on my computer. On my old configuration, I had Windows 7 installed on my 60Go SSD, and my programs and user data on my 1To HDD, thanks to relative links. Yet, while installing Windows 8 on my SSD, he made a small partition on my HDD "System related". Plus, I'm afraid using only links is a bit cheap, and I saw lots of people messing with their registry when trying to put user data on another drive. I read a lot about optimizing Windows 8 for SSD, putting Users on another drive, and very similar situation that didn't quite correspond to what I was trying to achieve. Here's what I tried : http://www.eightforums.com/tutorials/4275-user-profiles-relocate-another-partition-disk.html Booting on Audit mode and using an XML to relocate Users didn't work as the specified version in the file is a test one, and I don't what to enter if I'm using the last release. Booting with the install DVD in repair mode to do a copy of the User and create a relative link, resulting in an error on the logon screen while entering my password saying that "The profile can't be load" (average translation of my error from french to english) Do anyone know how to do a clean separated install of Windows 8, with OS on a drive, and the other data on a second one ? Thanks.

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• Suggestions for cleaning up the mess after removing the "system tool" virus?

  - by Ross

  Hi! Last night I got infected with the "System Tool" virus. For those who don't know it disallows the user from executing any software, changes the desktop, stops all security software from running, and continually requests that you buy a Trojan security software. It took me a few hours but I finally managed to remove the software. To do this I went into my Ubuntu partition and searched out files that had been created around the time that I got infected and deleted the executable. Then I went back into my W7 partition and ran an MBAM full scan, an MSE full scan, an AVG bootable USB scan, and ran a ClamAV scan from my Ubuntu partition (Together these found 3 more infected executables). I also ran a Ccleaner full sweep and the registry cleaner just in case. I think I have found all of the problems but am still concerned that there might be a payload leftover from the virus that I didn't find. Do you have any suggestions of what else I can do to be sure. Just FYI I use W7 64 bit and MSE as my primary antivirus. I was using chrome when I got infected and it seems that it was due to a slightly out of date Java installation (MSE gave me a warning that the website had used a Java exploit and then my desktop changed to the classic "System Tools" desktop) Thank you very much for your help.

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• Incorrect Internal DNS Resolution

  - by user167016

  I'm having a DNS issue. Server 2008 R2. The first clue was that after being off the network for a month, I could no longer Remote Desktop into my workstation by name, it wouldn't find it. Both via VPN and internally. But if I connect using its IP, that works. Now I notice in the server's Share and Storage Management, in Manage Sessions, it's displaying the incorrect computer name for some users. So I try, for one example: Ping -a 192.168.16.81 Pinging BOBS_COMPUTER.ourdomain.local [192.168.16.81] with 32 bytes of data: - replies all successful Then I try Ping RICHARDS_COMPUTER Pinging RICHARDS_COMPUTER.ourdomain.local [192.168.16.81] with 32 bytes of data: -all replies successful In DHCP, .81 belongs to RICHARDS_COMPUTER I did try flushdns. Not sure if this is related, apologies if it's not, but when I try to connect, I also get prompted: "The identity of the remote computer cannot be verified. Do you want to connect anyway? The remote computer could not be authenticated due to problems with its security certificate. It may be unsafe to proceed.." It then lists the correct name as the name in the certificate from the remote computer, but claims that the certificate is not from a trusted authority. Any thoughts are most appreciated!

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• Ways of file copy

  - by Tim

  I sometimes found that when using simple right-click and copy-and-paste, some files/directories are not copied completely or not at all, because of various reasons, such as some saved webpage files/directories have some strange characters in their names or their names are too long. For example, in Windows 7, I save this webpage http://www.howtogeek.com/howto/windows-vista/working-around-windows-vistas-shrink-volume-inadequacy-problems/ completely in a very deep directories whose parent directories may have long names, I cannot copy its top ancestry directory, as Windows complains the filename for the saved webpage directory is too long. In Ubuntu, sometimes I can save a file with some special character such as newline under some directory. But when I copy that directory, it will say the file name has some special character and I will have to manually remove the character. Such cases are complained in both Windows and Ubuntu. I was wondering what some better ways to accomplish the copy job in both Windows and Ubuntu. For example, will archiving all to be copied into a single archive help? If yes how to do that? Thanks and regards!

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• Why is /dev/urandom only readable by root since Ubuntu 12.04 and how can I "fix" it?

  - by Joe Hopfgartner

  I used to work with Ubuntu 10.04 templates on a lot of servers. Since changing to 12.04 I have problems that I've now isolated. The /dev/urandom device is only accessible to root. This caused SSL engines, at least in PHP, for example file_get_contents(https://... to fail. It also broke redmine. After a chmod 644 it works fine, but that doesnt stay upon reboot. So my question. why is this? I see no security risk because... i mean.. wanna steal some random data? How can I "fix" it? The servers are isolated and used by only one application, thats why I use openvz. I think about something like a runlevel script or so... but how do I do it efficiently? Maby with dpkg or apt? The same goes vor /dev/shm. in this case i totally understand why its not accessible, but I assume I can "fix" it the same way to fix /dev/urandom

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• Why does the wireless network icon have a red X over it when everything seems to work?

  - by Kristo

  I booted my almost brand new laptop running Windows 7 this morning and noticed a red X through the wireless networking icon in the system tray. At first I thought something was wrong, but clicking on it shows a good connection to my wireless network. I had no problem getting here to post this question. I'm very new to Windows 7 so I have no idea how to troubleshoot this myself. Is there an actual problem here? Can I fix the icon so it doesn't falsely display an error (I assume that's what the red X means)? Here's what I know: I can get here to post this question. There's at least one unsecured network available that I'm not connected to. I can see a bunch of wireless networks, presumably from my neighbors' houses. There are no other computers turned on in my house right now. The device manager shows no problems with any devices. I can ping my default gateway, DNS, and yahoo.com with no problem.

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• Urgent: how to deny read access to a ExecCGI directory

  - by Malvolio

  First, I can't believe that that isn't the default behavior. Second, yikes! I don't know how long my code's been hanging out there, with all sort of cool secret stuff, just waiting for some hacker who knows Apache better than I do. EDIT (and apology) Well, this is sort of embarrassing. Here's what happened: We had some Python scripts available to the web, at /aux/file.py, which were not surprisingly at /var/www/http/aux . Separately, we were running an app server and Apache proxies through at /servlets/. A contractor had constructed the WAR file by bundling up all the generated files including the Python files (which are in a directory also called aux, not surprisingly), so if you typed in /servlets/aux/file.py, the web-server would ask the app-server for it and the app-server would just supply the file. It was the latter URL that this morning I happened to type in by accident and lo, the source appeared. Until I realized the shear unlikelihood of what I had done, the situation was rating about 8.3 on the sphincter scale. After a tense half-hour or so I realized that it had nothing to do with the CGI (and that serving files that were also executable would be not only foolish but also impossible), and was able to address the real problems. So -- sorry, everybody. Let the scorn-fest commence.

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• Should I update the kernel on a Linux machine?

  - by Legate

  As I understand it, updating to a new kernel (with the normal linux-image... package, not by rolling my own) requires a server restart. However, one of our servers (Ubuntu 10.04) is running several extensive screen sessions. Restarting kills those which is always a major hassle to their owners (mostly because of lost session histories). What should I do? I see several possibilites: Not doing anything, that is update only non-kernel packages (perhaps use apt-pinning?) Update the kernel, but not restart. (Is that smart? I seem to remember there might be some problems with loading kernel modules.) Updating the kernel and restarting. Is there perhaps some way to preserve the screen sessions? I guess it ultimately boils down to this question: How important is it to update the kernel? I posted this question here instead of askubuntu.com as I think this is not an Ubuntu-specific issue though this server is running Ubuntu.

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• Windows Server 2003 (w/Exchange) move to new machine

  - by James Booker

  I have an ageing domain controller (the only one on a 10-pc network) which needs rebooting often. I have a Dell Poweredge 2850 server doing nothing, so I'd like to move the DC to that, but here's the catch - I don't have Win2k Server Std install media any more as it's been lost. I purchased "Easus Todo Backup Advanced Server" which claims to be able to recover to dissimilar metal, but it's not quite working (although I don't think it's the product's fault) I know the server and PERC RAID card are good because I installed Ubuntu on the logical drive (4 x 72GB disks RAID 5) no problems. I've booted frmo the Easus Todo backup CD (which is WinPE based) and recovered to the logical disk on the RAID (after installing driver inside the WinPE environment from a NAS drive) The problem is when I boot the server, I can get the OS selection menu, but any option results in a blank screen, with no errors. I figure this is probably because the driver wasn't installed on the old machine (which is IDE-based (i know, i know!) and doesn;t have a RAID controller) I've booted from the CD and copied the mraid35x.sys file to the c:\windows\system32\drivers folder on the recovered system, but it makes no difference. I made a boot.ini with rdisks 0-10 defined, and booting from each of these resulted in a file error (i.e. 'this isn't a real disk') - the only disk that gets any response (the blank screen) is multi(0)disk(0)rdisk(0)partition(1) which just gives me the blank black screen and no disk activity. Is there any way I can force the drvier to be installed on the source system (so i can do a full backup again), i've tried right-clicking the oemsetup.inf and clicking install, but it didn't actually do anything. I attempted to force it with the 'Add new hardware' wizard and forcing with the 'have disk' option but it still gave me no hardware to select. Also I've got an identical machine running WinXP which uses the PERC driver successfully (which was obviously done at install time) and the boot.ini settings are the same : multi(0)disk(0)rdisk(0)partition(1) Any ideas would be appreciated.

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• Why can't I connect to my home SSH (SFTP) server? What am I doing wrong?

  - by Rolo

  I am new to this topic of creating a SFTP server on one's computer. I would like to be able to access the folder on my Windows XP computer via SFTP from another computer or a phone. The following is what I have done so far: I have installed SSH Windows and everything is setup correctly because I can access it (the folder on my pc) via WinSCP. I however cannot access it from my phone. It doesn't connect. The phone can be on the same wireless network as the Windows XP computer, but I would prefer to be able to access this when not in the same network. Now, from what I have read and understood, the following is the information needed to connect: 1) Host Name: This would be my computer's ip address which I access by typing ipconfig in a cmd prompt (I access this easily on my computer because I simply put in localhost or 127.0.0.1) 2) Port Number: That would be port 22 (I have also added this to my router in the port forwarding section). 3) Username: This would be my Windows XP username. This however is my full name, including my middle initial followed by a period. I am wondering if this is maybe causing problems in accessing it from my phone, since the name has spaces and punctuation (the period). 4) Password: The password of my Windows XP computer Extra Info: When I say phone, I mean an Android phone and I am using an ftp / sftp app to access my pc via the phone's cellular network (I also tried the wireless, but that didn't work as well). I have tried more than one program. On one program it tells me Connection timed out and on another it tells me "timeout:socket is not established" Also, I know that I can use the site noip, but I prefer to connect this way first. Also, because I am new to this, I would like to look into what exactly noip is doing and if they would be seeing my files as they are transferred from phone to pc. Thanking you in advance for your help.

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• running a laptop continuously

  - by intuited

  I have an experienced laptop — a Dell Latitude D400, with a Pentium M CPU — that I'd like to run as an always-on server. This model was launched in 2004; I got mine second-hand in about 2007. I've heard that continuous operation is generally not a good idea with consumer hardware, but am lacking in specific knowledge about related problems, and have little idea of how much such usage patterns would reduce the lifespan of the machine. I'm mostly concerned with the unit's core components; parts such as the hard drive which are readily replaceable are, well, readily replaceable. What sorts of things can I do to increase the lifespan of this machine under such circumstances? For example, I'm guessing that it would be wise to limit the CPU frequency or take other steps to keep the internal temperature low. However, I'm not sure where the point of diminishing returns would lie with such an approach — 50°C? 40°C? Would it be useful to suspend the machine periodically, for perhaps an hour each day, or a few hours each week?

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• Suggestions for transitioning to new GW/private network

  - by Quinten

  I am replacing a private T1 link with a new firewall device with an ipsec tunnel for a branch office. I am trying to figure out the right way to transition folks at the new site over to the new connection, so that they default to using the much faster tunnel. Existing network: 192.168.254.0/24, gw 192.168.254.253 (Cisco router plugged in to private t1) Test network I have been using with ipsec tunnel: 192.168.1.0/24, gw 192.168.1.1 (pfsense fw plugged in to public internet), also plugged in to same switch as the old network. There are probably ~20-30 network devices in the existing subnet, about 5 with static IPs. The remote endpoint is already the firewall--I can't set up redundant links to the existing subnet. In other words, as soon as I change the tunnel configuration to point to 192.168.254.0/24, all devices in the existing subnet will stop working because they point to the wrong gateway. I'd like some ability to do this slowly--such that I can move over a few clients and verify the stability of the new link before moving critical services or less tolerant users over. What's the right way to do this? Change the netmask on all of the devices to /16, and update gateway to point to the new device? Could this cause any problems? Also, how should I handle DNS? The pfsense box is not aware of my Active Directory environment. But if I change DNS to use the local servers, it will result in a huge slowdown as DNS queries will still be routed over the private t1. I need some help coming up with a plan that's not too disruptive but will really let me thoroughly test the stability of the IPSEC tunnel before I make the final switch. The AD version is 2008R2, as are the servers. Workstations are mostly Windows XP SP3. I have not configured the 192.168.1.0/24 as a site in AD sites and services.

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• Windows Server 2008 Alerting to Low memory

  - by t1nt1n

  I have a file and print server running on Windows 2008 R2 fully patched in a VSphere environment (ESXi 5.1 fully updated). Every evening between 19:20 and 19:30 our monitoring software reported that the available memory is 1% and performance is dire. There is nothing in the event logs to point to an issue. At this point in the evening I am general the only user on the system to check to see why these alerts are going off. Things I have done; Checked to see if any backups are running – None at all. Checked Scheduled tasks – None before or during this time period. Moved the VM to another host. AV is disabled to rule out that as the issue. The server does not have any problems during the day with memory when fully loaded with about 50 users. The server did have 4GB ram provisioned but I have increased this to 5Gb. Running PrefMon at the time (I will save the graphs tonight) There very little CPU usage at the time but RAM usage goes up.

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• Clean installation of RHEL 5.5 claims package "desktops" is missing

  - by TKguru42

  Hi all, I'm a student worker in the CS department of my university, so please forgive me for any unprofessional descriptions. Simplified explanations are appreciated. I recently replaced some bad graphics cards in a few public workstations. The machines are all the same model. Before putting them back on the network I did fresh installs of RHEL---first I tried 5.4, but yum update ran into all sorts of ugly dependency errors and if I tried to remove any of the problematic packages, the whole operating system FUBAR'd. Using RHEL 5.5 gave me the same errors during install saying that "java.1.5.1-sun*" and "desktops" were missing, but yum update didn't have any dependency problems. Now that I tried logging in through the GUI, I encounter no GUI past the standard RHEL login page. The desktop is a uniform light teal and there's no system tray. An xclock window and an xterm window are open, and Firefox opens automatically, but that's it. Nothing else. What's REALLY confusing is that the computer claims that gnome is already installed, except it clearly isn't working. Any help or advice is greatly appreciated. If it helps, our department uses kickstart to run our standard Linux installs. I can try to get the script if that would be of use. Thank you!

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• What character can be safely used for naming files on unix/linux?

  - by Eric DANNIELOU

  Before yesterday, I used only lower case letters, numbers, dot (.) and underscore(_) for directories and file naming. Today I would like to start using more special characters. Which ones are safe (by safe I mean I will never have any problem)? ps : I can't believe this question hasn't been asked already on this site, but I've searched for the word "naming" and read canonical questions without success (mosts are about computer names). Edit #1 : (btw, I don't use upper case letters for file names. I don't remember why. But since a few month, I have production problems with upper case letters : Some OS do not support ascii!) Here's what happened yesterday at work : As usual, I had to create a self signed SSL certificate. As usual, I used the name of the website for the files : www2.example.com.key www2.example.com.crt www2.example.com.csr. Then comes the problem : Generate a wildcard self signed certificate. I did that and named the files example.com.key example.com.crt example.com.csr, which is misleading (it's a certificate for *.example.com). I came back home, started putting some stars in apache configuration files filenames and see if it works (on a useless home computer, not even stagging). Stars in file names really scares me : Some coworkers/vendors/... can do some script using rm find xarg that would lead to http://www.ucs.cam.ac.uk/support/unix-support/misc/horror, and already one answer talks about disaster. Edit #2 : Just figured that : does not need to be escaped. Anyone knows why it is not used in file names?

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