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• Which tool / technology: System management for databases and dependent services

  - by Filburt

  I'm looking for advice on how to enable our team to take down and re-start our company systems for maintainance purposes. The scenario includes several Oracle db machines several MS SQL Server machines with multiple instances windows services (IIS etc.) BizTalk EAI solution Apache and Tomcat instances lots of scheduled tasks on win2003 and win2008 machines (physical and virtual). The main focus is on capture all dependencies between said databases and services and tasks connecting to them. At the moment an enterprise class solution is not an option. We are considering developing a solution driven by PowerShell scripts but I hope for some more suggestions.

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• Minutely cron, ensuring only a single instance

  - by Christopher Nadeau

  Is there a way to run a script every minute (or 2, or 5, etc), but only if it isn't already running? We have a set of scripts that need to run every minute. Sometimes they might start and finish in a second, other times they might go on for 5 minutes. Our current way of avoiding simultaneous executions is by setting a is_running flag in each script, and exiting if it's still enabled. But this is a little unreliable (i.e., fatal errors would cause the flag to remain enabled even after the script halted). We could write our own little manager, but I'm wondering if there is a more fashionable solution that already exists.

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• nginx not acknowledging passenger_root option

  - by lowgain

  I'm running a sinatra app on passenger, and trying to hook it to nginx. The relevant part of my config looks like: http { passenger_root /path/to/gem; #this is a valid path passenger_ruby /path/to/ruby; #ditto #etc... server { listen 80; server_name hello.org; root /path/to/stuff/public; passenger_enabled on; } } Whenever I start nginx however, I get: Starting nginx: [alert]: Phusion Passenger is disabled becasue the 'passenger_root' option is not set. Please set this option if you want to enable Phusion Passenger. What am I missing here? Thanks!

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• Snow Leopards Desktop Icons keeps Resizing Repeatedly

  - by Arashi

  I'm using a new macbook 10.6.5. I've been using mac OS for years. However, the problem that I'm getting is that the desktop icons keep resizing repeatedly. It keeps going to the biggest size possible and its driving me crazy. I've been resizing it back to medium size all the time. But when I start doing something at the finder it starts resizing by itself once again. Is there a fix to this problem? Please help.

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• dell vostro 1310 with nVidia 8400M display problem

  - by Arthur

  Hi everyone, i hope someone can help me with this problem. I have a Dell vostro 1310 Laptop with 32 bit vista and a 8400M nVidia chip. Recently i have noticed performance issues when my girlfriend was playing Sims 3, and then one day i turned it on and all i got was a thick white line at the bottom of the screen. i heard the OS start up so automatically i thought it was a damaged screen, but i had doubts so i plugged it into an external display via the vga port. it worked but everything appart worm the OS choice menu looks distorted beyond belief. even the bios screen had multicoloured lines running down the screen. The resolution is non existant, the screen only shows a 256 colour pallette and is heavily distorted. i barely managed to get to the device manager where i found the gfx card with an exclamation mark. does anybody have suggestions? should i buy a new mobo or are repairs possible? thanks in advance

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• wbadmin incremental system state backup

  - by user74513

  I am doing system state backups on a Windows Server 2008 R2 Enterprise (Service Pack 1) machine and expected the backups after the first one to be incremental. However with each backup a new directory with vhd files are created and the vhd files are almost the same size as the with the first backup. So the backups does not seem to be incremental. I used the following command to do the backup: wbadmin start systemstatebackup -backupTarget:f: I played around with the settings under "Configure Performance Settings" in the Windows Server Backup plugin in Server Manager but according to the description at the top of the dialog these settings are not applied to system state backups. Are there any settings available for wbadmin system state backup to make the backups incremental?

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• Factory Reset Asus

  - by Ben

  I have an ASUS All-in-one PC (not sure what model) and I'm trying to perform a Factory Restore but nothing is working yet. I have tried pressing F8, all I had access to was "Restore from an earlier point" - Today was the earliest point; and "Restore from an Image" - which I don't have. I have tried pressing F9, F10, and F11, but all that brought me was options to Start Windows normally, Run a system diagnostic, or try other options (F8 menu). I don't have any other discs to restore from or anything, and I have found a tutorial to try and create a Partition(?) to load the restore from that. Does anyone have any other ideas?

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• MSExchangeMailSubmission service is not listed or running; sent mail not working

  - by InterMurph

  I am running a new Exchange 2007 SP1 system. I moved the mailboxes from the old Exchange 2003 server, and incoming mail is working. But outgoing mail is not working at all; even inside my domain. Lots of debugging and searching lead me to believe that the problem is that the "Microsoft Exchange Mail Submission Service" (AKA MSExchangeMailSubmission) is not running. In fact, it's not even listed in the Services list. This document (http://technet.microsoft.com/en-us/library/aa998342.aspx) says that this service is installed by the Mailbox server role. My server is running the Mailbox role, as well as the Hub Transport and Client Access roles. How do I get this service to show up in the list, so that I can start it up? Thanks.

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• Google Chrome suspicious connections

  - by Poni

  I'm using Chrome at Windows and with TCPView (of the SysInternals freeware suit) I see that chrome.exe establish connections to these IPs: 173.194.37.104 209.85.146.138 Using http://www.ipaddresslocation.org/ I check about these IPs and see they're related to Google. Now, in order to clarify, these are the exact things I do: Open up chrome, the default page is set to BLANK (i.e no homepage whatsoever). Then I get into my website which has a blank page, so no "other" http requests are made. Right from this point there is a persistent connection, usually to '173.194.37.104'. What are these?? Very suspicious.. Edit #1: - I'm in 'incognito' mode right from start, when launching Chrome, using a shortcut with the '-incognito' switch. - I've turned off all phishing protections and other "advance" features in order to reduce Chrome's network activity.

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• face book security problem

  - by SHAN

  *- Please review recent activity on your Facebook account "Your account was recently accessed from a location we're not familiar with. For your protection, please review your recent activity to make sure no one is using your Facebook account without permission. Reviewing your activity takes just a few moments. We'll start by asking you a couple of questions to confirm that this is your account. (If we recognize your computer, you'll be able to skip this step.)" WHEN I TRY TO LOG MY FACE BOOK PROFILE;ABOVE MESSAGE DISPLAYING....WHAT IS A REASON FOUR THIS MATTER? AND AFTER I CLICKED CONTINUE BUTTON SHOW SOME 4TO MY FB FRIENDS BUT I EXACTLY CANT RECOGNIZE THESE 4TOES.. BECAUSE OF THAT I CANT LOG MY FB PROFILE.NOW HOW I LOG TO MY FB PROFILE...?? PLZ HELP ME SOLVE THIS PROBLEM...!!

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• webm html5 videos lose connection with apache server

  - by Jizbo Jonez

  webm html5 videos that are played through a domain on my server sometimes lose connection. A video that is playing will start to buffer and then stop part of way through with that message "Video playback aborted due to a network error." displayed on the html5 video player. I am delivering the webm videos via a php script on an LAMP server. There doesn't seem to be any errors in the server logs. Is there any php.ini settings or httpd.conf that I need to set? I recently set 'Keep Alive" to "on" in httpd.conf could that be causing this?

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• Bridging LXC containers to host eth0 so they can have a public IP

  - by Vianney Stroebel

  UPDATE: I found the solution there: http://www.linuxfoundation.org/collaborate/workgroups/networking/bridge#No_traffic_gets_trough_.28except_ARP_and_STP.29 # cd /proc/sys/net/bridge # ls bridge-nf-call-arptables bridge-nf-call-iptables bridge-nf-call-ip6tables bridge-nf-filter-vlan-tagged # for f in bridge-nf-*; do echo 0 $f; done But I'd like to have expert opinions on this: is it safe to disable all bridge-nf-*? What are they here for? END OF UPDATE I need to bridge LXC containers to the physical interface (eth0) of my host, reading numerous tutorials, documents and blog posts on the subject. I need the containers to have their own public IP (which I've previously done KVM/libvirt). After two days of searching and trying, I still can't make it work with LXC containers. The host runs a freshly installed Ubuntu Server Quantal (12.10) with only libvirt (which I'm not using here) and lxc installed. I created the containers with : lxc-create -t ubuntu -n mycontainer So they also run Ubuntu 12.10. Content of /var/lib/lxc/mycontainer/config is: lxc.utsname = mycontainer lxc.mount = /var/lib/lxc/test/fstab lxc.rootfs = /var/lib/lxc/test/rootfs lxc.network.type = veth lxc.network.flags = up lxc.network.link = br0 lxc.network.name = eth0 lxc.network.veth.pair = vethmycontainer lxc.network.ipv4 = 179.43.46.233 lxc.network.hwaddr= 02:00:00:86:5b:11 lxc.devttydir = lxc lxc.tty = 4 lxc.pts = 1024 lxc.arch = amd64 lxc.cap.drop = sys_module mac_admin mac_override lxc.pivotdir = lxc_putold # uncomment the next line to run the container unconfined: #lxc.aa_profile = unconfined lxc.cgroup.devices.deny = a # Allow any mknod (but not using the node) lxc.cgroup.devices.allow = c *:* m lxc.cgroup.devices.allow = b *:* m # /dev/null and zero lxc.cgroup.devices.allow = c 1:3 rwm lxc.cgroup.devices.allow = c 1:5 rwm # consoles lxc.cgroup.devices.allow = c 5:1 rwm lxc.cgroup.devices.allow = c 5:0 rwm #lxc.cgroup.devices.allow = c 4:0 rwm #lxc.cgroup.devices.allow = c 4:1 rwm # /dev/{,u}random lxc.cgroup.devices.allow = c 1:9 rwm lxc.cgroup.devices.allow = c 1:8 rwm lxc.cgroup.devices.allow = c 136:* rwm lxc.cgroup.devices.allow = c 5:2 rwm # rtc lxc.cgroup.devices.allow = c 254:0 rwm #fuse lxc.cgroup.devices.allow = c 10:229 rwm #tun lxc.cgroup.devices.allow = c 10:200 rwm #full lxc.cgroup.devices.allow = c 1:7 rwm #hpet lxc.cgroup.devices.allow = c 10:228 rwm #kvm lxc.cgroup.devices.allow = c 10:232 rwm Then I changed my host /etc/network/interfaces to: auto lo iface lo inet loopback auto br0 iface br0 inet static bridge_ports eth0 bridge_fd 0 address 92.281.86.226 netmask 255.255.255.0 network 92.281.86.0 broadcast 92.281.86.255 gateway 92.281.86.254 dns-nameservers 213.186.33.99 dns-search ovh.net When I try command line configuration ("brctl addif", "ifconfig eth0", etc.) my remote host becomes inaccessible and I have to hard reboot it. I changed the content of /var/lib/lxc/mycontainer/rootfs/etc/network/interfaces to: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 179.43.46.233 netmask 255.255.255.255 broadcast 178.33.40.233 gateway 92.281.86.254 It takes several minutes for mycontainer to start (lxc-start -n mycontainer). I tried replacing gateway 92.281.86.254 by : post-up route add 92.281.86.254 dev eth0 post-up route add default gw 92.281.86.254 post-down route del 92.281.86.254 dev eth0 post-down route del default gw 92.281.86.254 My container then starts instantly. But whatever configuration I set in /var/lib/lxc/mycontainer/rootfs/etc/network/interfaces, I cannot ping from mycontainer to any IP (including the host's) : ubuntu@mycontainer:~$ ping 92.281.86.226 PING 92.281.86.226 (92.281.86.226) 56(84) bytes of data. ^C --- 92.281.86.226 ping statistics --- 6 packets transmitted, 0 received, 100% packet loss, time 5031ms And my host cannot ping the container: root@host:~# ping 179.43.46.233 PING 179.43.46.233 (179.43.46.233) 56(84) bytes of data. ^C --- 179.43.46.233 ping statistics --- 5 packets transmitted, 0 received, 100% packet loss, time 4000ms My container's ifconfig: ubuntu@mycontainer:~$ ifconfig eth0 Link encap:Ethernet HWaddr 02:00:00:86:5b:11 inet addr:179.43.46.233 Bcast:255.255.255.255 Mask:0.0.0.0 inet6 addr: fe80::ff:fe79:5a31/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:64 errors:0 dropped:6 overruns:0 frame:0 TX packets:54 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:4070 (4.0 KB) TX bytes:4168 (4.1 KB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:32 errors:0 dropped:0 overruns:0 frame:0 TX packets:32 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2496 (2.4 KB) TX bytes:2496 (2.4 KB) My host's ifconfig: root@host:~# ifconfig br0 Link encap:Ethernet HWaddr 4c:72:b9:43:65:2b inet addr:92.281.86.226 Bcast:91.121.67.255 Mask:255.255.255.0 inet6 addr: fe80::4e72:b9ff:fe43:652b/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1453 errors:0 dropped:18 overruns:0 frame:0 TX packets:1630 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:145125 (145.1 KB) TX bytes:299943 (299.9 KB) eth0 Link encap:Ethernet HWaddr 4c:72:b9:43:65:2b UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:3178 errors:0 dropped:0 overruns:0 frame:0 TX packets:1637 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:298263 (298.2 KB) TX bytes:309167 (309.1 KB) Interrupt:20 Memory:fe500000-fe520000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:6 errors:0 dropped:0 overruns:0 frame:0 TX packets:6 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:300 (300.0 B) TX bytes:300 (300.0 B) vethtest Link encap:Ethernet HWaddr fe:0d:7f:3e:70:88 inet6 addr: fe80::fc0d:7fff:fe3e:7088/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:54 errors:0 dropped:0 overruns:0 frame:0 TX packets:67 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:4168 (4.1 KB) TX bytes:4250 (4.2 KB) virbr0 Link encap:Ethernet HWaddr de:49:c5:66:cf:84 inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) I have disabled lxcbr0 (USE_LXC_BRIDGE="false" in /etc/default/lxc). root@host:~# brctl show bridge name bridge id STP enabled interfaces br0 8000.4c72b943652b no eth0 vethtest I have configured the IP 179.43.46.233 to point to 02:00:00:86:5b:11 in my hosting provider (OVH) config panel. (The IPs in this post are not the real ones.) Thanks for reading this long question! :-) Vianney

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• How do I customize zsh's vim mode?

  - by Jason Baker

  Ok, so I finally made the great change. In my .zshenv, I changed my EDITOR: export EDITOR=vim There are a couple of questions I have that are so minor that I didn't want to start separate questions for them. Here they are: How do I get zsh to distinguish between insert mode and command mode like in vim? Preferably this would change the cursor from an underline to a block like in vim, but displaying text at the bottom would work as well. How do I get it to act more like vim? For instance, I'd rather it be in command mode by default and not go out of it after one command.

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• Duplicate xserver

  - by hariks0

  When I start my ubuntu pc, just before my login, I receive a message that says "An xserver is already started in display :0. Would you like to try starting xserver in another virtual workspace?". Now If I answer 'No' the message appears again and again. If I say 'Yes' It goes to gnome desktop in virtual desktop 9 [Ctrl+Alt+F9] It was previously available only in [Ctrl+Alt+F7] but now available in both F7 and F9. Now I assume that there are two instances of xserver both in [Ctrl+Alt+F7] and [Ctrl+Alt+F9]. I think by killing one instance of xserver manaually I can disable the message. How do I do this? Thanks in advance.

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• My PowerShell functions do not appear to be registered

  - by Frank

  Hi there, I have a ps1 script in which I define 2 functions as such: function Invoke-Sql([string]$query) { Invoke-Sqlcmd -ServerInstance $Server -Database $DB -User $User -Password $Password -Query $query } function Get-Queued { Invoke-Sql "Select * From Comment where AwaitsModeration = 1" } I then call the ps1 file by typing it in (it's in a folder in the path, and autocompletion works) However, I cannot start using the functions. I am confused, because when I copy / paste the functions into the console, all is fine and they work. I also have a function defined in my profile, and it works. Where am I thinking wrong, why doesn't it work what I'm trying to do?

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• connect to ssh server thru 80 via HTTP proxy?

  - by im_chc

  Hi, Please help: I want to connect to my ssh server at home However, I'm behind a corporate (CORP) firewall, which blocks almost all ports (443, 22, 23 etc). But it seems that 80 is not blocked, coz I am able to surf the web after I login (i.e. IE sets to CORP's proxy server, and start IE - displayed CORP intranet portal - type in google.com - dialog pops up for userid + pwd - login successful, and surf without restrictions) My ssh server listens at 443. My question is: Is there a way to connect from a computer behind the CORP firewall to the ssh server thru the 80 port, with the ssh server still listening on port 443? Changing the ssh server to listen to port 80 is not an option, coz my home ISP blocks 80. Can I use a public proxy which listens at 80? After some research on google I found that there is something called "connect to SSH thru an HTTP proxy" using the Cockscrew software. Is it useful? Or is there some other way to solve the problem?

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• Disk space profiling in Unix

  - by user1677770

  I'm looking for a tool to summarize how disk space is being used on very large partitions. Our file system is around 950TB, mostly broken up into 20TB partitions. There are some really nice graphical tools for visualising these file spaces: http://www.disksavvy.com/disksavvy_screenshots.html http://methylblue.com/filelight/ But I'm really not sure how well they will scale. Does anybody have any experience of these tools and can make any recommendations? Even something that parses and summarises a really big du output would be a good start.

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• How can I receive more traffic? My VPS fails!!!

  - by qtrix

  I have a web site - photo gallery. About 400 photos. Site on Gallery 3. mySQL. Hosted on VPS from myhosting.com (CPU 1792 MHz, 2048 MB RAM). Everything seems to be ok, but there is one big problem. Once traffic reaches ~ 20 people (online) - website start loading really really slow. Actually website can't be loaded about 30-60 sec. What should I do? Buy more RAM / CPU on the same VPS? Move to a dedicated server or maybe myhosting.com just sucks? What do you recommend?

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• How to scroll up and look at data in GNU screen

  - by dorelal

  I am using a mac (snow leopard). I am a ruby on rails developer and I watched a screencast on GNU screen and am trying it out. So far I like it. On a window when I start server I get to see the log messages. However I can't seem to scroll up. I do get a scroll bar. However when I use the scroll bar and scroll up I don't see anything. How do people use GNU screen and scroll up?

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• Copssh, how to add users?

  - by Ken

  I installed copssh on Windows Vista (64-bit) here, and the installation seemed to go fine. It requires you to explicitly add users to log in, which is fine, so I opened the COPSSH Control Panel (really just an app), went to the Users tab, clicked Add, Forward, and the "User:" popup is empty. The "Domain:" popup has exactly one entry: my computer name. The "Documentation" shortcut in the start menu group is broken, but I found the folder it's supposed to point to, and I only see docs for command-line tools (which I'll investigate next). Is there something I'm missing? Is the COPSSH Control Panel just plain broken?

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• "A copy of Firefox is already open. Only one copy of Firefox can be open at a time."

  - by Isaac Waller

  I cannot start Firefox on my Mac. It just says "A copy of Firefox is already open. Only one copy of Firefox can be open at a time." I have tried restarting the computer. Any fixes? You have suggested deleting the lock files in my profile, but, I don't have a profile. I was trying to fix the problem in question http://superuser.com/questions/3275/firefox-on-mac-slow-slow-slow by deleting my profile, so I deleted it, and this came up. So I cannot delete the lock files because they don't exist.

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• Tracking down random BSOD on windows 7

  - by pehrs

  I have gotten a computer running windows 7 handed to me that randomly, several times a day, bsods with a PAGE_FAULT_IN_NONPAGED_AREA (50) or WHEA_UNCORRECTABLE_ERROR (124). Crashes happens regardless of load. I am running out of ideas for how to track this down. Analyzing the minidumps shows the crash to be in ntkrnlmp.exe/WMIADAP.exe System has plenty of power (600w) Ram checks out fine using memtest86+ over a weekend. System is clean inside. No dust build up. Temperatures stay low. As far as I know (and reliability history shows) no new drivers were installed for several months before the problems started. All drivers are now up to date. sfc /scannow reports the system as clean. CHKDSK reports the disks as clean Removing the AV (Avast) has no effect. Any more things that should be tried on windows 7 before I start replacing the hardware?

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• Linux kernel with grsec + Java / Apache Tomcat

  - by NoozNooz42

  I've got a Debian Linux 64 bit dedicated server. The kernel has the grsec patch applied. I'm mainly using this server to run Apache Tomcat (6.0.26, Java 6) and everything seems fine. The only issue, is that when I start Tomcat, I get a few of these: grsec: From xxx.xxx.xxx.xxx: Segmentation fault occurred at 00007fefe04e4000 in /home/t/jre1.6.0_20/bin/java[java:22403] uid/euid:1001/1001 gid/egid:1001/1001, parent /sbin/init[init:1] uid/euid:0/0 gid/egid:0/0 grsec: more alerts, logging disabled for 10 seconds Then no error logs anymore. Everything is fine. The kernel is: Linux 2.6.32.2-xxxx-grs-ipv4-64 #1 SMP Tue Dec 29 14:41:12 UTC 2009 x86_64 GNU/Linux And the webapp works fine. So there are segmentation fault when Tomcat starts, but everything seems to works fine. Is this concerning? Should I move to a non-grsec kernel?

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• Jan 2010 Microsoft update trashed my Win XP (64bit) PC

  - by Mark Pawelek

  I waited until this morning to install these 5 updates. My ancient Win XP (32 bit) PC has no problems but my Win XP 64 bit will not start. From the startup menu none of the 5 options given (e.g. safe mode, last known good configuration, etc) work. After selecting an option, the Windows Logo screen appears. About 9 seconds later a blue screen of death flashes [I can't read the error messages because it's there for about 100 ms] then it cycles through the reboot again. PS: This is a pretty cheap mobo (Ge Force) with an AMD 3 GH chip - but until today it did actually work. What should I do? Reinstall the O/S?

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• Symmetrix gatekeepers on Solaris 10

  - by Milner

  I have some Solaris machines that are connected to EMC Symmetrix for SAN storage. Apparently the Symm has a gatekeeper device that is used with the symmetrix CLI. We don't need the CLI, but I have these gatekeeper devices that constantly fill /var/adm/messages and the like with corrupt label errors. Is there anything I can do (short of deleting the devices on machine start) to get rid of them? Or should I just try to get our SAN guy to get the installer for the CLI? These things are getting annoying, and the devfsadmd daemon keeps rediscovering them on boot.

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