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• ZFS - Impact of L2ARC cache device failure (Nexenta)

  - by ewwhite

  I have an HP ProLiant DL380 G7 server running as a NexentaStor storage unit. The server has 36GB RAM, 2 LSI 9211-8i SAS controllers (no SAS expanders), 2 SAS system drives, 12 SAS data drives, a hot-spare disk, an Intel X25-M L2ARC cache and a DDRdrive PCI ZIL accelerator. This system serves NFS to multiple VMWare hosts. I also have about 90-100GB of deduplicated data on the array. I've had two incidents where performance tanked suddenly, leaving the VM guests and Nexenta SSH/Web consoles inaccessible and requiring a full reboot of the array to restore functionality. In both cases, it was the Intel X-25M L2ARC SSD that failed or was "offlined". NexentaStor failed to alert me on the cache failure, however the general ZFS FMA alert was visible on the (unresponsive) console screen. The zpool status output showed: pool: vol1 state: ONLINE scan: scrub repaired 0 in 0h57m with 0 errors on Sat May 21 05:57:27 2011 config: NAME STATE READ WRITE CKSUM vol1 ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 c8t5000C50031B94409d0 ONLINE 0 0 0 c9t5000C50031BBFE25d0 ONLINE 0 0 0 mirror-1 ONLINE 0 0 0 c10t5000C50031D158FDd0 ONLINE 0 0 0 c11t5000C5002C823045d0 ONLINE 0 0 0 mirror-2 ONLINE 0 0 0 c12t5000C50031D91AD1d0 ONLINE 0 0 0 c2t5000C50031D911B9d0 ONLINE 0 0 0 mirror-3 ONLINE 0 0 0 c13t5000C50031BC293Dd0 ONLINE 0 0 0 c14t5000C50031BD208Dd0 ONLINE 0 0 0 mirror-4 ONLINE 0 0 0 c15t5000C50031BBF6F5d0 ONLINE 0 0 0 c16t5000C50031D8CFADd0 ONLINE 0 0 0 mirror-5 ONLINE 0 0 0 c17t5000C50031BC0E01d0 ONLINE 0 0 0 c18t5000C5002C7CCE41d0 ONLINE 0 0 0 logs c19t0d0 ONLINE 0 0 0 cache c6t5001517959467B45d0 FAULTED 2 542 0 too many errors spares c7t5000C50031CB43D9d0 AVAIL errors: No known data errors This did not trigger any alerts from within Nexenta. I was under the impression that an L2ARC failure would not impact the system. But in this case, it surely was the culprit. I've never seen any recommendations to RAID L2ARC. Removing the bad SSD entirely from the server got me back running, but I'm concerned about the impact of the device failure (and maybe the lack of notification from NexentaStor as well). Edit - What's the current best-choice SSD for L2ARC cache applications these days?

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• Apache2 will not start on OpenSUSE after enabling mod_pagespeed

  - by alpha1

  I have a linode VPS, running openSUSE 12.1 (A little outdated, but stable). I have installed the RPMS for mod_pagespeed. mod_pagespeed.conf has "ModPagespeed on". Restarting apache fails after enabling pagespeed. the errors are not very helpful. li361-39:/usr/lib64/apache2 # a2enmod pagespeed li361-39:/usr/lib64/apache2 # service apache2 restart redirecting to systemctl Job failed. See system logs and 'systemctl status' for details. li361-39:/usr/lib64/apache2 # systemctl status apache2.service apache2.service - apache Loaded: loaded (/lib/systemd/system/apache2.service; enabled) Active: failed since Thu, 06 Jun 2013 20:49:00 +0000; 1s ago Process: 6701 ExecStop=/usr/sbin/httpd2 -D SYSTEMD -k stop (code=exited, status=0/SUCCESS) Process: 6704 ExecStart=/usr/sbin/start_apache2 -D SYSTEMD -k start (code=exited, status=1/FAILURE) Main PID: 6637 (code=exited, status=0/SUCCESS) CGroup: name=systemd:/system/apache2.service li361-39:/usr/lib64/apache2 # a2dismod pagespeed li361-39:/usr/lib64/apache2 # service apache2 restart redirecting to systemctl li361-39:/usr/lib64/apache2 # And the error log (/var/log/apache2/error_log) is useless as well. [Thu Jun 06 20:48:59 2013] [notice] caught SIGTERM, shutting down [Thu Jun 06 20:49:12 2013] [warn] Init: Session Cache is not configured [hint: SSLSessionCache] [Thu Jun 06 20:49:13 2013] [notice] Apache/2.2.21 (Linux/SUSE) mod_ssl/2.2.21 OpenSSL/1.0.0k PHP/5.4.15 configured -- resuming normal operations EDIT This is from /var/log/messages Jun 12 14:24:14 li361-39 start_apache2[27951]: httpd2-prefork: Syntax error on line 116 of /etc/apache2/httpd.conf: Syntax error on line 34 of /etc/apache2/sysconfig.d/loadmodule.conf: Cannot load /usr/lib64/apache2/mod_pagespeed.so into server: /usr/lib64/apache2/mod_pagespeed.so: undefined symbol: ap_unixd_config Full Log is here: http://pastebin.com/hjnbZZTr I've tried looking for other logs and checking the mod_pagespeed.conf against posts claiming it works and nothing is striking as wrong. Any Ideas?

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• How to give a user NTFS rights to a folder, via Powershell

  - by Don

  I'm trying to build a script that will create a folder for a new user on our file server. Then take the inherited rights away from that folder and add specific rights back in. I have it successfully adding the folder (if i give it a static entry in the script), giving domain admin rights, removing inheritance, etc...but i'm having trouble getting it to use a variable I set as the user. I don't want there to be a static user each time, I want to be able to run this script, have it ask me for a username, it then goes out and creates the folder, then gives that same user full rights to that folder based on the username i've supplied it. I can use Smithd as a user, like this: New-Item \\fileserver\home$\Smithd –Type Directory But can't get it to reference the user like this: New-Item \\fileserver\home$\$username –Type Directory Here's what i have: Creating a new folder and setting NTFS permissions. $username = read-host -prompt "Enter User Name" New-Item \\\fileserver\home$\$username –Type Directory Get-Acl \\\fileserver\home$\$username $acl = Get-Acl \\\fileserver\home$\$username $acl.SetAccessRuleProtection($True, $False) $rule = New-Object System.Security.AccessControl.FileSystemAccessRule("Administrators","FullControl", "ContainerInherit, ObjectInherit", "None", "Allow") $acl.AddAccessRule($rule) $rule = New-Object System.Security.AccessControl.FileSystemAccessRule("Domain\Domain Admins","FullControl", "ContainerInherit, ObjectInherit", "None", "Allow") $acl.AddAccessRule($rule) $rule = New-Object System.Security.AccessControl.FileSystemAccessRule("Domain\"+$username,"FullControl", "ContainerInherit, ObjectInherit", "None", "Allow") $acl.AddAccessRule($rule) Set-Acl \\\fileserver\home$\$username $acl I've tried several ways to get it to work, but no luck. Any ideas or suggestions would be welcome, thanks.

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• Outlook 2010, 2007 Sync problems after migration from SMTP to Exchange

  - by kirgy

  Our organization recently switched from an SMTP server to an Exchange server, since then several user's Outlook's are not synchronizing their emails as expected with the Exchange server. Our move over from an SMTP server to an Exchange server consisted of adding the new Exchange account alongside the existing SMTP account, drag-dropping/copy-pasting folders client-side from the SMTP account in the folder pane in outlook, to the newly created Exchange account. The problem happens when a user moves an email to a folder from their inbox or another folder. At this point the email disappears from Outlook client side. Re-syncing the folder, send/receive, closing/opening outlook and even system reboots do not make this email reappear. The Outlook web interface (OWA) reports the email is in fact in the folder they placed it in, and is not deleted. Doing a "search all mail items" for the emails shows that the email is still there; not deleted nor removed. To add to the confusion, when new folders are created and the email is placed in these folders, the synchronization happens without any issue both client side and server side. As the emails are appearing server side, we are confident to presume this is a client side issue. We have tried adding/removing accounts on one system which resulted in the same issue. This was a very long and slow process due to the sheer volume of emails (20gig+ from most users). We have tried reinstalling outlook restoring accounts from back-ups which has not resolved the issue. We also tried upgrading one system from outlook 2007 to outlook 2010 which, again, did not resolve the issue. We have experienced issues with a lot of emails disappearing during the copy-over process in which I'm not convinced it was the best route of migration, but nonetheless we are where we are. Can anyone suggest potential avenues of solutions to resolve this issue? Thank you. Systems: Windows 7 (10 systems) Windows XP (2 systems) Outlook 2007 (2 systems) Outlook 2010 (7 systems) Problem Outlook systems: Windows XP, Outlook 2007 x 1 Windows 7, Outlook 2007 x1 Windows 7, Outlook 2010 x 2

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• Ubuntu 9.10 Only Sees 244 MB RAM, while BIOS and Windows Sees 1.5 GB

  - by nicorellius

  I have 1.5 GB of RAM installed on an older Dell, Pentium 4. I just installed Ubuntu 9.1 and the system is only seeing 244 MB of RAM, even though there is 1.5 GB on the system. The BIOS sees all of it. I ran a Knoppix disc and it only saw 25 MB upon booting. I made no particular changes to the installation taht would affect this. I looked through the BIOS and the only setting I could see was the AGP aperture. Not even sure what this is. Anyone know where I went wrong? I also tried moving the memory modules around on the board. Booted with the 1 GB stick, still saw 244 MB. NOTE - This same system, except for the hard drive, had Windows XP running on it. The user who ran it said that the RAM was good and always showed 1.5 GB. Here is sudo cat /proc/meminfo MemTotal: 250064 kB MemFree: 3832 kB Buffers: 13356 kB Cached: 52216 kB SwapCached: 19676 kB Active: 91504 kB Inactive: 113884 kB Active(anon): 60572 kB Inactive(anon): 82156 kB Active(file): 30932 kB Inactive(file): 31728 kB Unevictable: 0 kB Mlocked: 0 kB HighTotal: 0 kB HighFree: 0 kB LowTotal: 250064 kB LowFree: 3832 kB SwapTotal: 4883720 kB SwapFree: 4781204 kB Dirty: 496 kB Writeback: 720 kB AnonPages: 123796 kB Mapped: 23368 kB Slab: 17248 kB SReclaimable: 7932 kB SUnreclaim: 9316 kB PageTables: 5304 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 5008752 kB Committed_AS: 740372 kB VmallocTotal: 770600 kB VmallocUsed: 26008 kB VmallocChunk: 662544 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 4096 kB DirectMap4k: 114128 kB DirectMap4M: 147456 kB

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• How do I stop MSYS from transforming my compiler options?

  - by Carl Norum

  Is there a way to stop MSYS/MinGW from transforming what it thinks are paths on my command lines? I have a project that's using nmake & Microsoft Visual Studio 2003 (yeecccch). I have the build system all ported and ready to go for GNU make (and tested with Cygwin). Something weird is happening to my compiler flags when I try to compile in an MSYS environment, though. Here's a simplified example: $ cl /nologo Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 13.10.6030 for 80x86 Copyright (C) Microsoft Corporation. All rights reserved. /out:nologo.exe C:/msys/1.0/nologo LINK : fatal error LNK1181: cannot open input file 'C:/msys/1.0/nologo.obj' As you can see, MSYS is transforming the /nologo compiler switch into a windows path, and then sending that to the compiler. I really don't want this to happen - in fact I'd be happy if MSYS never transformed any paths - my build system had to take care of all that when I first ported to Cygwin. Is there a way to make that happen? It does work to change the command to $ cl -nologo Which produces the expected results, but this build system is very large and very painful to update. I really don't want to have to go in and change every use of a / for a flag to a -. In particular, there may be tools that don't support the use of the - at all, and then I'll really be stuck. Thanks for any suggestions!

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• vsftp login errors 530 login incorrect

  - by mcktimo

  Using Ubuntu 10.04 on an aws ec2 instance. I was happy just using ssh but then a wordpress plugin needs ftp access...I just need ftp access for one site www.sitebuilt.net which is in /home/sitebuil. I installed a vftpd and pam and followed suggestions that got me to the following state /etc/vftpd.conf listen=YES anonymous_enable=NO local_enable=YES write_enable=YES dirmessage_enable=YES use_localtime=YES xferlog_enable=YES connect_from_port_20=YES xferlog_file=/var/log/vsftpd.log secure_chroot_dir=/var/run/vsftpd/empty pam_service_name=vsftpd rsa_cert_file=/etc/ssl/private/vsftpd.pem guest_enable=YES user_sub_token=$USER local_root=/home/$USER chroot_local_user=YES hide_ids=YES check_shell=NO userlist_file=/etc/vsftpd_users /etc/pam.d/vsftpd # Standard behaviour for ftpd(8). auth required pam_listfile.so item=user sense=deny file=/etc/ftpusers onerr=succeed # Note: vsftpd handles anonymous logins on its own. Do not enable pam_ftp.so. # Standard pam includes @include common-account @include common-session @include common-auth auth required pam_shells.so # Customized login using htpasswd file auth required pam_pwdfile.so pwdfile /etc/vsftpd/passwd account required pam_permit.so session optional pam_keyinit.so force revoke auth include system-auth account include system-auth session include system-auth session required pam_loginuid.so /etc/vsftpd_users sitebuil tim /etc/passwd ... sitebuil:x:1002:100:sitebuilt systems:/home/sitebuil:/bin/sh ftp:x:108:113:ftp daemon,,,:/srv/ftp:/sbin/nologin /etc/vsftpd/passwd sitebuil:Kzencryptedpwd /var/log/vftpd.log Wed Feb 29 15:15:48 2012 [pid 20084] CONNECT: Client "98.217.196.12" Wed Feb 29 15:16:02 2012 [pid 20083] [sitebuil] FAIL LOGIN: Client "98.217.196.12" Wed Feb 29 16:12:33 2012 [pid 20652] CONNECT: Client "98.217.196.12" Wed Feb 29 16:12:45 2012 [pid 20651] [sitebuil] FAIL LOGIN: Client "98.217.196.12"

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• Windows 7 - "A disk read error occured. Press Ctrl + Alt + Del to restart"

  - by Senthil

  Problem: When I switch on my PC, after BIOS POST, a cursor is blinking for about 5 seconds and then I am getting this error message: A disk read error occurred. Press Ctrl + Alt + Del to restart. I am able to go into BIOS. But Windows loader doesn't even start. This message is shown after my motherboard logo comes and goes. Symptoms: I DID notice my system freezing for minutes at a time for past two days. Also, in the past two days, it stopped half way through the Window booting process. I had to do hard reset couple of times to get it working. But since today morning, I only get this error message. Configuration: Operating System: Windows 7 Ultimate 32-bit only. Hard disk: 1 Physical Disk - 80GB SATA Partitions: Two (2) - C: and D: File System: NTFS No drive encryption or compression is turned on. After I searched on the net, I have found people mentioning these possible causes: Hard Disk is physically failing Corrupt MBR Bad Sector I am planning to buy a new hard disk, install Windows on it and continue. But I need data from the old hard disk. The data I want is in D: drive, outside any Windows user folder, is not encrypted or compressed or protected in anyway. I think if someone/something can get the disk working again and knows NTFS, the data can be hopefully read. What steps should I follow to recover files from the defective disk? Update: I bought a new disk, installed windows on it and added the defective one as a slave. Then I was able to read the data from the defective hard disk. Though chkdsk found lots of errors, the files I wanted were not affected and I got them back :) I am not using that hard disk anymore though it seems to be working at the moment.

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• Laptops with easy heat sink service?

  - by Niten

  Can you recommend a current laptop model with easy heat sink access – or better yet, a removable air intake filter – making it easy to periodically clean out the dust and lint that always packs up in these things? Every laptop I've owned has eventually overheated on account of a clogged heat sink. (I suppose it doesn't help that I have a cat who loves to hang out where I'm working, or that my laptop is almost always running.) One of the things I really love about my current system, a Dell Inspiron 1420n, is how easy it is to service its cooling system: whenever I notice the fan starting to work harder and the CPU temperature climbing higher than it should be, I merely have to unscrew a single panel from the bottom of the machine, clean out the heat sink, and then I'm good for another few months. Which current models of the "business laptop" variety offer similar easy cooling system service? I'm looking for something roughly along the lines of: 14- or 15-inch display Nehalem-based CPU Solid construction – magnesium chassis or better (like the Inspiron) TPM (for BitLocker) ideal, but not mandatory Docking adapter ideal, but not mandatory Good battery life For example, the ThinkPad T410 would have been my top choice, but it seems like it would be a serious chore to service its heat sink. For the current MacBook Pros it looks downright impossible. No matter how nice the laptop is in other respects, it'll be of no use to me when it's overheating. So, any suggestions? Thanks in advance... (I'm constantly surprised that customers and manufacturers don't pay more attention to this feature, at least in the business laptop subcategory. In the last couple months I've fixed two friends' laptops which were also overheating due to clogged cooling systems; clearly I'm not the only one affected by this.)

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• How to improve Windows Server 2008 R2 to handle many connections?

  - by invisal

  It has been a few days so far that I am trying to figure how to solve this problem. First of all, I am running a website with an average daily page view of 350,000. Previously, all ads management (tracking click and impression that each ads has served) and content were served in a single server with the following spec: Server 1 OS: Windows 2008 R2 64-Bit CPU: Intel® Core™ i5 - 4 cores RAM: 8 GB Storage: 2 x 1 TB hard drives Bandwidth: 10 TB per month To improve our website speed, I decided to separate the ads management script to another dedicated server because we have more than 15 advertisers to 30 advertisers per each page. Server 2 OS: Windows 2008 R2 64-Bit CPU: Intel® Core™ i5 - 4 cores RAM: 4 GB Storage: 2 x 300 GB hard drives Bandwidth: 10 TB per month The Problem The problem is that Server 1 can handle both content and ads system. Now, that I take away the ads system and put it at Server 2. Server 2 can barely serve only ads system. Test First of all, I moved 75% of the ads to Server 2. And then, perform a ping to server: ping -t xxxxx. [I did the ping for 10 minutes and its following similar pattern as below] Reply from xxxxx bytes=32 time=290ms TTL=116 Reply from xxxxx bytes=32 time=289ms TTL=116 Reply from xxxxx bytes=32 time=320ms TTL=116 Reply from xxxxx bytes=32 time=286ms TTL=116 Reply from xxxxx bytes=32 time=286ms TTL=116 Reply from xxxxx bytes=32 time=348ms TTL=116 Reply from xxxxx bytes=32 time=284ms TTL=116 Then, I moved 100% of the ads to Server 2. Then, perform a ping to server again. [I did the ping for 10 minutes and its following similar pattern as below] Reply from xxxxx bytes=32 time=290ms TTL=116 Request timed out Reply from xxxxx bytes=32 time=320ms TTL=116 Reply from xxxxx bytes=32 time=286ms TTL=116 Request timed out Request timed out Reply from xxxxx bytes=32 time=284ms TTL=116 Attempts Increase MaxUserPort and TcpNumConnection Restart the server Increase IIS Max Instances and Instance MaxRequests Server Resource Only 10%-15% of the network connection is used Only 10%-15% of the CPU is used Only 25% of the memory is used

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• How can I cache a Subversion password on a server, without storing it in unencrypted form?

  - by Zilk

  My Subversion server only provides access via HTTPS; support for svn+ssh has been dropped because we wanted to avoid creating system users on that machine just for SVN access. Now I'm trying to provide a way for users to cache their passwords for a while, without leaving them stored on the filesystem in unencrypted form. This is no problem for Gnome or KDE users, because they can use gnome-keyring and kwallet, respectively. IIRC, TortoiseSVN has a similar caching mechanism, too. But what about users on a non-GUI system? Some context: in this case, we have a development/testing server where one project has been checked out into the Apache htdocs directory. Development for this project is almost complete, and only minor text/layout changes are performed directly on this server. Nevertheless, the changes should be checked into the repository. There's no kwallet and no gnome-keyring on this system, and the ssh-agent can't help because the repository is accessed via https instead of svn+ssh. As far as I know, that leaves them the choice of entering the password every time they talk to the SVN server, or storing it in an insecure way. Is there any way to get something like what gnome-keyring and kwallet provide in a non-GUI environment?

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• win8: access denied to external USB disk; update access rights fails

  - by Gerard

  I use to work with 2 laptops (vista and win7), my work being files on an external usb disk. My oldest laptop broke down, so I bought a new one. I had no option other than take win8. 1/ I suspect something changed with access rights, as my external disk suffered some "access denied" problem on win8. I was prompted (by win8) somehow to fix the access rights, which I tried to do, getting to the properties - security. This process was very slow and ended up saying "disk is not ready". Additonnally, the usb somehow was not recognized anymore. 2/ Back to win7, I was warned that my disk needed to be verified, which I did. In this process, some files were lost (most of them i could recover from the folder found00x, but I have some backup anyway). Also, I don't know why, but under win7, all the folder showed with a lock. 3/ Then back again to win8. Same problem : access denied to my disk + no way to change access rights as it gets stuck "disk is not ready". Now I am pretty sure there is some kind of bug or inconsistence in win8 / win7. I did 2/ and 3/ a few times. At some point, I also got an access denied in win7. I could restore access rigths to the disk to "system" (properties - security - EDIT for full control to group "system" ...). But then I still get the same access right pb on win8, and getting stuck in the process to restore full control to "system" -- and "admin" groups. Now, after I tried for more than 3 days, I am losing my patience with that bloody win8 which I did not want to buy but had no choice. I upgraded win8 with the windows updates available. Does not help. Anybody can help me ?

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• Send mail on event log error trigger safe check frequency

  - by Zeb Rawnsley

  I want to use powershell to alert me when an error occurs in the event viewer on my new Win2k12 Standard Server, I was thinking I could have the script execute every 10mins but don't want to put any strain on the server just for event log checking, here is the powershell script I want to use: $SystemErrors = Get-EventLog System | Where-Object { $_.EntryType -eq "Error" } If ($SystemErrors.Length -gt 0) { Send-MailMessage -To "[email protected]" -From $env:COMPUTERNAME + @company.co.nz" -Subject $env:COMPUTERNAME + " System Errors" -SmtpServer "smtp.company.co.nz" -Priority High } What is a safe frequency I can run this script at without hurting my server? Hardware: Intel Xeon E5410 @ 2.33GHz x2 32GB RAM 3x 7200RPM S-ATA 1TB (2x RAID1) Edit: With the help of Mathias R. Jessen's answer, I ended up attaching an event to the application & system log with the following script: Param( [string]$LogName ) $ComputerName = $env:COMPUTERNAME; $To = "[email protected]" $From = $ComputerName + "@company.co.nz"; $Subject = $ComputerName + " " + $LogName + " Error"; $SmtpServer = "smtp.company.co.nz"; $AppErrorEvent = Get-EventLog $LogName -Newest 1 | Where-Object { $_.EntryType -eq "Error" }; If ($AppErrorEvent.Length -eq 1) { $AppErrorEventString = $AppErrorEvent | Format-List | Out-String; Send-MailMessage -To $To -From $From -Subject $Subject -Body $AppErrorEventString -SmtpServer $SmtpServer -Priority High; };

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• WS2008 NTP - Using time.windows.com,0x9 - Time always skewed forwards

  - by David

  I have a domain controller configured to use time.windows.com (with 0x09 flags set). I've noticed that frequently the systems' clock is fast - it varies from 10 minutes to even 45 minutes. I always have to keep resetting the system date/time back to what it should be. When I run "w32tm /query /source" it tells me it's using time.windows.com, and obviously I trust Microsoft not to serve incorrect times, but why is my server's clock fast? EDIT: There are a few Time-Service events in the System log: Event ID: 142 Message: The time service has stopped advertising as a time source because the local clock is not synchronized. Event ID: 139 Message: The time service has started advertising as a time source. These two messages appear in pairs every hour or so. Event 142 appears 14 to 16 minutes after 139 appears. Going back a few months, these events appear: Event ID: 35 Message: The time service is now synchronizing the system time with the time source time.windows.com,0x9 (ntp.m|0x9|0.0.0.0:123-65.55.21.21:123). Event ID: 37 Message: The time provider NtpClient is currently receiving valid time data from time.windows.com,0x9 (ntp.m|0x9|0.0.0.0:123-65.55.21.21:123). Event ID: 47 Message: Time Provider NtpClient: No valid response has been received from manually configured peer time.windows.com,0x9 after 8 attempts to contact it. This peer will be discarded as a time source and NtpClient will attempt to discover a new peer with this DNS name. The error was: The time sample was rejected because: The peer is not synchronized, or it has been too long since the peer's last synchronization. These three events only appear once in the log, back in October.

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• Adding PHP to Apache

  - by user528451

  Where I work, we use ancient technology that belongs in a museum. Further I have to get everything done through system admins. They are telling me in order to get PHP, they will need to upgrade the operating system as well as the Apache version. lcas100[67]% uname -a Linux lcas100 2.6.9-11.ELsmp #1 SMP Fri May 20 18:26:27 EDT 2005 i686 i686 i386 GNU/Linux lcas100[68]% cat /etc/*-release LSB_VERSION="1.3" Red Hat Enterprise Linux AS release 4 (Nahant) lcas100[75]% /ots/apache/bin/httpd -v Server version: Apache/1.3.31 (Unix) Server built: Nov 3 2004 18:47:31 This doesn't make sense to me because apparently Apache 1.3.x supports PHP: http://php.net/manual/en/install.unix.apache.php Furthermore, we have another machine that runs PHP and is running the exact same OS and OS version. The reason I want it on the former machine is because it is mounted on a different file system. Lastly they tell me that all software the Apache webserver runs will need to be reinstalled/recompiled (assuming an Apache upgrade WAS needed). I am not even sure about this. Are they full of it? Thanks

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• what's the difference between a Volume and a Partition in Windows 7 diskpart

  - by user170232

  I was trying to follow the Intel guide for setting up iRST (Intel Rapid Start Technology) on my new laptop. The Intel manual says you need to create a *Volume that is as big or bigger than your available memory, set it to a specific id (id=84), then go into the iRST tool and adjust some settings. Looking at the disk manager on the laptop, I see there is already a Partition labeled as "Hibernation Partition" which is a little bigger than the memory in my system. So it looks like iRST was already set up...BUT, it's a Partition, not a Volume. Here's what the manual says to do: (from: http://download.intel.com/support/motherboards/desktop/sb/rapid_start_technology_user_guide.pdf) diskpart list disk select disk x (where x is the disk to use, there's only one disk in this laptop) create partition primary size=X000 (where X000 is the size to create) detail disk (which lists details for the disk. This is where i get hung up) select volume Z (where Z is the *partition you created previously) ** it says the 'detail disk' command will list the volume #, but it doesn't. ** 'detail disk' only lists two "volumes" for Recovery and OS. ** if i do 'list partition', i see the 8 GB *partition labeled as "Hibernation Partition") ** so I can't continue with the following steps: set id=84 override exit The reason I went looking for the manual is because when iRST is enabled in the BIOS, the system won't resume from sleep. When it's disabled, it works fine, but the system goes into (legacy?) Hibernation mode and takes a while to come out of Hibernation. the iRST is supposed to resume from deep sleep very quickly. So, what's the difference between a Volume and a Partition? Should I delete the Hibernation Partition and create a Hibernation Volume? Anyone have any ideas? (if it matters, this is on a Dell XPS 13 with BIOS A08) Thanks! J

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• Ubuntu in VirtualBox File Modified Time in Future and PHP slow file operations

  - by user1750

  For some reason, some of my files have a last modified date in the future. In addition to this, file operations in PHP are SUPER slow. For example, rebuilding the Symfony2 cache can take over 40 seconds (its takes 1-2 on my MacBook Pro). Notice the time for ListingsCRUDController.php. It just says "2012". In order see the date more clearly I ran ls --time-style="full-iso" -l For some reason it shows that this file's last modified date is ~5 hours into the future. System time: To make things more confusing, the system will intermittently speed up. Suddenly, my app will start serving requests in 1-2 seconds (down from 40 seconds) for no apparent reason. I mean I don't do anything to my code/system config - it just changes. Also, during a slow PHP request, the php5-fpm process (nginx) uses 100% of the CPU for the duration of the request. This is the second VM this has happened on and I need to know why its doing this. It has become unusable. Information About My Setup VirtualBox 4.2.0 Host: Macbook Pro Guest: Ubuntu Server 12.04 Package dkms is installed Timezones match for Ubuntu and PHP. Things I've Tried Both Apache and Nginx. APC enabled and disabled. Xdebug enabled and disabled. 1 processor up to 4 processors. 1gb memory up to 4gb memory. I've installed Ubuntu using the regular kernel and the VM kernel.

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• 550 Forged HELO with postfix on debian lenny

  - by Martin Ahrer

  I'm running postfix on a debian lenny system. sending mail in general works without any problems. however some recipent mail systems return an error and I can't get a clue what is causing the problem. So far I suspect that this is either postfix setup itself or the reverse dns resolution. The mail server is running on a virtual server from my service provider. running the command hostname is returning my.domain however running host <ip-address> is returning some alias from the virtual server system. now i'm not quite sure if that is causing my problem???? The mail system <recipient-mail>: host mx0.recipient.domain[xxx.xxx.xxx.xxx] refused to talk to me: 550 Forged HELO: you are not my.domain Reporting-MTA: dns; my.domain X-Postfix-Queue-ID: 6A1135B08002 X-Postfix-Sender: rfc822; [email protected] Arrival-Date: Tue, 13 Apr 2010 17:50:36 +0200 (CEST) Final-Recipient: rfc822; recipient-mail Action: failed Status: 5.0.0 Remote-MTA: dns; mx0.recipient.domain Diagnostic-Code: smtp; 550 Forged HELO: you are not my.domain

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• Backup, Migrate or Clone Failing CentOS 4 (LVM)

  - by Hegelworm

  Hello there, I've been running a BlueQuartz CentOS 4 system (Nuonce.net distro) for a few years now and although the hard drive (Deskstar) has always been a bit noisy, on a few recent occasions I've heard it having trouble spinning up. Basically, I want to clone this drive to a similar sized one (80 Gig). I've spent many hours reading upon dd, dd_rescue, rsync, clonezilla and LVM mirroring yet the sheer number of options and nightmarish accounts has left me frozen - unable to make an informed decision as to how to start. I've made a few attempts. dd failed after about 2 hours, as, although the drives appeared to be identical on the surface (ATA Seagate Barracudas, Thai not Chinese), the destination drive is slightly smaller. My most recent attempt involved using a Debian CD to format the new drive and then rsync-ing everything over and editing the new drive's grub and fstab to reflect the changes. No joy here either as I hadn't chosen LVM when partitioning the destination drive and it wouldn't boot. As you can probably tell, I'm out of my depth here and a panic-invoking mixture of caution and frustration has prompted me to sign up here. The server itself, although not strictly a production environment, has a very specific installation of Festival, LAME and ffMpeg and provides the back-end for a Text-to-Speech jQuery plugin that I've built over the last 2 years. I'm also planning to rebuild the whole TTS system on Debian as the existing CentOS system still has PHP4 etc. For now though, I'd really like to just shift everything over to a new drive. As this is my first post, please feel free to lay any house rules on me that I might've overlooked; I've been hovering around StackOverflow for a while now but have only just signed up. Many thanks.

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• How install ImageMagic 6.6.2 on Ubuntu 10.04 (lucid)

  - by Svyatoslavik

  How install ImageMagic 6.6.2 on Ubuntu 10.04 (lucid) Problem that lucid have old ImageMagic version(6.5.2) Its very important because me need work with SVG grafics, In my local pc I have ubuntu 11.04 and ImageMagic 6.6.2 and all work fine, In server I have 6.5... and I have problem. Reinstall ubuntu to 11.* this is no solution. I tried change /etc/apt/source.list from ubuntu 10.04 (lucid) to list from ubuntu 11.04 (natty) and update ImageMagic. After this action I have ImageMagic 6.6.2 (I looked phpinfo()) but ImageMagick is not work now. If I try do any action I get error: [error] 8996#0: *19983 FastCGI sent in stderr: "PHP Fatal error: Uncaught exception 'ImagickException' with message 'no decode delegate for this image format `/tmp/magick-XXnYKWKC' @ error/constitute.c/ReadImage/532' How it fix? Or how return to old version imagemagick? Problem if I try install from sources: /tmp/image/ImageMagick-6.7.2-7# ./configure configuring ImageMagick 6.7.2-7 checking build system type... i686-pc-linux-gnu checking host system type... i686-pc-linux-gnu checking target system type... i686-pc-linux-gnu checking whether build environment is sane... yes checking for a BSD-compatible install... /usr/bin/install -c checking for a thread-safe mkdir -p... /bin/mkdir -p checking for gawk... no checking for mawk... mawk checking whether make sets $(MAKE)... yes checking for style of include used by make... GNU checking for gcc... gcc checking whether the C compiler works... no configure: error: in `/tmp/image/ImageMagick-6.7.2-7': configure: error: C compiler cannot create executables See `config.log' for more details /tmp/image/ImageMagick-6.7.2-7#

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• Gentoo Linux useful utilities

  - by Alakdae

  I want to make a list of utilities that come in handy in Gentoo (general Linux tools available in all distributions also appreciated). What tools and commands do you use and consider helpful in administration of a Gentoo server? I will update the list with command from answers from time to time. eclean Utility for cleaning distfiles and binary packages. Usage example: eclean distfiles Usage example output: Cleans out the files in /usr/portage/distfiles. Pretty handy. Package: app-portage/gentoolkit eix Very useful tool for getting information about a package. Similar to "emerge -s" but much faster and more precise. Usage example: eix gentoolkit Usage example output: Show information about package such as: available versions, masked versions, installed versions and description. Package: app-portage/eix eix-test-obsolete Check system for obsolete, redundant, uninstalled entries in package.keywords, package.mask, package.unmask, package.use and package.cflags Usage example: eix-test-obsolete Usage example output: Shows non-matching entries, redundant entries, and uninstalled entries. Package: app-portage/eix equery Another very useful tool for getting information about packages (listing package files, checking which files belong to which package and much more) Usage example: equery b emerge Usage example output: Show which packages installed a file called emerge Package: app-portage/gentoolkit genlop Utility for extracting information about emerged ebuilds Usage example: genlop -l --date yesterday Usage example output: Show a list of packages that have been emerged yesterdayPackage: app-portage/genlop glsa-check Checks system if it's affected by GLSAs (security issues) Usage example: glsa-check -l affected Usage example output: List of GLSA that the system is affected by. Package: app-portage/gentoolkit rc-update Utility for managing (adding, deleting) runlevel scripts. Usage example: rc-update add syslog-ng default Usage example output: Adds syslog-ng to default runlevel. Package: sys-apps/baselayout revdep-rebuild Scans libraries and binaries for missing shared library dependencies Usage example: revdep-rebuild Usage example output: Gather binaries and libraries information, check for dependencies, rebuild packages with missing dependencies Package: app-portage/gentoolkit

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• Linux udev persistent net rule

  - by Anonymous

  I have a Linux system (Slackware Linux 13.0) with two network interfaces. Let's call them NIC0 and NIC1 My goal is to make NIC0 to appear as eth0 in the system. I know this can be achieved via udev rules that map network aliases to MAC addresses of network interfaces. In Slackware Linux the file /etc/udev/rules.d/70-persistent-net.rules contains such rules. The trickiest part of my problem is that I need to fake the MAC address of NIC0. I know I can dynamically change the MAC addres of a network interface with the command: ifconfig eth0 hw ether <new MAC address> Do you see the problem? This supposes that the network interfaces are already set up. So my question is: If I would have an udev rule for NIC1(the one that shall go up as eth1, with its original MAC address), would it be enough for the system to bring the other network interface (NIC0) as eth0 by default? This way I could change its MAC address later, after the udev machinery completes and the network aliases are brought up.

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• NTFS: Deny all permissions for all files, except where explicitly added

  - by Simon

  I'm running a sandboxed application as a local user. I now want to deny almost all file system permissions for this user to secure the system, except for a few working folders and some system DLLs (I'll call this set of files & directories X below). The sandbox user is not in any group. So it shouldn't have any permissions, right? Wrong, because all "Authenticated Users" are a member of the local "Users" group, and that group has access to almost everything. I thought about recursively adding deny ACL-entries to all files and directories and remove them manually from X. But this seems excessive. I also thought about removing "Authenticated Users" from the "Users" group. But I'm afraid of unintended side-effects. It's likely that other things rely on this. Is this correct? Are there better ways to do this? How would you limit the filesystem permissions of a (very) non-trustworthy account?

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• how to uninstall ubuntu 8 from ubuntu 10 dual boot

  - by umar

  I have ubuntu 8.04 and ubuntu 10.04 on my laptop, and i want to reclaim all the ubuntu 8 space so that i have just one operating system on my laptop. how can i do it? the output of sudo fdisk -l is as follows: sudo fdisk -l Disk /dev/sda: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x31a431a3 Device Boot Start End Blocks Id System /dev/sda1 * 1 4959 39833136 83 Linux /dev/sda2 4960 5233 2200905 82 Linux swap / Solaris /dev/sda3 5234 12852 61192552 83 Linux /dev/sda4 12852 19458 53062657 5 Extended /dev/sda5 12852 19182 50847744 83 Linux /dev/sda6 19182 19458 2213888 82 Linux swap / Solaris i dont know which of sda1, ..., sda 6 etc ubuntu 8 is on. how can i find that out? The actual task is that i think a lot of space is devoted to ubuntu 8, if there is no easy way to get rid of it, then i want to repartition the disk so that about 50 GB of hard disk space is given to ubuntu 10's home folder from the ubuntu 8's home folder. but i hope that there is an easy way to get rid of ubuntu 8 alrogether and just have ubuntu 10 on my system.

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• How can I use the Homebrew Python with Homebrew MacVim on Mountain Lion?

  - by Stephen Jennings

  I originally asked and answered this question: How can I use the Homebrew Python version with Homebrew MacVim? These instructions worked on Snow Leopard using Xcode 4.0.1 and associated developer tools. However, they no longer seem to work on Mountain Lion with Xcode 4.4.1. My goal is to leave the system's version of Python completely untouched, and to only install PyPI packages into Homebrew's site-packages directory. I want to use the vim_bridge package in MacVim, so I need to compile MacVim against the Homebrew version of Python. I've edited the MacVim formula to add these to the arguments: --enable-pythoninterp=dynamic --with-python-config-dir=/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/Current/lib/python2.7/config Then I install with the command: brew install macvim --override-system-vim --custom-icons --with-cscope --with-lua However, it still seems to be somehow using Python 2.7.2 from the system. This seems strange to me because it also seems to be using the correct executable. :python print(sys.version) 2.7.2 (default, Jun 20 2012, 16:23:33) [GCC 4.2.1 Compatible Apple Clang 4.0 (tags/Apple/clang-418.0.60)] :python print(sys.executable) /usr/local/bin/python $ /usr/local/bin/python --version Python 2.7.3 $ /usr/local/bin/python -c "import sys; print(sys.version)" 2.7.3 (default, Aug 12 2012, 21:17:22) [GCC 4.2.1 Compatible Apple Clang 4.0 ((tags/Apple/clang-421.0.60))] $ readlink /usr/local/lib/python2.7/config /usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/Current/lib/python2.7/config I've removed everything in /usr/local and reinstalled Homebrew by running these commands: $ ruby <(curl -fsSkL raw.github.com/mxcl/homebrew/go) $ brew install git mercurial python ruby $ brew install macvim (nope, still broken) $ brew remove macvim $ ln -s /usr/local/Cellar/python/..../python2.7/config /usr/local/lib/python2.7/config $ brew install macvim

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