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• Determine which version of linux/unix/darwin I have

  - by John

  I have root ssh/terminal access to a linux server. How do I determine which version of centos I have? Some people suggested I run the command cat /etc/redhat-release but I got an error saying file not found. In fact, i'm not entirely sure i'm even using CentOS. That's what some suggested it might be. Here's a list of commands I tried that gave me no file or directory error: cat /etc/*release* cat /etc/*version* cat /proc/*version* cat /proc/*release* Here's a list of linux commands that do not exist: lsb_release: command not found wget: command not found yum: command not found

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• Execute Bash script on Ubuntu from remote Windows machine?

  - by John Isaacks

  I have a bash script on a ubuntu 10.4 machine. It is shared and I can access it from my win7 machine with \\LINUX-SERVER\bash_repo\make-live However when I do, windows tries to open it. This is not what I want. I want to tell ubuntu to execute it. I am actually hoping to be able to build a GUI app on windows where the user clicks a button and it tells the bash script on the ubuntu machine to execute. Is any of this possible?

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• Do I use the FV function in Excel correctly?

  - by John

  My task: Create a table: Calculate what the revenues of e-trading will be after five years at 15 percent interest rate if we now have 15 000 EUR. Use the FV function from the Financial Group in Excel. My resolution: =FV( 15%; 5; 0; -15000). My question: Is it correct? I know the task lacks information whether the interest rate is per month or per year. I calculate it as 'per year'. My question is orientated more on the usage of the FV function. I, for example, do not understand why '-15000' and not '15000'. Also why the third parameter has to be 0? Maybe I do it wrong. Please help me solve it! Thanks in advance.

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• xen hotplug can't add vif to eth0: operation not supported

  - by John Tate

  I am new to xen and I am trying to get a domU running but I am having problems with it. I think my network card might not support bridging which is bizarre. This is the error I get when trying to create the domU [root@hyrba ~]# xm create sardis.secusrvr.com.cfg Using config file "/etc/xen/sardis.secusrvr.com.cfg". Error: Device 0 (vif) could not be connected. Hotplug scripts not working. All the xen kernel modules are loaded... xen_pciback 52948 0 xen_gntalloc 6807 0 xen_acpi_processor 5390 1 xen_netback 27155 0 [permanent] xen_blkback 21827 0 [permanent] xen_gntdev 10849 1 xen_evtchn 5215 1 xenfs 3326 1 xen_privcmd 4854 16 xenfs I get this error in /var/log/xen/xen-hotplug.log RTNETLINK answers: Operation not supported can't add vif2.0 to bridge eth0: Operation not supported can't add vif2.0-emu to bridge eth0: Operation not supported

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• How to extract attachments from Exchange 2003 database

  - by John

  I have an ancient Exchange 2003 server that I'm getting ready to retire. All user accounts have been migrated to Google Apps for Business, so no new mail is being sent or received on the server. There are less than 50 accounts on the server, but some are very large so that the whole Exchange database is between 10 and 20 GB. The largest account has over 100,000 messages. I believe that in the migration to Gmail, some attachments were not migrated. For peace of mind, I'd like to get the attachments out of the Exchange database. The only way I know of to do this is to set up a 2nd computer with Outlook on it, set up one of the accounts, and then sync the whole mail history and get the attachments out that way. Is there something simpler that I can do? Here are two possibilities: An Exchange attachment retrieval tool/script that pulls attachments for all accounts directly out of the Exchange database. An Exchange PST exporter tool/script that will export PST files for all accounts so that I can just load the PST files into Outlook at will.

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• apache automatically completes url

  - by John

  See this NYTimes url: http://opinionator.blogs.nytimes.com/2011/01/02/war-in-the-cabinet/?hp If we type opinionator.blogs.nytimes.com/2011/01/02/war-i in browser, it automatically redirects us to the above article, the only article in that folder starting with "war-i". How to do this in a site with apache, which serves static html files only? That is, if there is a apache module, without adding scripts, that would be best.

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• Latest XP Drivers for Intel Integrated Graphics

  - by John

  On the Intel site I'm struggling to find what the latest driver version is for certain chipsets. From a system info tool I have several PCs (laptops) with the following reported graphics: Mobile Intel(R) 4 Series Express Chipset Family Intel(R) Q35 Express Chipset Family Intel(R) Q45/Q43 Express Chipset All use the same driver igxprd32.dll at version 6.14.0010.4xxx (last 3 digits vary). All PCs are XP 32 bit. I am not certain but I think these are all using the same basic chipset. More than likely the drivers were never updated so I wondered what version might be relevant. Any help on tracking down the latest driver version (I just need the number, so I can see how out of date they are) and figuring out which chips these cards are would be great.

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• poorman's redandunt domain name server array

  - by John

  Can I configure my domain, example.com's name servers as: ns1.dyndns.com ns2.dyndns.com ns1.opendns.com ns2.opendns.com That is, combining free dns services to create a redundant name server array? Note these name servers from different companies are not aware other companies' name servers also serve our domain. In case one company, say, ns1(2).dyndns.com is down, will people experience interruption when visiting my example.com? If one name server is unreachable, the next name server will be tried, or?

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• Copying files to my laptop makes them locked

  - by John

  When I save files from e.g. remote desktop or from an email (outlook) attachments, or from skype even to my local machine they show a locked Icon on the file. Then e.g. SQL Server doesn't let me restore backups as it says the operating system doesn't have access to the file. I've had success fixing this by setting the ownership of the parent folder to my user and then let it apply to sub folders. Also sometimes I need to click - Proerties - Security - Advanced - Change Permmissions, then check "change child permissions..." and apply on the parent dir. I'm using Windows 7 64 bit Proffessional, on HP Probook 4530, and I have a administrator user. This is a real pain to do everytime. I suspect it might be because of HP software that came with the laptop, I think there is drive encryption as part of the protect tools. Although I'm hoping there's something in windows i can set to change the behaviour to not lock these files.

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• Is there a way to do a sector level copy/clone from one hard drive to another?

  - by irrational John

  Without going into distracting details, I'm attempting to duplicate the contents of the 500GB drive in my MacBook to another 500GB drive. But this is turning out to be an unexpected hassle because the drive contains both the OS X partition and an NTFS partition with Win 7 via Apple's Boot Camp. With the exception of Clonezilla, the tools I have looked at so far all have some limitation. The Mac tools don't want to deal with the NTFS partition. The Windows tools are totally clueless about either the HFS+ partition and/or the hybrid MBR/GPT Boot Camp partitioning. Clonezilla looked like it would do what I want but apparently I can't figure out how to use it. After doing what I thought was a sector to sector copy I found that only the NTFS partition had been migrated. The others were apparently empty. (And frankly, I'm not positive Clonezilla migrated the partition table correctly either). Note: It takes over 2 hours using SATA to read/write all sectors with these drives. So I'm not up for using trial & error to narrow in on the right combination of Clonezilla options to use. I'm beginning to think that maybe the answer is to boot Linux (probably Ubuntu) and then use some ancient BSD command. Trouble is I don't know what command (or parameters to use) in order to do a sector level copy from one drive to another. As far as I know the drives have the same number of sectors so this should be trivial. Sigh.

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• How to change ftp path?

  - by John Isaacks

  I have apache installed on my ubuntu machine. you can access the server from other machines with http://linux-server The local path on the machine is /var/www I have installed vsftpd on the machine as well so I can ftp to the server from another machine with ftp://linux-server however it takes me to /home/myUserName I want the ftp to take me to the same place as the http. So how can I change the FTP path? Thanks!

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• Microsoft Wireless Keyboard 3000 v2.0 not working, but paired Wireless Mouse 5000 on same receiver does?

  - by John Straka

  I have a Microsoft Wireless Keyboard 3000 v2.0 that was bought paired with a Microsoft Wireless Mouse 5000. They're both Bluetooth and use the same receiver. The keyboard no longer works. The receiver is fine, as the mouse still works. The keyboard is still detected by Windows when the receiver is plugged in. The batteries have been replaced. There are no on/off switches on the keyboard or mouse, and no re-sync button on them or the receiver. Results are the same when using the receiver in a different USB port, or on a different machine. Anything else I might try to fix this, or should I hold a funeral for the keyboard?

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• Could SQL Server 2008 replication be used with NLB to allow unlimited scaling of reporting servers?

  - by John Keranos

  We are currently using transactional replication in SQL Server 2008 to keep a secondary reporting server synchronized with a primary database server. This has been working weel and keeps some of the load off the primary server. Would it be possible to scale this solution to multiple reporting servers? We're expecting an increased load of read-only queries and it would be nice to be able to add reporting servers as needed. The general idea was the following: Each reporting server would use a "pull" subscription to get the data from the primary database publication. These reporting databases could be a couple of minutes behind the primary server without it being an issue. The reporting servers would be NLB'd together. All read-only queries would be directed to the NLB which should spread the load across the servers.

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• Computer slow after installing 32GB RAM

  - by John Gilmore

  I'm currently running very large network simulations for my PhD research, for which I need lots of RAM. I have a Core i7 2600K processor with a Gigabyte GA-Z68AP-D3 motherboard, running Windows 7 professional 64bit. I bought the system with 8GB (2x4GB) DDR3 1600 MHz Corsair Vengeance RAM and the system ran like a dream. I'm planning to upscale my simulations so I removed the 2x4GB RAM and installed 4x8GB DDR 1600 MHz Corsair Vengeance RAM. When I rebooted the system, boot time was much longer than usual (10 mins just to get to login screen). After logging in, the whole system was unresponsive. I tried playing some games (Bioshock 2), but it was unplayable. I've not had this problem before and I have an ATI Radeon HD 5850 graphics card, so that's not the problem. The only thing that's changed is the RAM. I've looked through the specifications of Windows, my motherboard and my CPU and they all state that 32GB of RAM is supported. Does anyone have an idea of what's going on? Any help would be greatly appreciated.

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• Free Hosting control panel

  - by John Maxim

  Hello All, I'm in the mid of researching for one of the best hosting control panels. The server I run is Ubuntu and I have some experience with ISPConfig 2 & 3. Since I haven't explored any others available, what are the recommended ones for an Ubuntu server? I asked because I find that there seems to be some disabling and modifications required for an Ubuntu server if I need to use ispconfig which causes the server to change its actual way of running. It's quite good though, but any more recommended ones ? Something more organic? which doesn't require much breaking and changing. I'm not asking for the simple one, I don't mind going extra mile to install a powerful one but just try sticking with most Ubuntu's conventions will be an ideal one for me. And of course, if there happens to be something that meets the requirement as mentioned "Ubuntu conventions" and also simple to install at the same time, that'd be a bonus. Thanks in advance.

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• Apache httpd.conf handle multiple domains to run the same application

  - by John Stewart

  So what we are looking for is the ability to do the following: We have an application that can load certain settings based on the domain that it is being accessed from. So if you come from xyz.com we show a different logo and if you come from abc.com we show a different logo. The code is the same, running from same server just detects the domain on the run Now we want to get a dedicated server (any suggestions?) that will enable us to point all the doamins that we want to this server (we change the DNS for the domains to that of our server) and then when the user goes to a certain domain they run the same application. Now as far as I can understand we will need to create a "VirtualHost" in apache to handle this. Can we create a wildcard virtualhost that catches all the domains? I am not an expert with Apache at all. So please forgive if this comes out to be a silly question. Any detailed help would be great. Thanks

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• Different configurations for ssh client depending on ip address or hostname

  - by John Smith Optional

  I have this in my ~/.ssh/config directory: Host 12.34.56.78 IdentityFile ~/.ssh/my_identity_file When I ssh to 12.34.56.78, everything works fine. I'm asked for the passphrase for "my_identity_file" and I can connect to the server. However, sometimes I'd also like to ssh to another server. But whatever the server, if I do: ssh [email protected] I'm also asked for the passphrase for "my_identity_file" (even though the server has a different ip address). This is very annoying because I don't have the public key for this file set up on all my servers. I'd like to connect to this other server (an old shared hosting account) with a password, and now I cant. How do I manage to use the key authentication only with one server, and keep using password by default for servers that aren't listed in my ~/.ssh/config ? Thanks for your help.

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• How does Heartbeat determine when to switch to the secondary? Can you force it to switch?

  - by John

  I've been trying to understand exactly how Heartbeat works - I understand how when one server dies, it switches to the backup. But, for me, it also switches when the primary has a large increase in workload. But, it doesn't always switch at the same value. There doesn't seem to much information on the web about how it works. The best I've found is this article. How does Heartbeat determine when to switch to the secondary, and how does it determine when it switch back to the primary? Is this an editable setting, and can I force it to switch between one and the other? Sometimes when Heartbeat will switch to the secondary, it takes a few days or I've even seen two weeks before it switches back to the primary. This is well after the primary traffic has gone down. I'm currently using BlueOnyx, and my Heartbeat settings are: Auto Failback: on Keepalive: 1 seconds Warntime: 10 seconds Deadtime: 20 seconds Initdead: 30 seconds

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• apache chokes after 300 connections

  - by john titus

  We have an apache webserver in front of Tomcat hosted on EC2, instance type is extra large with 34GB memory. Our application deals with lot of external webservices and we have a very lousy external webservice which takes almost 300 seconds to respond to requests during peak hours. During peak hours the server chokes at just about 300 httpd processes. ps -ef | grep httpd | wc -l =300 I have googled and found numerous suggestions but nothing seems to work.. following are some configuration i have done which are directly taken from online resources. I have increased the limits of max connection and max clients in both apache and tomcat. here are the configuration details: //apache <IfModule prefork.c> StartServers 100 MinSpareServers 10 MaxSpareServers 10 ServerLimit 50000 MaxClients 50000 MaxRequestsPerChild 2000 </IfModule> //tomcat <Connector port="8080" protocol="org.apache.coyote.http11.Http11NioProtocol" connectionTimeout="600000" redirectPort="8443" enableLookups="false" maxThreads="1500" compressableMimeType="text/html,text/xml,text/plain,text/css,application/x-javascript,text/vnd.wap.wml,text/vnd.wap.wmlscript,application/xhtml+xml,application/xml-dtd,application/xslt+xml" compression="on"/> //Sysctl.conf net.ipv4.tcp_tw_reuse=1 net.ipv4.tcp_tw_recycle=1 fs.file-max = 5049800 vm.min_free_kbytes = 204800 vm.page-cluster = 20 vm.swappiness = 90 net.ipv4.tcp_rfc1337=1 net.ipv4.tcp_max_orphans = 65536 net.ipv4.ip_local_port_range = 5000 65000 net.core.somaxconn = 1024 I have been trying numerous suggestions but in vain.. how to fix this? I'm sure m2xlarge server should serve more requests than 300, probably i might be going wrong with my configuration.. The server chokes only during peak hours and when there are 300 concurrent requests waiting for the [300 second delayed] webservice to respond. Please help..

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• Uninstalled server 2008 now router won't handle DHCP

  - by john

  My set up is this. server behind router, router has a server and switch connected to it with multiple computers. router used to serve DHCP and DNS, a couple of days ago installed AD, DNS and DHCP on the server, and the server gave out IP's. For various reasons we had to uninstall the domain on our server. I removed AD, DHCP and DNS from the roles and set the router back to serving DHCP and DNS. Now I can't get computers on the network. I reset my router back to factory defaults, and if I plug a computer directly into the router I can get a IP address, but all the computers behind the switch can't get an IP address and can't see the router. All my computers say unidentified network, and if I ping the router it says host is unreachable. On the other hand, my wireless devices are just fine and connect no problem. But for desktops, ipconfig /release doesn't release anything and /renew can't find a server to renew on. My router log shows several FIN scans but they are from innocuous websites (google, netgear) and it shows a couple of smurf attacks but they are all from my external IP. Any ideas? the server isn't even connected to the route right now, and all the computers are set for dynamic IP addresses.. I don't know what else to try? Any help?

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• Scripted redirection for Outlook 2003

  - by John Gardeniers

  We have a staff member in sales who has gone onto a 4 day week (getting ready for retirement), so each Thursday afternoon her email needs to be forwarded to another user and each Friday afternoon it needs to be set back. I'm using the VBS script below to do this, run via the Task Scheduler. Although the script appears to do it's job, based on what I see when I view the user's Exchange settings, Exchange doesn't always recognise that the setting has changed. e.g. Last Thursday the forwarding was a enabled and worked correctly. On Friday the script did it's thing to clear the forwarding but Exchange continued to forward messages all weekend. I found that I can force Exchange to honour the changed setting be merely opening and closing the user's properties in ADUC. Of course I don't want to have to do that. Is there a non-manual way I can have Exchange read and honour the setting? The script (VBS): ' Call this script with the following parameters: ' ' SrcUser - The logon ID of the suer who's account is to be modified ' DstUser - The logon account of the person to who mail is to be forwarded ' Use "reset" to clear the email forwarding SrcUser = WScript.Arguments.Item(0) DstUser = WScript.Arguments.Item(1) SourceUser = SearchDistinguishedName(SrcUser) 'The user login name Set objUser = GetObject("LDAP://" & SourceUser) If DstUser = "reset" then objUser.PutEx 1, "altRecipient", "" Else ForwardTo = SearchDistinguishedName(DstUser)' The contact common name objUser.Put "AltRecipient", ForwardTo End If objUser.SetInfo Public Function SearchDistinguishedName(ByVal vSAN) Dim oRootDSE, oConnection, oCommand, oRecordSet Set oRootDSE = GetObject("LDAP://rootDSE") Set oConnection = CreateObject("ADODB.Connection") oConnection.Open "Provider=ADsDSOObject;" Set oCommand = CreateObject("ADODB.Command") oCommand.ActiveConnection = oConnection oCommand.CommandText = "<LDAP://" & oRootDSE.get("defaultNamingContext") & ">;(&(objectCategory=User)(samAccountName=" & vSAN & "));distinguishedName;subtree" Set oRecordSet = oCommand.Execute On Error Resume Next SearchDistinguishedName = oRecordSet.Fields("DistinguishedName") On Error GoTo 0 oConnection.Close Set oRecordSet = Nothing Set oCommand = Nothing Set oConnection = Nothing Set oRootDSE = Nothing End Function

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• Can ECC Chipkill be used in non-IBM servers?

  - by John Davies

  Can IBM specific ram, such as 41Y2770 with ECC Chipkill, be used in non-IBM servers?

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• Can anyone recommend a good BSS/OSS platform for a voip provider?

  - by john unkas

  We are a voip startup and want to launch a voip service, while we have the call control platform (broadworks) we are wondering what BSS/OSS platform to use. Our options are to buy a turnkey solution (if it exists) or else to glue together opensource and commerical offerings to create a complete solution. BSS components we're looking for are identity management, billing, rating, product catalogue, subscription management, reporting, etc..

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• Safari Private Browsing and gmail

  - by John Smith

  I have two gmail accounts. If I follow the following steps then Safari will not let me log in to any other gmail account Go the gmail, log in as user1 Enable Private browsing Go to one website Disable Private browsing Go to gmail and logout. At this point gmail will not let me switch to user2. I have to quit the whole browser before I get that option. Is there a way to fix this? I am not trying to open two gmail accounts at the same time. Just one after the other. As long as I do not enter Private Browsing mode between the two logins I can switch between account1 and account2. Also, I am not changing browser to Firefox

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• How to reformat reStructuredText?

  - by wal-o-mat

  I'm writing reST in vim, which handles line breaks for me (after 80 chars). However, since I frequently go back and edit the text before, lines get ugly again. For example, in tables, it's sometimes annoying to re-format a complete table just because you need a line break in some place. So I wish I had a program that reads my ugly-but-correct reStructuredText and outputs it nicely formatted and wrapped. I found that pandoc in.rst -w rst mostly works, but it has some drawbacks. For example :author: John Doe becomes author John Doe and title formatting is changed as well. Sadly, there seems to be no rst2rst or something similar. Does anyone have some advice?

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