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• Problems executing check_mysql plugin

  - by Brian

  I'm attempting to test out the check_mysql plugin for Nagios using the command line. It works great when I'm just checking localhost but when I try to specify a different server (using the -H argument) I keep getting the following error message: CRITICAL - Unable to connect to mysql://nagios_user@{remoteServerHostname}/ - Access denied for user 'nagios_user'@'{localServerHostName}' (using password: YES) It looks like it's trying to connect to the database using the localhost server even though I've specified a different host name. I've already set up this user on the remote database and they have correct permissions. I'm just trying to figure out why the script keeps inserting the localhost server name instead of the remote one.

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• I need to access another user's files.

  - by CDeanMartin

  My system is an HP netbook running Ubuntu 10 netbook edition from a USB drive. I created an admin account and user account, and left in place the 'ubuntu' account. My netbook came with Windows 7 factory loaded and I did some work in Windows before setting up Linux. I copied my work into the HP Tools FAT32 partition that also came Factory Loaded, and was only 20% full. Only the 'ubuntu' account shows the HP Tools partition. So I would like to either view the partition from the 'admin' or 'user' accounts, or copy files from the partition-to a folder accessible from admin or user. I have already tried right clicking the folder, selecting share, and installing the share package, but I got a string of errors and would prefer a short term, one time solution that does not involve installing the share package. All I need is a few plain text Windows files i was working on.

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• how can I see a page's referrer in Chrome?

  - by EmmyS

  I've read the "answers" on this question, which is pretty much what I'm asking, but no one actually provides an answer. Nowhere in the Developer Tools (that I can see, anyway) is there a clear indicator of the current page's referring page. This is something that's really easy to find in Firefox; just right-click and choose Page Info. Where is this functionality in Chrome? If it's in the developer tools, which tab is it under? If it's not, is there an extension I can use to get this info? I've tried the Web Developer extension, and can't seem to find this very basic piece of info there, either.

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• What does advantages of WIM image that file based vs. ISO or another sector based images in Administrator

  - by saber tabatabaee yazdi

  answers of this question is very important to administrators to choose between Microsoft solution or other 3rd Party Tools. WIM solution is file based and others are sector by sector images like Acronis or other backup and clone tools like Norton Ghost or Cloning in vmware ESXi and etc. My question about the advantages of WIM to edit or deploy in Enterprise? to get agreements of managers to choose between these alternative decisions. Are we had any Key Performance Indicators in Change management? Are there any statistics about compares of these solutions? What Time is spend in any solotion to get image or change images or revert and apply images? Is it possible to change and modify images that made in All of these solutions as easy as in WIM file?

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• Amazon ELB and use of address / server names across multiple servers

  - by Stpn

  I am setting up Nginx servers behind the ELB. I set up so that api.app.com points to an ELB. I wonder which addresses I should use for remote connections, Nginx settings etc.. 1) For example, in Nginx: Should I do server { listen 80; #What is the right line here: # server_name <WWW.NAME.COM> OR <ec2-.....compute-1.amazonaws.com> OR <MLB-....amazonaws.com>?; passenger_enabled on; ..... } 2) I connect servers behind ELB to remote Postgres database. In Postgres settings should I open the ELB address (MLB-...amazonws.com) or to individual EC2 IPs?

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• Secure, efficient, version-preserving, filename-hiding backup implemented in this way?

  - by barrycarter

  I tried writing a "perfect" backup program (below), but ran into problems (also below). Is there an efficient/working version of this?: Assumptions: you're backing up from 'local', which you own and has limited disk space to 'remote', which has infinite disk space and belongs to someone else, so you need encryption. Network bandwidth is finite. 'local' keeps a db of backed-up files w/ this data for each file: filename, including full path file's last modified time (mtime) sha1sum of file's unencrypted contents sha1sum of file's encrypted contents Given a list of files to backup (some perhaps already backed up), the program runs 'find' and gets the full path/mtime for each file (this is fairly efficient; conversely, computing the sha1sum of each file would NOT be efficient) The program discards files whose filename and mtime are in 'local' db. The program now computes the sha1sum of the (unencrypted contents of each remaining file. If the sha1sum matches one in 'local' db, we create a special entry in 'local' db that points this file/mtime to the file/mtime of the existing entry. Effectively, we're saying "we have a backup of this file's contents, but under another filename, so no need to back it up again". For each remaining file, we encrypt the file, take the sha1sum of the encrypted file's contents, rsync the file to its sha1sum. Example: if the file's encrypted sha1sum was da39a3ee5e6b4b0d3255bfef95601890afd80709, we'd rsync it to /some/path/da/39/a3/da39a3ee5e6b4b0d3255bfef95601890afd80709 on 'remote'. Once the step above succeeds, we add the file to the 'local' db. Note that we efficiently avoid computing sha1sums and encrypting unless absolutely necessary. Note: I don't specify encryption method: this would be user's choice. The problems: We must encrypt and backup 'local' db regularly. However, 'local' db grows quickly and rsync'ing encrypted files is inefficient, since a small change in 'local' db means a big change in the encrypted version of 'local' db. We create a file on 'remote' for each file on 'local', which is ugly and excessive. We query 'local' db frequently. Even w/ indexes, these queries are slow, since we're often making one query for each file. Would be nice to speed this up by batching queries or something. Probably other problems that I've now forgotten.

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• Is it possible to use WebMatrix with pure IIS?

  - by Mike Christensen

  I'd like to check out WebMatrix for publishing our site to IIS automatically (right now, I have to zip it up, copy it out, Remote Desktop into the server, unzip it, etc). However, every example I can find on how to setup WebMatrix involves Azure, or using a .publishsettings file that you'd get from your hosting provider. I'm curious if I can publish to a normal, every day IIS server running on Windows Server 2008. So far, all I've done to the IIS server is install Web Deploy, which I believe is the protocol that WebMatrix uses to publish. When I enter the Remote Site Settings screen, I select Enter settings. I select Web Deploy as the protocol, type in my NT domain credentials (I'm an Admin on that server). I put in the site URL for the Site Name and Destination URL. When I click Validate Connection, I get: Am I doing something wrong, or is this just not possible to do?

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• Icinga/Nagios to ping different machine on local network

  - by feronovak

  I have 3 machines, all remote IPs and all of them running nsclient++ with remote and local IP addresses: 46.*.*.1/192.168.1.1 46.*.*.2/192.168.1.2 46.*.*.3/192.168.1.3 I want nagios/icinga to remotely ping other local machines to see whether VLAN is working correctly. Is there a way to tell nagios/icinga to use machine 192.168.1.1 and to ping 192.168.1.2 and 192.168.1.3 ? check_ping is pinging only machine defined in host_name from icinga server. Icinga is on completely different ip range 92.*.*.* Is there a way to do this to see VLAN workes fine?

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• Creating a file server - How can I use a large VHD file in Hyper-V? (700GB)

  - by barfoon

  Hey everyone, After a few discussions (here, here, and here), I am still unable to create a simple VM that will be used as a fileserver hosted on my Hyper-V box. I have created a fixed 700GB SCSI drive (.vhd file), as I have learned an IDE drive of this size is not possible. Not to sound too cynical, but its blown me away at how much trouble its been to create a large amount of space and start using it. What is the best way to create a fileserver with a drive of this size hosted on Hyper-V Server 2008, and how can I get it going??? Inclusion of OS, driver, integration tools etc, anything you feel is required would be greatly appreciated. Extra information I am using the stand-alone version of Hyper-V server, and not Windows Server 2008. I have tried loading the Linux Integration Tools (linked in the comments of the last link above) onto a SUSE 11 VM and the installation fails, the machine cannot see the vhd at all. Thanks very much,

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• Rebasing a branch which is public

  - by Dror

  I'm failing to understand how to use git-rebase, and I consider the following example. Let's start a repository in ~/tmp/repo: $ git init Then add a file foo $ echo "hello world" > foo which is then added and committed: $ git add foo $ git commit -m "Added foo" Next, I started a remote repository. In ~/tmp/bare.git I ran $ git init --bare In order to link repo to bare.git I ran $ git remote add origin ../bare.git/ $ git push --set-upstream origin master Next, lets branch, add a file and set an upstream for the new branch b1: $ git checkout -b b1 $ echo "bar" > foo2 $ git add foo2 $ git commit -m "add foo2 in b1" $ git push --set-upstream origin b1 Now it is time to switch back to master and change something there: $ echo "change foo" > foo $ git commit -a -m "changed foo in master" $ git push At this point in master the file foo contain changed foo, while in b1 it is still hello world. Finally, I want to sync b1 with the progress made in master. $ git checkout b1 $ git fetch origin $ git rebase origin/master At this point git st returns: # On branch b1 # Your branch and 'origin/b1' have diverged, # and have 2 and 1 different commit each, respectively. # (use "git pull" to merge the remote branch into yours) # nothing to commit, working directory clean At this point the content of foo in the branch b1 is change foo as well. So what does this warning mean? I expected I should do a git push, git suggests to do git pull... According to this answer, this is more or less it, and in his comment @FrerichRaabe explicitly say that I don't need to do a pull. What's going on here? What is the danger, how should one proceed? How should the history be kept consistent? What is the interplay between the case described above and the following citation: Do not rebase commits that you have pushed to a public repository. taken from pro git book. I guess it is somehow related, and if not I would love to know why. What's the relation between the above scenario and the procedure I described in this post.

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• How to install Active Directory Users and Computers for Windows 2008

  - by Mark Arnott

  I want to install the administration tools on a Windows Server 2008 (R1) machine. On Windows 2003 you installed adminpak.msi, but I can't find such a file for 2008. Is this a "feature" in Server Manager? If so what is it named? ---UPDATE--- So I drilled into the server Features list and I have "Remote Server Administration Tools" but it only includes File Services, Print Services and Web Server. This is a member server in a domain but not a domain controller. It is Windows 2008 (original) not R2. Still, why can't it run AD users and computers from this machine?

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• Access hamachi machines from iPad / iphone [closed]

  - by Yas

  Is it possible to access a remote desktop from the iPhone or iPad on hamachi.

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• Server monitoring for medium scale UNIX network

  - by nbartolomeo

  I'm looking for suggestions for a good monitoring tools, or tools, to handle a mixed Linux (RedHat 4-5) and HPUX environment. Currently we are using Hobbit which is working reasonably well but it is becoming harder to keep track of what alerts are sent out for what servers. Features I'd like to see: Easy configuration of servers. The ability to monitor CPU, network, memory, and specific processes I've looked into Nagios but from what I have seen it won't be easy to set up the configuration for all of our servers ~200 and that without installing a plugin into each agent I won't be able to monitor processes.

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• Executing EXE with wildcard from psexec

  - by Danny

  I'm writing a few scripts that I am using to integrate with bamboo for some continuous integration improvements and I've run into a bit of a snag. I'm currently trying to run a psexec command that installs the latest build on the remote machine but I dont necessary know the revision number. For example, the remote exe file could be Installer-3.1.xxxxx.exe where the xxxxx changes. I tried running the command with Installer-3.1.*.exe but it takes it as literal in Windows. I'm not overly familiar with Windows command prompt and am more used to Linux at this moment.

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• Datacenter Backup Strategy

  - by EasyEcho

  What are common approaches to backup solutions in remote data centers? I am already familiar with general backup principals and have a very good backup strategy for our local data center but am having great difficulty extending it to a remote data center. We currently do a full backup on Friday, differential Mon - Thu, rotate offsite Friday morning ...rinse and repeat week after week. BTW, we use disks and have been very happy with this approach. We could buy a large storage server and backup everything to it, but this solution doesn't give you offsite. We could encrypt and upload to Amazon or some other online storage but that would take a large amount of time given the data and would be rather expensive paying for the bandwidth leaving the data center and receiving at amazon. We could drive to the data center every Friday and continue to rotate disks as we do now. But that just seems old fashion. What am I missing, are there better options?

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• Want to SASL/TLS authentication

  - by Naval

  I want to send mail from remote client from my server(centos 5 and 64 bit) for this i need to sasl auth but i have no idea about it what changes i have to make in my server and client here I want to make things more clear my server's hostname/Ip is = test02.s80.in/176.67.172.209 now i want to authenticat remote client vps2.smail.info and vps1.smail.info to deliver mail .. so plz help me if any systematic way to do sasl/tls authentication for these clients... i am using DNS load-balancing(round-robin) mx record lookup technique for load balancing..

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• Corrupt Windows 7, Chkdsk finds errors continuously after multiple tries

  - by mj_

  My Windows 7 instance is all corrupt on my Dell XPS laptop (my kid hibernated it as it was starting). I got the Windows 7 installation disc and I try to repair the installation. The repair goes through and it says done but it doesn't know if it repaired successfully. It just says reboot. I can also open a command line and I run chkdsk /F manually in there. What's strange is that I've run it 20 times and chkdsk claims that it fixes stuff every time. Eventually it stops and I reboot. Much to my chagrin, my machine is still broken. Chkdsk gives an error at the end that it can't write a log file. I've also run a full diagnostic using the Dell diagnostic tools. The tools say that everything is okay. Any suggestions regarding what I should do next? Any help appreciated. mj

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• TFTP PUT Failing Across Hosts

  - by Jason

  I have a TFTP server installed on a CentOS host. /etc/xinetd.d/tftp: service tftp { disable = no socket_type = dgram protocol = udp wait = yes user = root server = /usr/sbin/in.tftpd server_args = -c -s /var/lib/tftpboot per_source = 11 cps = 100 2 flags = IPv4 } If I try to PUT a file from a remote host to the host running the TFTP server, I get Transfer Timed Out - however, it does create the file in /var/lib/tftpboot but the file is empty. If I tftp from the tftp server to itself (localhost) and PUT a file, it works fine. I have verified that SELinux is disabled and IPTables are turned off. I can connect from the remote hosts with no issue - just seems to be the PUT I have issue with: [root@SVR01 TEST]# tftp 10.100.2.15 tftp> status Connected to 10.100.2.15. Mode: netascii Verbose: off Tracing: off Literal: off Rexmt-interval: 5 seconds, Max-timeout: 25 seconds tftp>

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• Windows Server 2008 R2 loses ability to connect to network share

  - by JamesB

  I could sure use some help with this one: I've got two Windows Server 2008 R2 x64 Terminal Servers, as well as several 2003 servers (DNS / Wins / AD / DC). On the two 2008 boxes, every now and then they will get in this mode where you can't map a drive to a random server. I say random server because it's not always the same server that you can't map to. Here is a summary of what I can and can't do: net view \\servername Sometimes this works, sometimes it does not. net view \\FQDN This always works. net view \\IPAddress This always works. ping servername Sometimes this works, sometimes it does not. ping FQDN This always works. ping IPAddress This always works. I've been looking all over for a solution to this. It sure seems like Microsoft would have a hotfix by now. The kicker to this is that it sometimes works great, especially after a reboot. It may run for 2 weeks just fine, but all of a sudden it will fail to resolve the remote server name. It will then be this way for a few days, then it might start working again. Also, while it's in the mode of not working, the other servers have no problem getting there. It's just these 2008 R2 Terminal Servers. Setting a static entry in the Hosts file and LMHosts does not make it work. All servers have static IPs and they are registered in DNS and Wins just fine. Here is a long thread on MS Technet of the exact same problem, but they don't have a good solution. Here is their workaround (It was from June of 2010): Good news - a hotfix is in the works and a workaround has been identified: Root cause is that since this is SMB1 all user sessions are on a single TCP connection to the remote server. The first user to initiate a connection to the remote SMB server has their logon-ID added to the structure defining the connection. If that user logs off all subsequent uses of that TCP session fail as the logon-id is no longer valid. As a workaround for now to keep the issue from happening you will want to have the user not logoff the Terminal Server only disconnect their sessions. Any word from anyone out there about a solution? Any help would sure be appreciated. Thanks, James

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• cygWin connect by SSH using RSA key; ssh.exe couldn't create /home/user/.ssh

  - by Kirzilla

  I'm using Win XP and I'm trying to connect by SSH to remote host using RSA key. I've investigated that cygWin recognizes Documents and Settings dir as home directory Z:\app\cwRsync\bin>cygpath -H /cygdrive/c/Documents and Settings I've created .ssh directory in Documents and Settings/user/.ssh and moved known_hosts, id_rsa, id_rsa.pub there. Now, I'm trying to connect via ssh.exe to remote host Z:\app\cwRsync\bin>ssh -p 22 [email protected] Could not create directory '/home/user/.ssh'. The authenticity of host '[remotehost.com]:22 ([remotehost.com]:22)' can't be established. RSA key fingerprint is f7:f4:2c:e0:c6:7e:d2:a4:45:70:63:df:bf:f2:84:46. Are you sure you want to continue connecting (yes/no)? What I'm doing wrong? Why ssh.exe couldn't create directory /home/user/.ssh? Thank you.

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• How to send a pipe with psexec?

  - by Pierre-Alain Vigeant

  I'm trying to execute a pipe on a remote server by using psexec. The command that I'm trying to execute is psexec \\servername DSQUERY USER -name *userpart* | DSGET USER -samid -display Currently, the | pipe symbol get executed locally which is not what is wanted (since dsget does not exist on my machine). I tried to use quote around the whole command psexec \\servername "DSQUERY USER -name *userpart* | DSGET USER -samid -display" but that resulted in psexec trying to run that whole quoted sentence as one executable, which obviously does not exist. How can I pass a pipe symbol to the remote server so that it can execute it?

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• Windows 7 automatically rearranges the start menu

  - by Brice

  I've seen so many messages on how to rearrange the Windows Start Menu and none mentioning the real problem in doing so which has been around since XP at least. I go to ProgramData/Microsoft/Windows/Start Menu and have a day making everything the way I want. For one thing, their Maintenance menu, the Accessories menu and the Administrative Tools menu, I like to put under a Tools folder that I've created. And they seem to move OK. However, within a few hours, I see some of the shortcuts have been moved back or copied back and a new copy of these folders suddenly appears again on my Start Menu at the root. This is maddening and no one seems to even notice in all the tutorials I've read. Anyone know how to change this behavior?

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• Limit number of simultaneous connections squid makes to a single server

  - by Ben Voigt

  Note: I am asking about outbound concurrent connection limits, not inbound, which is sufficiently covered on existing questions Modern browsers typically open a large number of simultaneous connections, to take advantage of the fact that TCP fairly shares bandwidth between connections. Of course, this doesn't result in fair sharing between users, so some servers have started penalizing hosts which open too many connections. This limit can be configured client-side (e.g. IE MaxConnectionsPerServer, Firefox network.http.max-connections-per-server), but the method differs for each browser and version, and many users aren't competent to adjust it themselves. So we turn to a squid transparent HTTP proxy for central management of HTTP download. How can the number of simultaneous connections from squid to a remote webserver be limited, so the webserver doesn't perceive it as abuse of concurrent connections? Ideally the limit would be per source address. Squid should accept virtually unlimited concurrent requests from the client browser, and issue them sequentially to the remote server, only N at a time, delaying (but not dropping) the others.

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• How can I evaluate the best choice of archive format for compressing files?

  - by Mehrdad

  In general, I've observed the following: Linux-y files or tools use bzip2 or gzip for distributing archives Windows-y files or tools use ZIP for distributing archives Many people use 7-Zip for creating and distributing their own archives Questions: What are the advantages and disadvantages of these formats, all of which appear to be open formats? When/why should I choose one (say, 7-Zip) over another (say, ZIP)? Why does the trend above appear to hold, even though all of these are portable formats? Are there any particular advantages to using a particular archive format on a particular platform?

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• create vmware virtual machine via command line on linux system

  - by tom smith

  evaluating/investigating vmware, and how you create a "virtual machine" using the command line for rhel/centos. basically, i want to be able to create a test virtual machine and then be able to run the VM on another system using the virtual player. so, i'm looking for pointers/articles/instructions that detail what i need (in terms of tools/apps) and the steps needed to accomplish this. i've seen a few articles/sites that discuss creating virtual machines, but they all involve using the GUI. thanks update:: while vmware is the company. there are different tools/apps provided to create a Virtual Machine. Basically, I want to do a test, to ultimately have a Virtual Machine/Image that can be run on a separate server using the vmplayer app I've seen docs that discuss using the GUI to create the VM, but haven't found any (yet) that discuss how to accomplish this using the command line approach. thanks...

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