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• JBoss thrown error looking up local address when starting

  - by Jeeba

  Hello im installing a fresh Jboss 5.1 in a Centos 5.5 machine. I dont have Apache installed. So when I try to start jboss using the comand ./run.sh I get the following error 15:13:57,414 INFO [JMXKernel] Legacy JMX core initialized 15:14:03,856 ERROR [ServerInfo] Error looking up local address java.net.UnknownHostException: dhcppc1: dhcppc1 at java.net.InetAddress.getLocalHost(InetAddress.java:1354) at org.jboss.system.server.ServerInfo.getHostAddress(ServerInfo.java:364) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) .... After that i can run Jboss only from 127.0.0.1:8080 but using localhost:8080 doesnt work. I think its a centos configuration problem but im a total newbye managing ports and maybe firewalls, so what do you think could be the problem?

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• SBS 2011 on different subnet than domain computers

  - by Ravi

  The setup is as follows: SBS 2011 in datacentre on subnet A Domain PCs at another location on subnet B There is a site-to-site VPN. The domain PCs have joined the domain and have the SBS as their primary DNS server. The domain PCs can ping the DC but the problem is that the DC cannot ping any of the remote subnet (subnet B) SBS --Switch -- Router A ------------------- Router B -- Switch -- Domain PCs What is strange is that router A can ping any host on the subnet B. Another host on Subnet A can also ping any host on subnet B. It's only the DC which cannot ping anything to that specific remote subnet B. I did a tracert from the SBS to router B. The packet reaches Router A from the SBS but then it fails. Am I missing some specific settings that needs to be done when SBS is on a different subnet than its member pcs ?

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• Problem with gmailfs

  - by user35529

  Hello(????????????) I've got a little with gmailfs. I'm trying to mount gmail accout as a local file system on my Debian Lenny using the following command. mount -t gmailfs none /mnt/gmail -o [email protected],password=mypassword,fsname=SixSixSix But it gives my garbage like this Ignored option :rw Traceback (most recent call last): File "/sbin/mount.gmailfs", line 166, in <module> main(mountpoint, namedOptions, useEncfs) File "/sbin/mount.gmailfs", line 92, in main gmailfs.main(mountpoint, namedOptions) File "/usr/lib/python2.5/site-packages/gmailfs.py", line 1175, in main server = Gmailfs(namedOptions,mountpoint,version="gmailfs 0.8.0",usage='',dash_s_do='setsingle') File "/usr/lib/python2.5/site-packages/gmailfs.py", line 611, in __init__ self.ga.login() File "/usr/lib/python2.5/site-packages/libgmail.py", line 316, in login raise GmailLoginFailure("Login failed. (Wrong username/password?)") libgmail.GmailLoginFailure: 'Login failed. (Wrong username/password?)' Username and Password are totally correct.

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• Puppet, Nagios, Munin on cPanel based hosts

  - by WinkyWolly

  I've been managing 20-30~ cPanel based hosts over the past year with Puppet, Nagios and Munin for general monitoring / trending however a lot of the methods I've had to use to deploy / manage things such as configurations a pain. For those of you who aren't familiar with cPanel - it adds a few things to yum exclude such as perl*, ruby* and so forth. This causes issues with me being able to bootstrap monitoring on a new server via Puppet (well via the Package type) due to a bunch of conflicts with installing via Yum. Now I could create a custom RPM for everything and remove certain dependencies from the spec file however I would like to avoid this if possible. Does anyone have any proposed functional ways to manage this sort of environment? Currently I install Puppet, Facter and Munin via RPM's and force install using --nodeps and such (since they're installed, just no the ones Yum wants). Nagios I installed manually from source at this time (likely will create RPM's however I want to tackle this general issue first).

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• App Pool doesn't respect memory limits

  - by lucuma

  I am dealing with a legacy .NET app that has a memory leak. In order to try and mitigate a run away memory situation, I've set the app pool memory limits from anywhere between 500KB to 500000KB (500MB) however the app pool doesn't seem to respect the settings as I can login and view the physical memory for it (5GB and above no matter what values). This app is killing the server and I can't seem to determine how to adjust the app pool. What settings do you recommend in order to ensure this app pool doesn't exceed around 500mb of memory. Here is an example, the app pool is using 3.5GB of

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• How do I get meaningful error messages in IIS7?

  - by Petras

  I have a classic ASP website that is crashing in IIS7. It is crashing because IIS doesn't allow file uploads greater than a certain size. I know this because files below about 200k work fine. I removed the Status Code 500 error in IIS but I still don't get a file name and the line where my code failed as I do when running locally. Instead I get: "The page cannot be displayed because an internal server error has occurred. If you are the system administrator please click here to find out more about this error." How do I get a file name and the line where my code failed? Here are my IIS settings:

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• What's the best way to clean up after a fork bomb?

  - by raldi

  $ ls bash: no more processes Uh oh. Looks like someone made a fork bomb. Where I used to work, this pretty much meant that the shared server would need to be power-cycled, since even the sysadmins with root often couldn't get the problem cleaned up. Often, they couldn't even get a prompt. I've heard a few tricks (notably, to send STOP signals rather than KILL signals, since the latter would allow the remaining threads to immediately replace the killed ones), but I've never seen a comprehensive guide entitled So, You Have Yourself a Fork Bomb? Let's make one.

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• Does disable log error for MySQL increasing it's performance ? How disable it?

  - by adnan

  Does disable log error for MySQL increasing it's performance ? How disable it ? This is my service status Server load 0.63 (8 CPUs) Memory Used 23.38% (957,600 of 4,096,000) Swap Used 0% (0 of 1) And this is print screen for process manager http://elnhrda.com/promgr.jpg This is my.cnf [mysqld] query_cache_size=64M skip-name-resolve #innodb_file_per_table=1 query_cache_limit=2M read_buffer_size = 2M read_rnd_buffer_size = 16M sort_buffer_size = 8M join_buffer_size = 8M thread_cache_size = 8 thread_concurrency = 8 innodb_buffer_pool_size = 2G Iam looking for doing any thing to increase my website speed I have VPS 4G.B RAM CENTOS 6 X86_64 Note please : this statics taken now which no any queries executed & site have not any visitors in the same time

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• Network topology question

  - by Asbie

  We currently have three networks, X.X.163.1, X.X.93.1 and 192.168.1.1. Today's setup is like this: http://i.imgur.com/tkKWy.jpg We now have PPT VPN from internet to the X.X.163.1-network, but really need to access the files from the File Server through VPN. I am also aware that this setup is not optimal. So please, any advices on how to redesign our network? Rack servers are mostly web and db servers, with only public IP addresses.

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• Network vulnerability and port scanning services

  - by DigitalRoss

  I'm setting up a periodic port scan and vulnerability scan for a medium-sized network implementing a customer-facing web application. The hosts run CentOS 5.4. I've used tools like Nmap and OpenVAS, but our firewall rules have special cases for connections originating from our own facilities and servers, so really the scan should be done from the outside. Rather than set up a VPS or EC2 server and configuring it with various tools, it seems like this could just be contracted out to a port and vulnerability scanning service. If they do it professionally they may be more up to date than something I set up and let run for a year... Any recommendations or experience doing this?

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• What does this RPC error message mean?

  - by user161834

  I have OS RHNL release 6.2 and use the NFS service (nfs-utils-1.2.3) to connect to NFS server, And found a lot of messages in a file /var/log/messages: Apr 1 11:08:35 XXX rpc.idmapd[3010]: nss_getpwnam: name '2' does not map into domain 'XXXX.com' Apr 1 11:14:26 XXX rpc.idmapd[3010]: nss_getpwnam: name '0' does not map into domain 'XXXX.com' Apr 1 11:18:36 XXX rpc.idmapd[3010]: nss_getpwnam: name '2' does not map into domain 'XXXX.com' Apr 1 11:24:27 XXX rpc.idmapd[3010]: nss_getpwnam: name '0' does not map into domain 'XXXX.com' Apr 1 11:28:37 XXX rpc.idmapd[3010]: nss_getpwnam: name '2' does not map into domain 'XXXX.com' Apr 1 11:34:27 XXX rpc.idmapd[3010]: nss_getpwnam: name '0' does not map into domain 'XXXX.com' Apr 1 11:38:37 XXX rpc.idmapd[3010]: nss_getpwnam: name '2' does not map into domain 'XXXX.com' Apr 1 11:44:28 XXX rpc.idmapd[3010]: nss_getpwnam: name '0' does not map into domain 'XXXX.com' Apr 1 11:48:37 XXX rpc.idmapd[3010]: nss_getpwnam: name '2' does not map into domain 'XXXX.com' What does this message mean ?

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• IIS: redirect everything to another URL, except for one Directory

  - by DrStalker

  I have an IIS server (IIS 6, Win 2003) that hosts the site http://www.foo.com. I want any request to http://foo.com (no matter what path/filename is used) to redirect to http://www.bar.org/AwesomePage.html UNLESS the request is for http://www.foo.com/specialdir, in which case the HTML files in the local directory specialdir should be used. The problem I have is once the redirect is set it also affects /specialdir - even if I right click on that directory and select "content should come from ... local directory" that change does not take effect, and the directory still shows as redirecting to http://www.bar.org/AwesomePage.html. The same thing happens if I try to set individual files to load from the local system instead of redirecting - IIS gives no error, but the change does not take effect and the files still show as being redirected. How can I set specialdir to override the redirection to the new URL?

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• Tomcat - virtualhosting - name / ip / port - based

  - by lisak

  Hey, what are the usage scenarios for these kinds of virtual hosting ? Name Based - typical tomcat virtual hosting, one HOME instance with many contexts, each as an individual host IP based / port based - multiple instances of tomcat ( how is it with performance and memory consuption?) running on IP aliases (virtual IPs) for one network adapter, usually behind http apache server that can run name based virtual hostings. Otherwise I can't figure out how would I forward requests in iptables/firewall based on IP address, which is just one. How is IP based virtual hosting done as to Tomcat and multiple instances ? I'd like to hear some usage scenarios from your experience. How are you running your applications. Cause there are applications having it's own modified classloader and they are developed in a way to run alone withing a tomcat instance. Then there are trivial applications which can run within one instance without problems. Many thanks

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• How to redirect (or Alias) jump page with Apache

  - by Meltemi

  I'm not an Apache expert but need to make a small change to a web server. We are introducing a "jump page" URL that is different from a primary URL (for tracking reasons). /productA/index.html /productA/jump_index.html Basically i want to log that jump_index.html was requested and then return index.html. I don't want the client to wait 8 seconds or so for a redirect. How should we be handling this? Simply symlink (or alias) the file in the filesystem? Use mod_alias Alias Match (if so how exactly)? something better still? Edit: mod_rewrite in httpd.conf: <IfModule mod_rewrite.c> RewriteEngine On RewriteCond %{REQUEST_METHOD} ^TRACE RewriteRule .* - [F] </IfModule>

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• Why aren't Heroku syslog drains logging to rsyslogd?

  - by Benjamin Oakes

  I'm having a problem using syslog drains as described in https://devcenter.heroku.com/articles/logging. To summarize, I have an Ubuntu 10.04 instance on EC2 that is running rsyslogd. I've also set up the security groups as they describe, and added a syslog drain using a command like heroku drains:add syslog://host1.example.com:514. I can send messages from the Heroku console to my rsyslogd instance via nc. I see them appear in the log file, so I know there isn't a firewall/security group issue.  However, Heroku does not seem to be forwarding log messages to the server that heroku drains lists. I would expect to see HTTP requests, Rails messages, etc. Is there something else I can try to figure this out? I'm new to rsyslogd, so I could easily be missing something.

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• SNMPD timeout yet netcat shows port as open

  - by Kirill Gordeenko

  SNMPD config (I have this config working on a different server): com2sec readonly default public group MyROGroup v1 readonly group MyROGroup v2c readonly group MyROGroup usm readonly view all included .1 80 access MyROGroup "" any noauth exact all none none syslocation <LOCATION> syscontact <CONTACT> When I check the port from remote machine: » nc -zvu xx.xx.xx.xx 161 Connection to xx.xx.xx.xx 161 port [udp/snmp] succeeded! This also works locally (I get all the right stats): snmpwalk -v 2c -c public localhost Yet when I try same command locally or remotely with external IP: Timeout: No Response from xx.xx.xx.xx IPTables are disabled on both machines. /etc/sysconfig/snmpd looks like this: OPTIONS="-Lsd -Lf /dev/null -p /var/run/snmpd.pid" -a /etc/default/snmpd is empty.

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• Compiling to a binary from source

  - by Chords

  I'm using WKHTMLTOPDF on a 64-bit Linux server and I'm running into problems with the version. Seen here: http://code.google.com/p/wkhtmltopdf/downloads/list There's slim pickins when it comes to pre-compiled binaries. I started with version 0.9.9 which has a few bugs. I upgraded to 0.11.0 RC 1 to find a slew of new problems, namely the following: http://code.google.com/p/wkhtmltopdf/issues/detail?id=730 I think 0.10 RC 2 would work, and the thread above suggests compiling from the source has a fix for the error I'm getting, but I don't know how to do that. Can anyone explain how I can create a static binary myself, or would anyone be willing to create and post one for the countless people waiting for this fix?

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• Remote support via VPN without split tunnel

  - by Robe Eleckers

  my title might not be very clear, but I'll explain my setup in more detail now. We have several customers (companies) that need to be remotely supported. At these customers we have servers running with our software that needs to be serviced. These servers are (almost) never connected to the internet. For this we have multiple PC's running VPN clients. These PC's run a VNC server so our service engineers can login from their home laptop remotely to these PC's and connect from there to our customer via the VPN connection on the PC. The problem is however that several customers do not allow split tunneling. That means that when we connect via VPN to such a customer the VNC connection drops. Our current workaround is using a Citrix VM which we control via XenCenter console, but it's quite slow. Are there common solutions to handle this?

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• IBM BladeServer Chassis compatibility

  - by Matt

  Hi, I'm looking at buying a 3 year old blade server. My question is, if I buy it and want to insert a current model blade, will it fit? Also, if the chassis goes "POP" and I need to replace it, will the current model chassis fit 3 year old blades? What about Power supply replacements? The chassis I'm looking at is this: IBM FRU / PN: M8677-3XM with DVD reader The blades are all IBM HS20's. We've had a good run with IBM hardware and although there is some nice ex-lease HP hardware available, my understanding is that backwards comparability is not so well maintained. Is this true?

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• Group policy preventing XenApp from creating start menu menus

  - by JohnyV

  I have a citrix Xenapp server that has some apps installed. The are placed in a folder and set to populate the start menu. The problem is when I log on with a user from a particular OU I am unable to get the start menu inserted from xenapp. It is quite a restrictive group policy but does anyone know the setting for preventing users from modifying the start menu. I have tried "Prevent changes to Taskbar and Start Menu Settings" but this didnt work. Any ideas would be great. I know it isnt permissions because I have another user that has the same permissions assigned to them, the only difference is that one user gets the restrictive group policy and the other doesnt. Thanks

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• tracd multiple projects+nginx reverse proxy

  - by Xeross

  I am trying to setup nginx with a reverse proxy to tracd, however I only want to use 1 tracd. Now first here's my config for this domain server { listen 80; server_name bugs.XXXXXXXX.com; access_log /var/log/nginx/XXXXXXXX-bugtracker.access.log proxy; location / { rewrite ^/bugtracker/(.*)$ /$1; rewrite ^/bugtracker$ /; proxy_pass http://127.0.0.1:81/bugtracker/; proxy_redirect default; proxy_set_header Host $host; } location ~ /\.ht { deny all; } } As you can see there's the rewrite rules, because for some reason all the urls that tracd spews out are like /bugtracker/something. Now this is indeed caused by tracd just sending urls like it normally should however trac is at bugs.XXXXXXXX.com/ and not at bugs.XXXXXXXX.com/bugtracker. So how can I make tracd/trac display the (In this case) correct urls ?

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• Reinstall ruby (or just yaml lib)

  - by Christian Sciberras

  I've installed ruby 1.9 from source, and tried installing gem 'bundler': < gem install bundler > /usr/local/lib/ruby/1.9.1/yaml.rb:56:in `<top (required)>': > It seems your ruby installation is missing psych (for YAML output). > To eliminate this warning, please install libyaml and reinstall your ruby. > .... I've not been able to cleanly uninstall ruby (wtf?!), and installing libyaml at this point didn't help either. So it seems I've ended up with a fk-ed up server since I can't rollback nor fix the issue. Of course, I do have backups, but this situation is ridiculous nonetheless. Surely there must be a real fix?

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• Set top level directory to be handled by Perl?

  - by Sam Lee

  I have an Apache server set up to use mod_perl. I have it set up to handle all requests using a Perl module MyModule. Here is part of my httpd.conf: LoadModule perl_module modules/mod_perl.so <Directory /> Order Deny,Allow Allow from all </Directory> PerlModule MyModule <Location /> SetHandler modperl PerlResponseHandler MyModule </Location> This seems to work fine, except top level directory (ie. www.mysite.com/) is not being sent to MyModule. What's going wrong?

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• username and password for rsync in script

  - by sims

  I'm creating a cron job to keep two dirs in sync. I'm using rsync. I'm running an rsync daemon. I read the manual and it says: RSYNC_PASSWORD Setting RSYNC_PASSWORD to the required password allows you to run authenticated rsync connections to an rsync daemon without user intervention. Note that this does not supply a password to a shell transport such as ssh. USER or LOGNAME The USER or LOGNAME environment variables are used to determine the default username sent to an rsync daemon. If neither is set, the username defaults to 'nobody' I have something like: #!/bin/bash USER=name RSYNC_PASSWORD=pass DEST="server::module" /usr/bin/rsync -rltvvv . $DEST I also tried exporting (dangerous, I know) USER and RSYNC_PASSWORD. I also tried with LOGNAME. Nothing works. Am I doing this correctly?

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• Is there a way to communicate DBMS with raw memory block or binaries

  - by darkcminor

  I am trying to communicate a numerical matrix operations library like LAPACK with any DBMS. Is it possible to send/receive complete matrices as binary or as a direct memory pointers to process them (it will be something like: The Outside library processes data stored in DBMS, then it computes some huge matrix stuff and then via memory block or a binary DBMS get the result from library)? The main purpose is speed and avoid passing through a flat file, and last but not least, use library toefficiently do some operations DBMS are not designed to. * Is it possible that Oracle, SQL Server, MySQL support this technique?.

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