Category Archives: Servers

Bind : Unexpected RCODE (REFUSED) resolving ‘xx.xx.xx.xx.in-addr.arpa/PTR/IN’

Experiencing this error in Bind logs? named[xxxxxx]: unexpected RCODE (REFUSED) resolving ‘xx.xx.xx.xx.in-addr.arpa/PTR/IN’: xxx.xxx.xxx.xxx#53 This is probably because you have a forwarder in your named.conf that refuse your requests. Simply look at the end of the previous line : “xxx.xxx.xxx.xxx#53” and search this address in your named configuration file – it should be located inside the… Read More »

Bind : Transfer of ‘domain.tld’ from xx.xx.xx.xx#53 failed receiving responses permission denied

I recently notice this error on a master/slave Bind (named) DNS server setup (this error actually happened on slaves servers) : transfer of ‘domain.tld/IN’ from xxx.xxx.xxx.xxx#53: failed while receiving responses: permission denied First, make sure the “allow-transfer” directive is properly set on the primary master server : allow-transfer { xxx.xxx.xxx.xxx; }; This is probably the… Read More »

Linux : SuSE repository links for YaST

There is some useful repositories for SuSE Linux. Just add the version of the distribution you are using at the end of the links before adding them to YaST. UnixHeads Packman : http://packman.inode.at/suse/ http://ftp.uni-erlangen.de/pub/mirrors/packman/suse/ VideoLAN Client : http://download.videolan.org/pub/videolan/vlc/SuSE/ Nvidia : ftp://download.nvidia.com/opensuse/

VMware : Install ESX tools for RHEL / CentOS Linux using YUM

To install VMware Tools from the ESX repository on RedHat/CentOS Linux guests using YUM, you need first to install the public key : rpm –import http://packages.vmware.com/tools/keys/VMWARE-PACKAGING-GPG-RSA-KEY.pub [Updated 06/03/12 : key URL has changed. Old location : http://packages.vmware.com/tools/VMWARE-PACKAGING-GPG-KEY.pub)] Now, you need to create the repository file located in /etc/yum.repos.d : vi /etc/yum.repos.d/vmware-tools.repo And then, paste the… Read More »

Dell Servers : PCIe Training Error

Experiencing this error on Dell rack mount server? PCIe Training Error:  Slot X (or Embedded I/O Bridge device X) System Halted Try removing any add-in card and boot the server. If the server is booting correctly, then it’s probably the add-in card! If the problem persist, try to completely remove the riser card. Now it should… Read More »

OpenVZ : Unable to set capacity on running container

Got this error trying to adjust time on a VPS from the host node? [root@server ~]# vzctl set 111 –capability sys_timen –save Unable to set capability on running container WARNING: Some of the parameters could not be applied to a running container. Please consider using –setmode option There is two possible solutions : 1. Stop… Read More »

Linux : How to generate SSL certificate key pair

Here are the few steps to generate the private key, certificate signed request, self-signed certificate and how to get rid of the passphrase request when starting you’re application . Okay, let’s start. Go to the directory you want to store you’re certificate stuff. This example will assume you’re common name (aka : host name) will… Read More »

Postfix : postdrop warning unable to look up public/pickup

Getting this error trying to send e-mail with Postfix MTA? postdrop: warning: unable to look up public/pickup: No such file or directory Simply do the following as root : mkfifo /var/spool/postfix/public/pickup And then, restart the service : service postfix restart