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