how to setup a nested esx lab at home

Introduction

This is meant as a walk through for setting up a small lab at home with access to the internet via your home’s residential  ISP provider. The network has only one lan and either a DSL or Cable modem link

A few hints:

how to enable postfix on fedora 20

so in fedora 20 the powers that be decided that no default mail transport agent program will be installed. the decision was made based on the "fact" that fedora is used "exclusively" on desktops. and on desktop there is no single program that uses the MTA to send mail to root to warn of any impending disk failure or security breach. mail? pfffffft! who needs it.

this how to aims to rectify that situation. so as root

yum -y install postfix
alternatives --config mta
newaliases
service postfix restart
chkconfig postfix on

and thank you very much!

how to enable the grub splash screen on fedora

the grub splash screen is a graphical boot up instead of the text mode. having a grub splash screen is not only pretty but sort of gives continuity to the entire linux graphics experience. and this is how you do it

its a 2 step process:

the first step is to install the theme

yum -y install grub2-starfield-theme

the next step is to add a line as root to /etc/default/grub

echo "GRUB_THEME=\"/boot/grub2/themes/system/theme.txt\"" >> /etc/default/grub

then modify the line

t420 fan management on fedora

so my lenovo t420 would keep heating up and then suddenly shutting down. not cool when you have mysql running coz then you got to remove the stale pid. so i finally got round to doing some research and this is what i came up with

howto disable akonadi and nepomuk for users on a system

last week, the family pc had its memory decreased as i decided i needed the ram elsewhere. what happened was entirely unexpected. just a single user on system would make the system crawl and unexplained disk i/o occurred. so i did a little research and if you reached here too, you probably did a little reasearch on your own.

howto configure for nested kvm

so i wanted to run openstack on a vm. that means i need to run nested kvm. thing is i didnt know how to configure it. so i had to do some research.

the end result of my research is this script

how to suspend a guest on kvm host shutdown

on a kvm host, the default action when the host is shutdown is .. to do nothing. so what the guest see is the power suddenly being removed.the solution is to modify /etc/sysconfig/libvirt-guests and and modify the ON_SHUTDOWN parameter. you got 2 choices suspend or shutdown

howto: configure dovecot on centos/rhel 6.4

dovecot is a pop3 and imap server. it is of course open source. it goes on top of your mail transport agent (MTA) such as sendmail or postfix. as with all things difficult, it is only difficult if you do not know it.

funny thing is, i took it in my RHCE class and i still have my notes and ..they didnt work. so i had to do some research and this is the result

we will start with installing dovecot

yum -y install dovecot

next we will create the certs:

unix tools for windows(R)

as a unix admin, we sometimes do not get the choice of operating system for our personal workstation and yet we want some of the unix tools to make our lives easier. we install those pieces piecemeal or as a package. the most famous package is cygwin/windowsbut cygwin requires it to be installed. i was introduced instead to a single executable that does that and more. it has ssh and rdp and xterm and xwindows server and ... well you get the picture.

its not all the tools but it is MobaXterm

macvtap not supported on wifi nics

repeat after me : macvtap not supported on wifi nics

what is macvtap? well this page best describes its uses

and the source of this is a launchpad bug

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