VMWare

Text with a white background will vary between users and systems.

Text in a Courier/Serif-type font is to be typed at a terminal/command prompt.

Text inside [square brackets] is optional to the command and can be ignored or changed.

"example.net" is a fictitious domain.

Clock issue with Redhat/CentOS/Fedora

VMWare guests can have problems with their clock running too fast or too slowly. If this is a problem then try these steps:

Disable ntpd:

chkconfig ntpd off ; /etc/init.d/ntpd stop

Add boot-time parameters:

Append clock=pit nosmp noapic nolapic to /boot/grub/grub.conf:

   title CentOS (2.6.18-53.1.14.el5)
      root (hd0,0)
      kernel /vmlinuz-2.6.18-53.1.14.el5 ro root=/dev/VolGroup00/LogVol00 rhgb quiet clock=pit nosmp noapic nolapic
      initrd /initrd-2.6.18-53.1.14.el5.img

Reboot

A script to monitor clock drift:

#!/bin/bash

ntp_server="clock.redhat.com"
[ -f /var/lock/subsys/ntpd ] && /etc/init.d/ntpd stop
ntpdate $ntp_server
/sbin/hwclock

  while true
    do
      out=`ntpdate -q $ntp_server | grep ntpdate`
      time=`echo $out | awk '{print $3}'`
      skew=`echo $out | awk '{print $10}' | awk -F. '{print $1}'`
      echo "$time $skew seconds"
      echo "$time $skew seconds" >> drift.log
      sleep 60
    done

Network issue with Redhat/Fedora

Getting the network up "Error message: no link present. Check cable?":

vi /etc/sysconfig/network-scripts/ifcfg-eth0

Append the lines:

check_link_down () {
return 1;
}

Bring the network interface up:

ifup eth0

Network issue with Debian/Ubuntu

SIOCSIFADDR errors:

vi /etc/udev/rules.d/z25_persistent-net.rules

Remove any sections that refer to the interface that doesn't work, e.g.

# PCI device 0x10ec:0x8167 (r8169)
SUBSYSTEM=="net", DRIVERS=="?*", ATTRS{address}=="00:19:db:49:71:36", NAME="eth0"

Reboot

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