The Misadventures of Penoi

Here's an example of a simple manifest file that will install a package (ex. apache) and will ensure that that the service was started after install

package {'httpd':
   ensure => installed,
    source => '/var/tmp/httpd-2.2.3-53.el5.centos.i386.rpm',
}

service {'httpd':
   ensure     => running,
   enable     => true,
   hasstatus  => true,
   hasrestart => true,
}

[root@learn tmp]# puppet apply httpd.install.pp
err: /Stage[main]//Service[httpd]/ensure: change from stopped to running failed: Could not start Service[httpd]: Execution of '/sbin/service httpd start' returned 1:  at /var/tmp/httpd.install.pp:11
notice: /Stage[main]//Package[httpd]/ensure: created
notice: Finished catalog run in 31.04 seconds

package { 'httpd':
ensure => installed,
source => '/var/tmp/httpd-2.2.3-53.el5.centos.i386.rpm',
}

service { 'httpd':
require => Package['httpd'],
ensure => running,
enable => true,
hasstatus => true,
hasrestart => true,
}

[root@learn tmp]# puppet apply httpd.install.pp
notice: /Stage[main]//Package[httpd]/ensure: created
notice: /Stage[main]//Service[httpd]/ensure: ensure changed 'stopped' to 'running'
notice: Finished catalog run in 34.10 seconds

[root@learn tmp]# chkconfig --list |grep httpd
httpd           0:off   1:off   2:on    3:on    4:on    5:on    6:off
pe-httpd        0:off   1:off   2:on    3:on    4:on    5:on    6:off

[root@learn tmp]# rpm -qa |grep httpd
pe-httpd-2.2.3-17.pe.el5
pe-httpd-passenger-2.2.11-11.pe.el5
httpd-2.2.3-63.el5.centos.1
[root@learn tmp]# service httpd status
httpd (pid  15355) is running...

This is one way of changing your server timezone and resync on the ntp server

 service ntpd stop

 cp /usr/share/zoneinfo/Asia/Singapore /etc/localtime

 ntpdate 

 service ntpd start 

Normally after a server rebuild you will receive a warning that the host identification has changed

 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.

ssh-keygen -f "/home/chris/.ssh/known_hosts" -R ip-address-of-the-host

My mysql database crashed after saving a snapshot thru KVM. Restarting mysqld shows errors under /var/log/mysqld.log

..check that your my.cnf matches the ibdata files..

 mkdir /srv/mysql/old
mv /srv/mysql/ib* /srv/mysql/old
service mysqld restart

To install with prompt

virt-install --prompt

virsh list

virsh destroy 

virsh autostart 

virsh autostart --disable 

virt-install --name=rhel03.localdomain -r 768 --disk path=/var/lib/libvirt/images/rhel03.localdomain.img,size=8 -l http://192.168.122.1/pub/inst -x "ks=http://192.168.122.1/pub/ks/rhel03.cfg"

virsh save centos01 centos01.snap.$(date +%y%m%d)

virsh shutdown centos01
virsh restore centos01.snap

virt-clone --original centos01 --name centos02 --file /home/penoycentral/images/centos02.img

error restoring domain unable to read from monitor

virsh managedsave-remove domain-name

Set mysql root password

mysqladmin -u root password 'new-password'

mysql> show databases;
mysql> use databasename;

mysql> show tables;

mysql> select column from tables;

$mysqldump -u  -p  > backupdatabase.sql

mysql -u  -p  < databasebackup.sql

Im a big fan of Michael Jang. Having seen this upcoming book will greatly help all RHCSA/RHCE aspirants. Hopefully Michael can give me a free copy :)

http://www.amazon.com/RHCSA-Certification-Practice-Virtual-Machines/dp/007180160X/ref=sr_1_4?s=books&ie=UTF8&qid=1335154380&sr=1-4

where is vmnetcfg in VMware Player running in Fedora 16?

It is found under:

/usr/lib/vmware/bin/vmware-netcfg

I will be sitting for Netapp Accelerated NCDA bootcamp Ontap 8.0.7-Mode next week. It will be delivered by Fastlane Singapore, one of the authorized Netapp learning Centers. Hopefully this vendor training will help me to fastrack since my company deploys Netapp storage solutions to our clients.

Will post some reviews next week (if again i have the time :) )

From the destination:(most of the commands done on the destination filer)

Initialize:

snapmirror initialize -S <source-qtree> <destination-qtree>
filer2> snapmirror initialize -S filer1:/vol/vol2/qtree-name filer2:/vol/vol0/qtree-name

> snapmirror status

>snapmirror quiesce <qtree>
filer2> snapmirror quiesce /vol/vol0/qtree-name

>snapmirror resume <destination-path>
filer2> snapmirror resume /vol/vol0/qtree-name

filer2> snapmirror quiesce /vol/vol0/qtree-name
filer2> snapmirror break /vol/vol0/qtree-name

>qtree status

filer2> snapmirror resync -S filer1:/vol/vol2/qtree-name filer2:/vol/vol0/qtree-name

Resized tmpfs space in /etc/fstab to 4g

tmpfs /dev/shm tmpfs size=4096m 0 0

[root@OEL1 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_oel1-lv_root
16G 3.8G 11G 27% /
tmpfs 2.0G 0 2.0G 0% /dev/shm
/dev/sda1 485M 51M 409M 12% /boot

[root@OEL1 ~]# mount -o remount /dev/shm
[root@OEL1 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_oel1-lv_root
16G 3.8G 11G 27% /
tmpfs 4.0G 0 4.0G 0% /dev/shm
/dev/sda1 485M 51M 409M 12% /boot
[root@OEL1 ~]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.2 (Santiago)

Will be in Sydney next week for my company induction and training for two weeks. There's a lot of things to learn. One thing that i like with my current employer is that they use Open Source technologies. Not unlike in the Financial industry that almost is proprietary.
Hopefully everything will fall into places.

Got this error when booting up my Virtual Machine in KVM

error restoring domain unable to read from monitor

virsh managedsave-remove domain-name

Fedora 16 Gnome3 gnome-extensions with cairo-dock OpenGL enabled

CNY at the office. kung hei fat choi!!!

My Linksys WRT54GL wireless router running on OpenWRT

After installing Fedora 16 on my laptop(or any RH flavors) i noticed a huge temperature difference when running Windows 7 vs Fedora/RH. Definitely, my laptop temperature is high even in idle.

Followed a workaround as discussed in Bugzilla 702953 by setting the GPU power to mid instead of using the max power

[root@fedora ~]# acpi -t
Thermal 0: ok, 78.0 degrees C

[root@fedora ~]# echo mid > /sys/class/drm/card0/device/power_profile

[root@fedora ~]# echo `date` && acpi -t
Sun Dec 4 06:18:35 SGT 2011
Thermal 0: ok, 71.0 degrees C
[root@fedora ~]# echo `date` && acpi -t
Sun Dec 4 06:30:05 SGT 2011
Thermal 0: ok, 68.0 degrees C

[root@fedora ~]# sensors
acpitz-virtual-0
Adapter: Virtual device
temp1: +83.0°C (crit = +103.0°C)

radeon-pci-0100
Adapter: PCI adapter
temp1: +84.0°C

The Youth's Album na walang pamagat is the best Pinoy album that was produced in the 90's when it comes to technicality of the recording. After 17 years, it still sounds good and will not be needing a remaster version for the next 10 yrs :)

I noticed that my CPU load is in havoc even in idle. Interestingly, the culprit was the Razer Mamba systemtray process.

http://www.overclock.net/t/1155194/cpu-mem-usage/10

 

To disable Razer Mamba System Tray at bootup

Click Run and type System Configuration

Click on Startup tab and uncheck "Razer Mamba Systray" then Apply

My family's new place here in Singapore rocks!!! and i got my own small office too. Will post some pix once i've done arranging my things... time to upgrade my 2.1 speaker which i got as free on my Canon printer?? will see once my budget officer approved.