penoycentral.net » Linux/Nix

penoycentral’s wiki page

penoycentral — Thu, 19 Aug 2010 06:17:40 +0000

been busy for the past days.. my wife almost due with her pregnancy… my long overdue second Solaris exam that i need to complete before Oracle release Solaris 11 on that note i created my own Wiki page. Its a work in progress and will update any technical stuffs that i do at work and anything that i come with my self-paced study. You can check the wiki at Penoycentral Wiki Page

Novell Data Center Technical Specialist

penoycentral — Tue, 09 Mar 2010 17:22:06 +0000

After the free Novell Certified Linux Administrator certification, now Novell again gives free certification. Novell Data Center Technical Specialist. Everyone who received this cert is clueless what does this means. Quick search on the Novell site does’nt give any result or info.

I’m not sure if i will add this cert on my CV. Free cert without exam? Bad idea i guess..

Linux Professional Institute alumni to receive Novell Certified Linux Administrator

penoycentral — Wed, 17 Feb 2010 13:20:01 +0000

Linux Professional Institute alumni to receive Novell Certified Linux Administrator for free. As in for free!!! No charge or extra exam to take. As long you are a LPIC-1 certified, you are eligible to be a CLA certified. So what’s the catch? Seems Novell wants to boost their marketing strategy and pump up the numbers of certified professional under their umbrella.

To validate your LPIC go to https://cs.lpi.org/caf/Xamman/certification and apply for Novell CLA certification at http://practicum.novell.com/LPI2CLAForm.php. Fill out the form, provide your LPI ID and verification code. Allow 1 business day before they send your pdf certification stating that you are a certified SUSE Linux Enterprise 11 admin!!!

Configuring clients users home directory in NIS using Solaris 10

penoycentral — Wed, 13 Aug 2008 04:16:14 +0000

In this setup, my server also serves as the Network Information Service(NIS) server and NFS indirect sharing for user’s home directory.

Checking my server’s NFS shares

Sun Microsystems Inc.   SunOS 5.10      Generic January 2005
-bash-3.00# share
-               /jumpstart   ro,anon=0   “”
-               /installer   ro,anon=0   “”
-               /export/home   rw   “”
-bash-3.00#

My passwd file as an input file for NIS Makefile

-bash-3.00# more /etc/nis_etc/passwd
chris:x:100:1::/home/chris:/bin/bash

Auto_master file

-bash-3.00# more /etc/auto_master
#
# Copyright 2003 Sun Microsystems, Inc. All rights reserved.
# Use is subject to license terms.
#
# ident “@(#)auto_master        1.8     03/04/28 SMI”
#
# Master map for automounter
#
+auto_master
/net            -hosts          -nosuid,nobrowse
#/home          auto_home       -nobrowse
/home           auto.home

Auto_home file. server1 is the NIS and NFS server

-bash-3.00# more /etc/auto_home
#
# Copyright 2003 Sun Microsystems, Inc. All rights reserved.
# Use is subject to license terms.
#
# ident “@(#)auto_home 1.6 03/04/28 SMI”
#
# Home directory map for automounter
#
+auto_home
chris server1:/export/home/chris

Makefile in /var/yp

…..

all: passwd group hosts ipnodes ethers networks rpc services protocols \
netgroup bootparams aliases publickey netid netmasks c2secure \
timezone auto.master auto.home ageing \
auth.attr exec.attr prof.attr user.attr audit.user
…..

auto.master.time: $(DIR)/auto_master
-@if [ -f $(DIR)/auto_master ]; then \
sed -e “/^#/d” -e s/#.*$$// $(DIR)/auto_master \
| $(MAKEDBM) – $(YPDBDIR)/$(DOM)/auto.master; \
touch auto.master.time; \
echo “updated auto.master”; \
if [ ! $(NOPUSH) ]; then \
$(YPPUSH) auto.master; \
echo “pushed auto.master”; \
else \
: ; \
fi \
else \
echo “couldn’t find $(DIR)/auto_master”; \
fi

auto.home.time: $(DIR)/auto_home
-@if [ -f $(DIR)/auto_home ]; then \
sed -e “/^#/d” -e s/#.*$$// $(DIR)/auto_home \
| $(MAKEDBM) – $(YPDBDIR)/$(DOM)/auto.home; \
touch auto.home.time; \
echo “updated auto.home”; \
if [ ! $(NOPUSH) ]; then \

Configure NIS maps using ‘make’

-bash-3.00# pwd
/var/yp
-bash-3.00# /usr/ccs/bin/make

Checking auto.master and auto.home maps

-bash-3.00# ypcat -k auto.master
+auto_master
/home auto.home
/net -hosts -nosuid,nobrowse
-bash-3.00# ypcat -k auto.home
+auto_home
chris server1:/export/home/chris

Configure /etc/nsswitch.conf automount of your clients

automount: files nis

Penoi’s Veritas Volume Manager Notes

penoycentral — Mon, 11 Aug 2008 05:30:40 +0000

This is my personal notes on Veritas Volume Manager. This page is a continuing notes of frequent commands that i use in VxVM

Initialization

Disk initialization

/usr/lib/vxvm/bin/vxdisksetup -iv [device_tag][attributes]

Example:

#/usr/lib/vxvm/vxdisksetup -iv c2t0d0

Creation
Create initial disk group

vxdg init [diskgroup] [disk_name=device_tag]

Example:

#vxdg init newdg disk1=c2t0d0

Add more disk to the Disk Group

vxdg -g [disk_group] adddisk [disk_name=device_tag]

Example

#vxdg -g newdg adddisk disk2=c2t1d0

Volume Creation

Concatenated Volume

vxassist -g [disk group] make [volume_name] [size]

Example

#vxassist -g newdg make newvol 500m

Concatenated Volume by specifying the disk

# vxassist -g newdg make newvol disk02 disk03

Striped Volume

vxassist -g [disk group] make [volume_name] [length] layout=stripe ncol=n stripeunit=size

Example

#vxassist -g newdg make newvol 500m layout=stripe

Mirrored Volume

#vxassist -g newdg make newvol 500m layout=mirror

Viewing VxVM

View Disk Group disk info

#vxdisk -o alldgs list

View Sub disk

#vxprint -ls

View Plexes

#vxprint -lp

View Volumes

#vxprint -lv

Removing
–loading–

Adding RTL8111B/RTL8111C network driver to Solaris Jumpstart

penoycentral — Fri, 08 Aug 2008 06:13:15 +0000

My jumpstart client has a builtin RTL8111B/RTL8111C network card. When i boot up the client thru PXE booting it gives me an error “no driver was found for the interface used to boot jumpstart”

Download the updated SUNWrge package, this holds the driver for rge

http://www.aplis.cz/SUNWrge.tar.gz

My Jumpstart image is shared thru NFS in /installer directory

#cd /installer/boot

Create a temporary miniroot directory

#mkdir x86.miniroot-rge.unpacked

Unpack the existing miniroot to the temp miniroot directory

#/boot/solaris/bin/root_archive unpack ./x86.miniroot ./x86.miniroot-rge.unpacked

Remove the existing SUNWrge package

#pkgrm SUNWrge

Add the updated SUNWrge package

#cd /export/home/john
#gunzip SUNWrge.tar.gz
#tar xvf SUNWrge.tar
#pkgadd -d . SUNWrge

Check the new aliases

#grep rge /etc/name_to_major /etc/driver_aliases
/etc/driver_aliases:rge “pci10ec,8169″
/etc/driver_aliases:rge “pci10ec,8110″
/etc/driver_aliases:rge “pci10ec,8168″
/etc/driver_aliases:rge “pci10ec,8111″

Remove the existing rge driver in the jumpstart miniroot

#cd /installer/boot
#/usr/sbin/rem_drv -b ./x86.miniroot-rge.unpacked/ rge

Add the new driver

#/usr/sbin/add_drv -b ./x86.miniroot-rge.unpacked -n -v -m ‘* 0600 root sys’ -i ‘”pci10ec,8169″ “pci10ec,8110″ “pci10ec,8168″ “pci10ec,8111″‘ rge

Reboot client to install driver.
Driver (rge) installed.

Backup original miniroot

#mv x86.miniroot x86.miniroot.orig

Compress the new Jumpstart miniroot

#/boot/solaris/bin/root_archive pack ./x86.miniroot ./x86.miniroot-rge.unpacked/

Sources:
Jeff’s Solaris Admin blog

General Solaris 10 discussion

Network Storage Foundation

penoycentral — Tue, 29 Jul 2008 10:27:03 +0000

Today we discussed introduction on NAS and SAN. Many companies offers such kind of technology product. Even the open source community has its own implementation like FreeNAS and NexentaStor. This will play a great part on my future jobs, so i have to deeply learn this technology.

Cleared Linux Professional Institute Certification Level-1

penoycentral — Thu, 03 Jul 2008 03:34:17 +0000

After 3 weeks of waiting, i received yesterday the result of my Linux Professional Institute Certification (LPI)Level-1 exam and the grade was PASS. I can’t believe i nailed exam 102 in which im not sure with my answer. With a passing grade of 500, i got 560!!! what a luck eh!!!!. Hopefully i will have time to review for Level 2 exam. Got to learn Solaris first.

Solaris for newbie

penoycentral — Wed, 18 Jun 2008 08:31:48 +0000

Starting to learn Sun Solaris. Mainly, my work experience heavily focused on Redhat Linux. Still so many things to catch up. Got this free Solaris ebook for newbie and it has the information that i need for my initial study on Solaris. Must obtain my certification on Solaris in two months time. For my simulation labs, i will try to install virtualbox tonight.

SSH Port Forwarding Passive FTP

penoycentral — Tue, 06 May 2008 08:19:56 +0000

Initialize ssh port forwarding of FTP

#modprobe ip_conntrack

#modprobe ip_conntrack_ftp

#modprobe ip_nat_ftp

#echo 1 > /proc/sys/net/ipv4/ip_forward

Iptables port forwarding rules
iptables -t nat -A PREROUTING -p tcp --dport 21 -i -j DNAT --to :21 iptables -t nat -A POSTROUTING -p tcp -d --dport 21 -j SNAT --to-source