Custom Linux bootable CD - Revision history

Kamran at 22:23, 15 July 2010

2010-07-15T22:23:37Z

← Older revision		Revision as of 22:23, 15 July 2010
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-	Please send your thoughts/comments on kamran at wbitt dot com.	+	Please send your thoughts/comments to: kamran at wbitt dot com.

	This article is in relation to the article [[CENTOS Server CD project]]. I took some concepts from :		This article is in relation to the article [[CENTOS Server CD project]]. I took some concepts from :

Kamran at 22:22, 15 July 2010

2010-07-15T22:22:57Z

← Older revision		Revision as of 22:22, 15 July 2010
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		+	Please send your thoughts/comments on kamran at wbitt dot com.
		+
	This article is in relation to the article [[CENTOS Server CD project]]. I took some concepts from :		This article is in relation to the article [[CENTOS Server CD project]]. I took some concepts from :

Kamran: /* DONE */

2010-07-04T05:43:38Z

DONE

← Older revision		Revision as of 05:43, 4 July 2010
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	===DONE===		===DONE===
-	Here is the ~~text~~ from the newly installed VM. You can see that only ssh service is running, and the install size of the system is 701MB in total.	+	Here is some of the information from the newly installed VM. You can see that only ssh service is running, and the install size of the system is 701MB in total.

	<pre>		<pre>

Kamran: /* Test the stuff you just build (the bootable ISO image) */

2010-07-04T05:42:53Z

Test the stuff you just build (the bootable ISO image)

← Older revision		Revision as of 05:42, 4 July 2010
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-	[[File:Custom-cd-text-installer-small.png]] [[File:Custom-cd-gui-installer-1-small.png]] [[File:Custom-cd-gui-installer-2-small.png]] [[File:Custom-cd-gui-installer-3-small.png]]	+	[[File:Custom-cd-text-installer-small.png]]
		+
		+	[[File:Custom-cd-gui-installer-1-small.png]] [[File:Custom-cd-gui-installer-2-small.png]] [[File:Custom-cd-gui-installer-3-small.png]]

	===DONE===		===DONE===

Kamran: /* Test the stuff you just build (the bootable ISO image) */

2010-07-04T05:42:18Z

Test the stuff you just build (the bootable ISO image)

← Older revision		Revision as of 05:42, 4 July 2010
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-	[[File:Custom-cd-text-installer-small.png]]	+	[[File:Custom-cd-text-installer-small.png]] [[File:Custom-cd-gui-installer-1-small.png]] [[File:Custom-cd-gui-installer-2-small.png]] [[File:Custom-cd-gui-installer-3-small.png]]
-		+
-	[[File:Custom-cd-gui-installer-1-small.png]]	+
-		+
-	[[File:Custom-cd-gui-installer-2-small.png]]	+
-		+
-	[[File:Custom-cd-gui-installer-3-small.png]]	+

	===DONE===		===DONE===

Kamran: /* DONE */

2010-07-04T05:41:07Z

DONE

← Older revision		Revision as of 05:41, 4 July 2010
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	[root@custom-cd ~]#		[root@custom-cd ~]#
	</pre>		</pre>
		+
		+	The first thing, which you might want to do on this newly installed system is update it full, to bring it upto the latest version of kernel and the distribution. The benefit of such small installation is that the update will pull relatively less amount of packages, compared to a larger install. If you are connected to the internet, this should complete in minutes. Later, whatever packages you want to add, they will be pulled from the updates repository (if you have it configured that way).
		+
		+	<pre>
		+	[root@custom-cd ~]# yum -y update
		+	</pre>
		+
		+

	Note: If you want, you can further remove extra packages from the newly installed system. You can use the following as a guide line: [[Packages which can be removed after Core installation]] .		Note: If you want, you can further remove extra packages from the newly installed system. You can use the following as a guide line: [[Packages which can be removed after Core installation]] .

Kamran: /* Create Bootable ISO file */

2010-07-04T05:36:49Z

Create Bootable ISO file

← Older revision		Revision as of 05:36, 4 July 2010
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	256141 extents written (500 MB)		256141 extents written (500 MB)
	[root@buildhost CentOS-5.4-x86_64-core]#		[root@buildhost CentOS-5.4-x86_64-core]#
		+	</pre>
		+
		+	====Implant MD5SUM in the ISO file====
		+	The following will implant the ISO file's MD5 inside the ISO file itself.
		+
		+	<pre>
		+	[root@buildhost CentOS-5.4-x86_64-core]# implantisomd5 $isofilename
		+	Inserting md5sum into iso image...
		+	md5 = 48a3456517149f584ae81f793b933459
		+	Inserting fragment md5sums into iso image...
		+	fragmd5 = 6cae56578bb59bb8bd2289af35fa7c4f4468658de47f45e6d488be9b6b33
		+	frags = 20
		+	Setting supported flag to 0
		+	[root@buildhost CentOS-5.4-x86_64-core]#
	</pre>		</pre>

Kamran at 05:05, 4 July 2010

2010-07-04T05:05:47Z

← Older revision		Revision as of 05:05, 4 July 2010
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	# http://people.redhat.com/rkeech/custom-distro.txt , which is now totally out-dated.		# http://people.redhat.com/rkeech/custom-distro.txt , which is now totally out-dated.
	# http://greghaygood.com/2007/12/11/build-a-custom-centos-5-install-cd		# http://greghaygood.com/2007/12/11/build-a-custom-centos-5-install-cd
-	~~# http://cinq.com/2008/04/14/rebuilding-the-dvd-iso-for-centos-5-or-rhel-5/~~
-	~~# http://www.linuxjournal.com/article/6473?page=1,0~~

	Note: In recent versions of RedHat and CentOS, most of the steps/commands shown in link #1 above, are now taken care by a single "createrepo" command.		Note: In recent versions of RedHat and CentOS, most of the steps/commands shown in link #1 above, are now taken care by a single "createrepo" command.
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	Note: If you want, you can further remove extra packages from the newly installed system. You can use the following as a guide line: [[Packages which can be removed after Core installation]] .		Note: If you want, you can further remove extra packages from the newly installed system. You can use the following as a guide line: [[Packages which can be removed after Core installation]] .
		+
		+	===Further reading===
		+	# http://cinq.com/2008/04/14/rebuilding-the-dvd-iso-for-centos-5-or-rhel-5/
		+	# http://www.linuxjournal.com/article/6473?page=1,0
		+	# http://www-oss.fnal.gov/projects/fermilinux/common/anaconda.comps.html
		+	# http://fedoraproject.org/wiki/PackageMaintainers/CompsXml
		+	# http://createrepo.baseurl.org/
		+	# http://mirror.centos.org/centos/4/build/distro/build.sh.txt

Kamran: /* First, the setup */

2010-07-03T19:42:35Z

First, the setup

← Older revision		Revision as of 19:42, 3 July 2010
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	So what I did is, I simply created a small virtual machine, within my Fedora 11, which runs CentOS-5.4-x86_64. It is named <b>"buildhost"</b>. I assigned 1GB of RAM and 3 GB of diskspace to this virtual machine. I did not use more space, because, I wanted to use least amount of disk space, and kind of re-use the already prepared "build-tree" from the Fedora11 machine. What I did was export /data/cdimages from Fedora11 host using NFS and mounted that on /mnt/cdimages on the newly CentOS VM.		So what I did is, I simply created a small virtual machine, within my Fedora 11, which runs CentOS-5.4-x86_64. It is named <b>"buildhost"</b>. I assigned 1GB of RAM and 3 GB of diskspace to this virtual machine. I did not use more space, because, I wanted to use least amount of disk space, and kind of re-use the already prepared "build-tree" from the Fedora11 machine. What I did was export /data/cdimages from Fedora11 host using NFS and mounted that on /mnt/cdimages on the newly CentOS VM.

-	The directory <b>/data/cdimages</b>, on my Fedora machine, contains full install tree of original CENTOS 5.4 64 bit CD in <b>CENTOS-5.4-x86_64</b> subdirectory, and an empty <b>CENTOS-5.4-x86_64-core</b> (build) directory. When this directory is mounted on my buildhost, ~~ove nfs~~, the directory layout looks like the following:	+	The directory <b>/data/cdimages</b>, on my Fedora machine, contains full install tree of original CENTOS 5.4 64 bit CD in <b>CENTOS-5.4-x86_64</b> subdirectory, and an empty <b>CENTOS-5.4-x86_64-core</b> (build) directory. When this directory is mounted on my buildhost, over NFS, the directory layout looks like the following:

	<pre>		<pre>

Kamran: /* DONE */

2010-07-03T18:58:40Z

DONE

← Older revision		Revision as of 18:58, 3 July 2010
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	===DONE===		===DONE===
-	If you want, you can further remove extra packages from the newly installed system. You can use [[Packages which can be removed after Core installation]] ~~as guideline~~.	+	Here is the text from the newly installed VM. You can see that only ssh service is running, and the install size of the system is 701MB in total.
		+
		+	<pre>
		+	[kamran@kworkhorse cdimages]$ ssh root@192.168.122.61
		+	The authenticity of host '192.168.122.61 (192.168.122.61)' can't be established.
		+	RSA key fingerprint is a1:0e:0b:01:92:6a:69:14:e6:62:6d:83:6d:08:16:1d.
		+	Are you sure you want to continue connecting (yes/no)? yes
		+	Warning: Permanently added '192.168.122.61' (RSA) to the list of known hosts.
		+	root@192.168.122.61's password:
		+	Last login: Sat Jul 3 20:53:08 2010
		+
		+
		+	[root@custom-cd ~]# netstat -antp
		+	Active Internet connections (servers and established)
		+	Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
		+	tcp 0 0 :::22 :::* LISTEN 1736/sshd
		+	tcp 0 0 ::ffff:192.168.122.61:22 ::ffff:192.168.122.1:48069 ESTABLISHED 2154/0
		+
		+
		+	[root@custom-cd ~]# df -h
		+	Filesystem Size Used Avail Use% Mounted on
		+	/dev/hda1 2.7G 701M 1.9G 28% /
		+	tmpfs 250M 0 250M 0% /dev/shm
		+	[root@custom-cd ~]#
		+	</pre>
		+
		+	Note: If you want, you can further remove extra packages from the newly installed system. You can use the following as a guide line: [[Packages which can be removed after Core installation]] .