The OLPC server software releases are designated as OLPC_XS-0.x. OLE Nepal needs to build a custom configuration of the XS that meets the needs of our schools. These releases will are designated as NEXS-m.n (short style) or NEXS_0.x-m.n to show the OLPC XS release on which it is based.

The current OLPC release is OLPC_XS-0.4 to be followed very shortly by OLPC_XS-0.5. The former is based on Fedora 7 and the latter on Fedora 9.

We currently plan a release NEXS_0.4-1.4. A release which ends in an even number is considered stable and available for installation. This document describes the procedure for building NEXS_0.4-1.3 from OLPC_XS-0.4. The release ends in an odd number to show that it is still under test. When testing is completed, it will be re-designated as NEXS_0.4-1.4.

Our next release will be NEXS_0.5-1.6. The primary difference in these two releases will be the move to Fedora 9. It is also expected that the OLPC XS-0.5 will incorporate MySQL and Moodle so that we will no longer need to add these ourselves.

Copy OLPC_XS-0.4.iso and other packages to the local fileserver

We need the base iso image to be on our local fileserver (fileserver/ole_storage/software/schoolserver) so that in the case of problems we can go back to the source. In addition this folder contains the other packages which were needed to build NEXS: dansguardian, mysql, and moodle.

OLPC_XS-0.4

Download XS iso and md5 files to the OLENepal fileserver/ole_storage/Software/schoolserver/XS/XS-0.x folder:

 wget http://xs-dev.laptop.org/xs/OLPC_XS_0_4.iso 
 md5sum OLPC_XS_0_4.iso > OLPC_XS_0_4.iso.md5
 mkdir smb://fileserver/ole_storage/Software/schoolserver/XS/XS_0_4
 cp OLPC_XS_0.4.iso smb://fileserver/ole_storage/Software/schoolserver/XS/XS_0_4

Note: currently the md5 checksum for the iso file is not given at http://xs-dev.laptop.org/xs/. It would be better to verify the download of the iso file against an md5 checksum created by the developer. However, this test will confirm that a copy from the fileserver is correct.

Dansguardian

Download Dansguardian to the fileserver.

 wget http://mirrors.evis.net.ph/downloads/2/Stable/dansguardian-2.10.tar.gz

MySQL

 wget http://mysql.thaiweb.net/Downloads/MySQL-5.0/MySQL-server-community-5.0.67-0.rhel5.i386.rpm
 MD5: 99dcde3e08536a35d42cb939195def9f
 wget http://mysql.thaiweb.net/Downloads/MySQL-5.0/MySQL-shared-community-5.0.67-0.rhel5.i386.rpm
 MD5: bc1f85b62c6bd9ec2b0dc8658d89c16e
 wget http://mysql.thaiweb.net/Downloads/MySQL-5.0/MySQL-client-community-5.0.67-0.rhel5.i386.rpm
 MD5: 7dfbb1e9e3c8ee7bd5abda8d620c2507

Moodle

 wget http://download.moodle.org/stable19/moodle-weekly-19.tgz

Set up development environment

 The Fedora system used to build NEXS must have some development tools installed:

 yum -y install squashfs-tools livecd-tools
 yum -y install gcc automake bison autoconf gcc-c++ binutils cscope zlib-devel pcre-devel patchutils

Procedure to make revised iso image

This procedure allows changes to the kickstart file and to the packages included in the NEXS iso image.

 mkdir temp
 cd temp
 mkdir XSiso
 mount -o loop OLPC_XS_0.4.iso XSiso
 unsquashfs XSiso/LiveOS/squashfs.img
 mkdir livecd-root
 mount -o loop,rw squashfs-root/LiveOS/os.img livecd-root

now make changes as needed

 umount livecd-root
 mv squashfs.img squashfs.img.orig
 mksquashfs squashfs-root squashfs.img
 mkdir NEXSiso
 rsync -av --exclude=śquashfs.img' XSiso NEXSiso
 mv squashfs.img NEXSiso/LiveOS
 umount XSiso

Additions/Changes to packages in XS required to make NEXS

How to NEXS server ISO

This how to describes the process of creating a customized version of OLCP XS server from the original iso.This new iso can contain extra softwares that we cannot find in the standard distribution of OLPC XS.

Step 1: Download the iso image and other necessary files from the SAMBA share hosted in our internal LAN :

-> Go to OLE_storate and download the nexs-files directory to your local hard drive

step 2: Check for the necessary files :

root@localhost~# cd nexs-files

root@localhostnexs-files# ls alldb.sql apache.tar.bz2 blacklist.tar.bz2 httpd.conf install.sh OLPC_XS_0_4.iso rc.local squashfs-process XSinstall

root@localhostnexs-files# pwd /root/nexs-files

Step 3: Install related tools and then mount the iso image with the help of the loop back device :

root@localhostwork# yum -y install squashfs-tools livecd-tools

root@localhostnexs-files# mkdir /mnt/t

root@localhostnexs-files# mount -o loop,ro -t iso9660 OLPC_XS_0_4.iso /mnt/t

root@localhostnexs-files# mount /dev/sda2 on / type ext3 (rw) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) /dev/sda1 on /boot type ext3 (rw) tmpfs on /dev/shm type tmpfs (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw) /root/nexs-files/OLPC_XS_0_4.iso on /mnt/t type iso9660 (ro,loop=/dev/loop0)

Step 3: Get inside the /mnt/t directory to see the contents of the iso

root@localhostnexs-files# cd /mnt/t root@localhostt# ls isolinux squashfs.img sysroot

step 4: copy the contents of all the /mnt/t i.e the mounted iso images to a new location preserving the file permissions and unsquash the squashfs filesystem:

root@localhostt# mkdir /root/work root@localhostt# cp -varf /mnt/t/* /root/work/ `/mnt/t/isolinux' -> `/root/work/isolinux' `/mnt/t/isolinux/boot.cat' -> `/root/work/isolinux/boot.cat' `/mnt/t/isolinux/initrd.img' -> `/root/work/isolinux/initrd.img' `/mnt/t/isolinux/isolinux.bin' -> `/root/work/isolinux/isolinux.bin' `/mnt/t/isolinux/isolinux.cfg' -> `/root/work/isolinux/isolinux.cfg' `/mnt/t/isolinux/splash.jpg' -> `/root/work/isolinux/splash.jpg' `/mnt/t/isolinux/vesamenu.c32' -> `/root/work/isolinux/vesamenu.c32' `/mnt/t/isolinux/vmlinuz' -> `/root/work/isolinux/vmlinuz' `/mnt/t/squashfs.img' -> `/root/work/squashfs.img' `/mnt/t/sysroot' -> `/root/work/sysroot'

root@localhostt# cd /root/work

root@localhostt# cd /root/work/ root@localhostwork# ls isolinux squashfs.img sysroot root@localhostwork# unsquashfs squashfs.img

created 1 files created 2 directories created 0 symlinks created 0 devices created 0 fifos

root@localhostwork#

root@localhostwork# ls isolinux squashfs.img squashfs-root sysroot

- - - Make sure that you have a new directory called squashfs-root

step 5: mount the os.img file in a new directory of your choice :

root@localhostsquashfs-root# mkdir /mnt/os root@localhostsquashfs-root# mount -o loop,rw os.img /mnt/os root@localhostsquashfs-root# cd /mnt/os

step 6: copy all the necessary files to /mnt/os/root directory

root@localhostos# cd /mnt/os/root

root@localhostroot# ls anaconda-ks.cfg olpc-install

root@localhostroot# cp -varf /root/nexs-files/ alldb.sql blacklist.tar.bz2 install.sh rc.local XSinstall apache.tar.bz2 httpd.conf OLPC_XS_0_4.iso squashfs-process

root@localhostroot# cp -varf /root/nexs-files/alldb.sql . `/root/nexs-files/alldb.sql' -> `./alldb.sql' root@localhostroot# cp -varf /root/nexs-files/blacklist.tar.bz2 . `/root/nexs-files/blacklist.tar.bz2' -> `./blacklist.tar.bz2' root@localhostroot# cp -varf /root/nexs-files/install.sh . `/root/nexs-files/install.sh' -> `./install.sh' root@localhostroot# cp -varf /root/nexs-files/rc.local . `/root/nexs-files/rc.local' -> `./rc.local' root@localhostroot# cp -varf /root/nexs-files/XSinstall . `/root/nexs-files/XSinstall' -> `./XSinstall' root@localhostroot# cp -varf /root/nexs-files/apache.tar.bz2 . `/root/nexs-files/apache.tar.bz2' -> `./apache.tar.bz2' root@localhostroot# cp -varf /root/nexs-files/httpd.conf . `/root/nexs-files/httpd.conf' -> `./httpd.conf'

root@localhostroot# ls alldb.sql anaconda-ks.cfg apache.tar.bz2 blacklist.tar.bz2 httpd.conf install.sh olpc-install rc.local XSinstall

root@localhostroot# cd

step 7: Chroot inside the /mnt/os directory

root@localhost~# chroot /mnt/os /bin//bash

[root@localhost /]# mount /proc

[root@localhost /]# mount /sys

- Make sure that /proc and /sys are mounted to do so issue the following command :

[root@localhost /]# mount /dev/mapper/livecd-rw on / type ext3 (rw,noatime) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw)

[root@localhost /]# ls bin boot dev etc home lib library lost+found media mnt opt proc root sbin selinux srv sys tmp usr var [root@localhost /]# cd /root/ [root@localhost ~]# ls alldb.sql anaconda-ks.cfg apache.tar.bz2 blacklist.tar.bz2 httpd.conf install.sh olpc-install rc.local XSinstall [root@localhost ~]# ls

Step 8: Make sure that you have changed the /etc/resolv.conf and that we can ping the internet :

[root@localhost ~]# cat /etc/resolv.conf nameserver 18.72.0.3 nameserver 4.2.2.4

[root@localhost ~]# echo nameserver 192.168.5.1 > /etc/resolv.conf

[root@localhost ~]# ping www.google.com PING www.l.google.com (209.85.165.99) 56(84) bytes of data. 64 bytes from eo-in-f99.google.com (209.85.165.99): icmp_seq=1 ttl=232 time=286 ms 64 bytes from eo-in-f99.google.com (209.85.165.99): icmp_seq=2 ttl=232 time=285 ms

--- www.l.google.com ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 2345ms rtt min/avg/max/mdev = 285.766/285.918/286.071/0.556 ms

Step 8 : Cusomize your distribution by adding softwares ; here we will be adding only few related softwares :

8.1 Install some rpms : [root@localhost ~]# yum -y install gcc automake bison autoconf gcc-c++ binutils cscope mysql-server php-mysql zlib-devel pcre-devel patchutils

8.2 Configure apache and moodle : [root@localhost ~]# cat httpd.conf > /etc/httpd/conf/httpd.conf 8.3 Unzip the moodle and moodle data : [root@localhost ~]# tar jxpf apache.tar.bz2 [root@localhost ~]# ls alldb.sql anaconda-ks.cfg apache.tar.bz2 blacklist.tar.bz2 httpd.conf install.sh olpc-install rc.local var XSinstall

8.4 Copy the moodle and moodledata to a new place : [root@localhost ~]# \cp -varf var/www/* /var/www/ [root@localhost ~]# cd /var/www/ [root@localhost www]# ls cgi-bin ds-backup error html icons manual moodle moodledata [root@localhost www]# cd moodle [root@localhost moodle]# ls admin blocks config-dist.php enrol files group install lang manifest.txt mod pix rss tag user auth blog config.php error filter help.php install.php lib message my question search tags userpix backup calendar course file.php grade index.php iplookup login mnet notes README.txt sso theme version.php [root@localhost moodle]# cd .. [root@localhost www]# cd moodle [root@localhost moodle]# ls admin blocks config-dist.php enrol files group install lang manifest.txt mod pix rss tag user auth blog config.php error filter help.php install.php lib message my question search tags userpix backup calendar course file.php grade index.php iplookup login mnet notes README.txt sso theme version.php [root@localhost moodle]#

8.5 Modify Mysql databases

[root@localhost ~]# /etc/init.d/mysqld start

[root@localhost ~]# mysql -u root -p < /root/alldb.sql

[root@localhost ~]# /etc/init.d/mysqld stop

8.6 Change moodle password

[root@localhost /]# mysqld_safe --skip-grant-table & mysql> use mysql; mysql> update user set password=PASSWORD("mysqlroot") where user="root"; mysql> update user set password=PASSWORD("moodle") where user="moodle"; mysql> exit [root@localhost /]# killall mysqld [root@localhost /]# killall mysqld

8.7 Make sure that permission on the /var/www/ directory is correct [root@localhost /]# chown apache: -R /var/www/

9. Installing dansguardian

[root@localhost /]# cd /usr/local/src [root@localhost src]# wget http://dansguardian.org/downloads/2/Stable/dansguardian-2.10.tar.gz [root@localhost src]# tar zxvp dansguardian-2.10.tar.gz [root@localhost src]# cd dansguardian-2.10 [root@localhost dansguardian-2.10]# ./configure --sysconfdir=/etc [root@localhost dansguardian-2.10]# make && make install [root@localhost dansguardian-2.10]# touch /usr/local/var/log/dansguardian/access.log [root@localhost dansguardian-2.10]# chown nobody: -R /usr/local/var/log/dansguardian//access.log

Open up the dansguardian config file: [root@localhost dansguardian-2.10]# vim /etc/dansguardian/dansguardian.conf

Change the filterport to 8081

 filterport = 12121

Change the weightedphrasemode to 1

 weightedphrasemode = 1

Save and quit the Vi editor

[root@localhost lists]# cd /etc/dansguardian/lists [root@localhost lists]# cp -varf /root/blacklist.tar.bz2 . [root@localhost blacklists]# tar jxpf blacklist.tar.bz2

[root@localhost dansguardian]# vim /etc/dansguardian/lists/bannedsitelist Uncommnet all lines EXCEPT the follwing (leave them as it is and don't remove the pound sign infront of these lines)

.Include</etc/dansguardian/lists/blacklists/forums/domains>
.Include</etc/dansguardian/lists/blacklists/onlinegames/domains>
.Include</etc/dansguardian/lists/blacklists/personalfinance/domains>
.Include</etc/dansguardian/lists/blacklists/pets/domains>
.Include</etc/dansguardian/lists/blacklists/publicite/domains>
.Include</etc/dansguardian/lists/blacklists/redirector/domains>
.Include</etc/dansguardian/lists/blacklists/ringtones/domains>
.Include</etc/dansguardian/lists/blacklists/sportnews/domains>
.Include</etc/dansguardian/lists/blacklists/sports/domains>

Save and quit the Vi editor

[root@localhost dansguardian]# vim /etc/dansguardian/lists/urlregexplist Press shift and ; and type set nu and then press enter to show line nubers in the Vi Uncomment the lines related to google safe search 13 "(^http://[0-9a-z]+\.google\.[a-z]+[-/%.0-9a-z]*/images\?)(.*)(&?)(safe=[^&]*)"->"\1\2\3" 15 "(^http://[0-9a-z]+\.google\.[a-z]+[-/%.0-9a-z]*/images\?)"->"\1safe=vss&" 43 "^http://[.0-9a-z]+\.yahoo\.[a-z]+[-/%.0-9a-z]*/search)(.*)(&?)(vm=[^&]*)"->"\1\2\3" 44 "(^http://[.0-9a-z]+\.yahoo\.[a-z]+[-/%.0-9a-z]*/search+.*\?)"->"\1vm=r&"

Save and quit the Vi editor

10. Making squid run in the mounted enviroment for testing :

[root@localhost dansguardian]# cd /etc/squid/ [root@localhost squid]# cp squid-xs.conf.in squid-xs.conf [root@localhost squid]# vim squid-xs.conf Comment out the line 44.Now it should look like this

append_domain .@@BASEDNSNAME@@

Save and quit the editor Make the squid cache director and set correct permissions [root@localhost squid]# mkdir /library/cache [root@localhost squid]# chown squid:squid /library/cache [root@localhost squid]# squid -z -f /etc/squid/squid-xs.conf [root@localhost squid]# squid -z -f /etc/squid/squid-xs.conf [root@localhost squid]# /etc/init.d/squid restart Stopping squid: [FAILED] Starting squid: [ OK ] [root@localhost squid]#

Run dansguardian : [root@localhost squid]# dansguardian -Q

If everything is fine then we can proceed :

[root@localhost squid]# /etc/init.d/squid stop [root@localhost squid]# killall danguardian

11. Open up /etc/rc.local file and make changes to it so that it looks like the following :

!/bin/bash
This script will be executed *after* all the other init scripts.
You can put your own initialization stuff in here if you don't
want to do the full Sys V style init stuff.

touch /var/lock/subsys/local sh /root/olpc-install sh /root/install.sh

Save and quit the editor

12. Configuring ejabberd

12.1 In the SERVED HOSTNAMES section make sure that you have a line that reads :

{hosts, ["localhost","schoolserver"]}.

12.2 If you have only IPV4 available then make sure that you delete the line containing the keyword inet6 for different sections. For example if you have section like this which enables old SSL based connection to the ejabberd :

{5223, ejabberd_c2s, [

                       inet6,
                       {access, c2s},
                       {shaper, c2s_shaper},
                       tls, {certfile, "/etc/ejabberd/ejabberd.pem"},
                       {max_stanza_size, 524288}
                      ]},

You have to delete the line containing inet6 so that it reads :

{5223, ejabberd_c2s, [

                       {access, c2s},
                       {shaper, c2s_shaper},
                       tls, {certfile, "/etc/ejabberd/ejabberd.pem"},
                       {max_stanza_size, 524288}
                      ]},

12.3 In ACCESS CONTROL LISTS section add a new admin user :

{acl, admin, {user, "admin","schoolserver" }}. {acl, admin, {user, "admin","localhost" }}.

12.4 Restart ejabberd

[root@localhost]# service ejabberd restart

12.4 Register the admin user :

[root@localhost ~]# ejabberdctl ejabberd@schoolserver register admin schoolserver admin

12.5 Now you can manage the ejabberd daemon via web interface. Open the following URL in the browser :

http://ip.of.your.server:5280/admin or use elinks text based browser

Enter User Name admin and password as admin (we configured this in the section 12.4)

12.6 Make sure that the XOs can now login to the ejabberd and can start the chat ; whenever a XO registers itself with the XS server ; a sqlite database file identity.db is updated which is located in the /home/idmgr. You can list the contents of this Database by issuing the following command :

[root@localhost idmgr]# /home/idmgr/list_registration

Listing students from /home/idmgr/identity.db tony CSN7480103A Arjun SHF8060097D

13. Make changes to /root/anaconda-ks.cfg so that it looks like the following :

[root@localhost ~]# cat anaconda-ks.cfg

Kickstart file for installing a school server

For now, due to anaconda bug #243374

install lang en_US.UTF-8 keyboard us skipx

xconfig --startxonboot

network --device eth0 --bootproto dhcp --hostname schoolserver rootpw --iscrypted $1$Bf0Ag93M$weSucLBipI6jTjtolgZE61 firewall --enabled authconfig --enableshadow --enablemd5

selinux --permissive

selinux --disabled

timezone --utc America/New_York

bootloader --location=mbr --driveorder=sda --append="rhgb quiet"

The following is the partition information you requested
Note that any partitions you deleted are not expressed
here so unless you clear all partitions first, this is
not guaranteed to work

clearpart --linux --drives=sda

Small Disk Support: (xs #7241)
If space >~10GiB then the sizes are
/boot 100 MiB
/ 8 GiB
swap 2 GiB
/library fills all remaining capicity
If space is limited, partition sizes are reduced.
Smallest supported capacity is ~5GiB when no livecd-creator --uncompressed-size argument is
specified (defaults to 4096).
Using livecd-creator --uncompressed-size=2048 allows installation on ~3GiB disks (not tested yet).

part /boot --fstype ext3 --size=100 --ondisk=sda part / --fstype ext3 --size=2048 --maxsize=8192 --grow --ondisk=sda

size of pv.6 must be at least enough to fit /library size and swap size

part pv.6 --size=1025 --grow --ondisk=sda volgroup VolGroup00 --pesize=32768 pv.6

Kickstart raises an error if logvol --size=0

logvol /library --fstype ext3 --name=LogVol00 --vgname=VolGroup00 --size=1 --grow logvol swap --fstype swap --name=LogVol01 --vgname=VolGroup00 --size=1024 --maxsize=2048 --grow reboot

13. Delete unnecesary files : [root@localhost ~]# rm -rf alldb.sql apache.tar.bz2 blacklist.tar.bz2 httpd.conf rc.local var XSinstall [root@localhost ~]# rm -rf /httpd.conf

14. Make sure that squid doesnot start at the boot time : [root@localhost src]# chkconfig squid off

15. Get out of the chroot enviroment : [root@localhost ~]# exit [root@localhost ~]# umount /proc [root@localhost ~]# umount /sys [root@localhost ~]# exit

16. Umount the os.img file root@localhost~# umount /mnt/os

16. Make new squashfs.img and then the Bootable ISO:

root@localhost# cd /root/work/ root@localhost# rm -rf rm -rf /root/work/squashfs.img root@localhost# mksquashfs squashfs-root squashfs.img root@localhost# mv squashfs-root ../

The content of /root/work directory must be like this one :

root@localhostwork# ls isolinux squashfs.img sysroot

To create a bootable iso use the following command : root@localhostoriginal-iso-mounted# mkisofs -o ./live.iso -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -J -r -hide-rr-moved -V "OLPC_XS_0_4" .

Please don't miss the dot at the end of the command

root@localhostwork# ls isolinux live.iso squashfs.img sysroot

17. Transferring the iso image to a flash disk : Mount the flash drive ; I am assuming that the drive is /dev/sdd and has a bootable flag turned on for the primary partition i.e /dev/sdd1 To make this flash drive bootable use the following command :

root@localhost# livecd-iso-to-disk ./live.iso /dev/sdd1

Once done unmount the iso image and you are done.

[root@schoolserver ~]# ejabberdctl ejabberd@schoolserver register admin schoolserver admin

How to NEXS server ISO

This how to describes the process of creating a customized version of OLCP XS server from the original iso.This new iso can contain extra softwares that we cannot find in the standard distribution of OLPC XS.

Step 1: Download the iso image and other necessary files from the SAMBA share hosted in our internal LAN :

-> Go to OLE_storate and download the nexs-files directory to your local hard drive

step 2: Check for the necessary files :

root@localhost~# cd nexs-files

root@localhostnexs-files# ls alldb.sql apache.tar.bz2 blacklist.tar.bz2 httpd.conf install.sh OLPC_XS_0_4.iso rc.local squashfs-process XSinstall

root@localhostnexs-files# pwd /root/nexs-files

Step 3: Install related tools and then mount the iso image with the help of the loop back device :

root@localhostwork# yum -y install squashfs-tools livecd-tools

root@localhostnexs-files# mkdir /mnt/t

root@localhostnexs-files# mount -o loop,ro -t iso9660 OLPC_XS_0_4.iso /mnt/t

root@localhostnexs-files# mount /dev/sda2 on / type ext3 (rw) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) /dev/sda1 on /boot type ext3 (rw) tmpfs on /dev/shm type tmpfs (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw) /root/nexs-files/OLPC_XS_0_4.iso on /mnt/t type iso9660 (ro,loop=/dev/loop0)

Step 3: Get inside the /mnt/t directory to see the contents of the iso

root@localhostnexs-files# cd /mnt/t root@localhostt# ls isolinux squashfs.img sysroot

step 4: copy the contents of all the /mnt/t i.e the mounted iso images to a new location preserving the file permissions and unsquash the squashfs filesystem:

root@localhostt# mkdir /root/work root@localhostt# cp -varf /mnt/t/* /root/work/ `/mnt/t/isolinux' -> `/root/work/isolinux' `/mnt/t/isolinux/boot.cat' -> `/root/work/isolinux/boot.cat' `/mnt/t/isolinux/initrd.img' -> `/root/work/isolinux/initrd.img' `/mnt/t/isolinux/isolinux.bin' -> `/root/work/isolinux/isolinux.bin' `/mnt/t/isolinux/isolinux.cfg' -> `/root/work/isolinux/isolinux.cfg' `/mnt/t/isolinux/splash.jpg' -> `/root/work/isolinux/splash.jpg' `/mnt/t/isolinux/vesamenu.c32' -> `/root/work/isolinux/vesamenu.c32' `/mnt/t/isolinux/vmlinuz' -> `/root/work/isolinux/vmlinuz' `/mnt/t/squashfs.img' -> `/root/work/squashfs.img' `/mnt/t/sysroot' -> `/root/work/sysroot'

root@localhostt# cd /root/work

root@localhostt# cd /root/work/ root@localhostwork# ls isolinux squashfs.img sysroot root@localhostwork# unsquashfs squashfs.img

created 1 files created 2 directories created 0 symlinks created 0 devices created 0 fifos

root@localhostwork#

root@localhostwork# ls isolinux squashfs.img squashfs-root sysroot

- - - Make sure that you have a new directory called squashfs-root

step 5: mount the os.img file in a new directory of your choice :

root@localhostsquashfs-root# mkdir /mnt/os root@localhostsquashfs-root# mount -o loop,rw os.img /mnt/os root@localhostsquashfs-root# cd /mnt/os

step 6: copy all the necessary files to /mnt/os/root directory

root@localhostos# cd /mnt/os/root

root@localhostroot# ls anaconda-ks.cfg olpc-install

root@localhostroot# cp -varf /root/nexs-files/ alldb.sql blacklist.tar.bz2 install.sh rc.local XSinstall apache.tar.bz2 httpd.conf OLPC_XS_0_4.iso squashfs-process

root@localhostroot# cp -varf /root/nexs-files/alldb.sql . `/root/nexs-files/alldb.sql' -> `./alldb.sql' root@localhostroot# cp -varf /root/nexs-files/blacklist.tar.bz2 . `/root/nexs-files/blacklist.tar.bz2' -> `./blacklist.tar.bz2' root@localhostroot# cp -varf /root/nexs-files/install.sh . `/root/nexs-files/install.sh' -> `./install.sh' root@localhostroot# cp -varf /root/nexs-files/rc.local . `/root/nexs-files/rc.local' -> `./rc.local' root@localhostroot# cp -varf /root/nexs-files/XSinstall . `/root/nexs-files/XSinstall' -> `./XSinstall' root@localhostroot# cp -varf /root/nexs-files/apache.tar.bz2 . `/root/nexs-files/apache.tar.bz2' -> `./apache.tar.bz2' root@localhostroot# cp -varf /root/nexs-files/httpd.conf . `/root/nexs-files/httpd.conf' -> `./httpd.conf'

root@localhostroot# ls alldb.sql anaconda-ks.cfg apache.tar.bz2 blacklist.tar.bz2 httpd.conf install.sh olpc-install rc.local XSinstall

root@localhostroot# cd

step 7: Chroot inside the /mnt/os directory

root@localhost~# chroot /mnt/os /bin//bash

[root@localhost /]# mount /proc

[root@localhost /]# mount /sys

- Make sure that /proc and /sys are mounted to do so issue the following command :