Ubuntu 9.10 PXE Boot

Posted in Networking, Services on November 16th, 2009 by termina

Ubuntu 9.10 uses initrd.lz instead of initrd.gz, so PXE booting like you did in previous versions does not work.

This article assumes you’ve already downloaded the iso and have a working PXE boot server.

First, copy the contents of the iso to a directory we can work with

mkdir /tmp/910

mount -o loop ubuntu-9.10-desktop-i386.iso /tmp/910

cp -r /tmp/910 /tftpboot

Convert initrd.lz to initrd.gz

cd /tftpboot/910/casper

mkdir initrd

cp initrd.lz initrd

cd initrd

lzma -dc -S .lz initrd.lz | cpio -id

rm initrd.lz

find . | cpio –quiet –dereference -o -H newc | gzip -9 > initrd.gz

cp initrd.gz /tftpboot/910/casper

Now add the appropriate lines to pxelinux (Example: /tftpboot/pxelinux.cfg/default)

LABEL Ubuntu 9.10 i386 Unmodified Livecd
KERNEL 910/casper/vmlinuz
APPEND root=/dev/nfs boot=casper netboot=nfs nfsroot= initrd=910/casper/initrd.gz quiet splash --

Make sure /tftpboot is shared via nfs; in /etc/exports add the following line


Reload the NFS server

/etc/init.d/nfs-kernel-server reload

OpenSolaris LDAP Client to Linux OpenLDAP Server

Posted in Networking, Security, Services on November 13th, 2009 by termina

The following outlines how to set up a OpenSolaris client to work with a Linux OpenLDAP server.

The following is one line

ldapclient manual -a credentialLevel=proxy -a authenticationMethod=simple -a proxyDN=cn=admin,dc=server -a proxyPassword=yourpassword -a defaultSearchBase=dc=server -a defaultServerList= -a serviceSearchDescriptor=passwd:ou=People,dc=server -a

Add the following lines to their appropriate sections in /etc/pam.conf

login   auth required           pam_ldap.so.1
other   auth required           pam_ldap.so.1
passwd  auth required         pam_ldap.so.1

Test LDAP with

ldaplist -l passwd

Test user authentication using the following steps

mkdir /export/home/ldapuser

chown ldapuser /export/home/ldapuser

Edit /etc/auto_home and add the following BEFORE “+auto_home”

ldapuser localhost:/export/home/ldapuser

SSH to test

ssh [email protected]

You should be in! If not, you may have to change the following in /etc/ssh/sshd_config

PAMAuthenticationViaKBDInt no

#Change from yes to no

Restart SSH

svcadm restart ssh

If you are still unable to log in, your userPassword attribute probably needs to be changed from md5/md5crypt to crypt.

su – ldapuser


After changing your password you should be able to log in.