Solaris Express Installation Guide: Custom JumpStart and Advanced Installations

Setting a System's Root Password With a Finish Script

After the Solaris software is installed on a system, the system reboots. Before the boot process is completed, the system prompts for the root password. Until someone types a password, the system cannot finish booting.

A finish script that is named set_root_pw is saved in the auto_install_sample directory. The finish script shows how to set the root password automatically, without prompting. set_root_pw is shown in Example 4–6.

Note –

If you set the system's root password with a finish script, users might attempt to discover the root password from the encrypted password in your finish script. Ensure that you safeguard against users who might try to determine the root password.

Example 4–6 Setting the System's Root Password With a Finish Script

	 #       @(#)set_root_pw 1.4 93/12/23 SMI
	 # This is an example Bourne shell script to be run after installation.
	 # It sets the system's root password to the entry defined in PASSWD.
	 # The encrypted password is obtained from an existing root password entry
	 # in /etc/shadow from an installed machine.
	 echo "setting password for root"
	 # set the root password
	 #create a temporary input file
 cp /a/etc/shadow /a/etc/shadow.orig
	 mv /a/etc/shadow /a/etc/shadow.orig
 	nawk -F: '{
         if ( $1 == "root" )
      }' passwd="$PASSWD" /a/etc/shadow.orig > /a/etc/shadow
 #remove the temporary file
 rm -f /a/etc/shadow.orig
 # set the flag so sysidroot won't prompt for the root password
 sed -e 's/0 # root/1 # root/' ${SI_SYS_STATE} > /tmp/state.$$
  mv /tmp/state.$$ ${SI_SYS_STATE}

The following describes some of the commands in this example.