AddComputers.sh

#!/bin/bash

#This script will do the following based on the MACs.txt mac address provided in the same folder:
#Make a home directory.
#Add a system user assigned to home directory.
#Assign ownership to home directory.

#Set user's password.
#Add a corrosponding entry in '/var/lib/tftpboot/ltsp/i386/lts.conf'

#Set lts.conf to a default state.
#Any changes made to lts.conf need to be made here, or be overriden.
cat > /var/lib/tftpboot/ltsp/i386/lts.conf <<EOF
# http://manpages.ubuntu.com/manpages/maverick/en/man5/lts.conf.5.html

[default]
LDM_DIRECTX = TRUE
LDM_GUESTLOGIN = TRUE

VOLUME = 75
X_RAMPERC = 80

LANG = en_US.UTF-8
LANGUAGE = en_US.UTF-8

DNS_SERVER = 192.168.41.1
HOSTNAME_BASE = lava-lab-
HASTNAME_EXTRA = mac
TIMEZONE = GMT-7
TIMERSERVER = 192.168.41.1
SHUTDOWN_TIME = 16:00:00

SOUND = TRUE
SOUND_DAEMON = pulse
HEADPHONE_VOLUME = 75
FRONT_VOLUME = 0

EOF

#Define create_account() function.
#create_account() is called while looping through MACs.txt on each mac address.
create_account()
{
#user2 should be the full mac address passed to create_account()
user2=$1

#Test if user already exists
if getent passwd $user2 >/dev/null; then
    #user exists
    echo User Exists, skipping: $user2
else
    #user does not exists
    echo Creating home directory for user: $user2

    sudo mkdir /home/$user2 && sudo useradd $user2 -d /home/$user2 && sudo chown -R $user2 /home/$user2
    echo "$user2:PASSWORD" | sudo chpasswd
fi
}

create_account student-template

#loop through MACs.txt and perform actions on each mac, line by line.
cat MACs.txt \
| while read mac; do
    shortmac=`echo $mac | perl -pe 's/(..):(..):(..):(..):(..):(..)/$5$6/'`
    user=student-$shortmac

    cat >> /var/lib/tftpboot/ltsp/i386/lts.conf<<EOF
[$mac]
HOSTNAME = LHA-Student-LAB-$shortmac
LDM_USERNAME = $user
LDM_PASSWORD = PASSWORD
LDM_AUTOLOGIN = TRUE

EOF

    create_account $user
done

exit 0