install ssh pub key on remote machine

#!/bin/bash
function installDSAKeysOnTarget() {
    TARGET=$1
    if [ ! -f $HOME/.ssh/id_dsa.pub ]; then
        ssh-keygen -t dsa -f $HOME/.ssh/id_dsa -P '' 
    fi 
    PUBKEY=`cat $HOME/.ssh/id_dsa.pub`
    AUTH2_FILE='~/.ssh/authorized_keys2'

    # Setup the remote machine so that this node can log into it without error$
    ssh -o StrictHostKeychecking=no root@$TARGET "mkdir -p ~/.ssh; chmod 0700 ~/.ssh; if [ -z \"\$(grep \"$PUBKEY\" $AUTH2_FILE 2>/dev/null)\" ]; then echo $PUBKEY >> $AUTH2_FILE ; chmod 0644 $AUTH2_FILE; fi"
       
}