Single quotes

install-freedombone.sh

   fi
 
   apt-get -y --force-yes install duplicity
-  
+
   if ! grep -q "backups on friends servers" /home/$MY_USERNAME/README; then
       echo '' >> /home/$MY_USERNAME/README
       echo '' >> /home/$MY_USERNAME/README
   echo '# Generate an ssh key used for encrypting backups' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
   echo "if [ ! -f /root/backupkey ]; then" >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
   echo '  ssh-keygen -t rsa -f /root/backupkey -q -N ""' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
-  echo '  sed -i "s/-----BEGIN RSA PRIVATE KEY-----//g" /root/backupkey' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME 
-  echo '  sed -i "s/-----END RSA PRIVATE KEY-----//g" /root/backupkey' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME 
-  echo '  sed -i "s/==//g" /root/backupkey' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME 
+  echo '  sed -i "s/-----BEGIN RSA PRIVATE KEY-----//g" /root/backupkey' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo '  sed -i "s/-----END RSA PRIVATE KEY-----//g" /root/backupkey' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo '  sed -i "s/==//g" /root/backupkey' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
   echo '  chmod 400 /root/backupkey' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
   echo '  rm /root/backupkey.pub' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
   echo 'fi' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
   echo '' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
 
   echo '# Passphrase is the ssh private key' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
-  echo "PASSPHRASE=$(</root/backupkey)" >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo 'PASSPHRASE=$(</root/backupkey)' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
   echo '' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
   echo "if [ ! -f $FRIENDS_SERVERS_LIST ]; then" >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
   echo '    exit 1' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
   echo '' >> /usr/bin/$RESTORE_FROM_FRIEND_SCRIPT_NAME
 
   echo '# Check that a backup key exists' >> /usr/bin/$RESTORE_FROM_FRIEND_SCRIPT_NAME
-  echo "if [ ! -f /root/backupkey ]; then" >> /usr/bin/$RESTORE_FROM_FRIENDS_SCRIPT_NAME
+  echo 'if [ ! -f /root/backupkey ]; then' >> /usr/bin/$RESTORE_FROM_FRIENDS_SCRIPT_NAME
   echo '  echo "No backup key was found in /root/backupkey"' >> /usr/bin/$RESTORE_FROM_FRIEND_SCRIPT_NAME
   echo '  exit 84' >> /usr/bin/$RESTORE_FROM_FRIEND_SCRIPT_NAME
   echo 'fi' >> /usr/bin/$RESTORE_FROM_FRIEND_SCRIPT_NAME
   echo '' >> /usr/bin/$RESTORE_FROM_FRIEND_SCRIPT_NAME
 
-  echo "PASSPHRASE=$(</root/backupkey)" >> /usr/bin/$RESTORE_FROM_FRIEND_SCRIPT_NAME
+  echo 'PASSPHRASE=$(</root/backupkey)' >> /usr/bin/$RESTORE_FROM_FRIEND_SCRIPT_NAME
   echo '' >> /usr/bin/$RESTORE_FROM_FRIEND_SCRIPT_NAME
   echo 'if [ ! $SERVER_NAME ]; then' >> /usr/bin/$RESTORE_FROM_FRIEND_SCRIPT_NAME
   echo "    echo '$RESTORE_FROM_FRIEND_SCRIPT_NAME [server]'" >> /usr/bin/$RESTORE_FROM_FRIEND_SCRIPT_NAME