Kill processes with UID > 1024.

kill_high_uids.sh

#!/bin/sh

MAX_PROTECTED_UID=1024

ps auxn | tail -n +2 | while read uid pid process; do
    if [ "$uid" -gt "$MAX_PROTECTED_UID" ]; then
        kill $pid
        if ps $pid > /dev/null; then
            kill -9 $pid
        fi
    fi
done