FAQ
How to run a production application on port other then 80.
In order to address security concerns, one might want to run application server on port other then 80, otherwise the appserver will have to be ran as
root which will create a potential security whole. Linux command
iptables can be used to redirect all requests from port 80 to let's say 8080 (default port for
tomcat or jetty). Here is an example
iptables command:
/sbin/iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 8080
How to automatically start the appserver when linux boots up.
Modify
/etc/rc.d/rc.local . Here is the example fragment of that file wich will execute
iptables command (see above), start
sshd and then will start
tomcat.
# custom changes **********************************************************
/sbin/iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 8080
/etc/init.d/sshd start
/bin/bash -c '. /etc/profile; cd /home/dev/opt/jakarta-tomcat-5.0.27/bin ; ./startup.sh '
# custom changes **********************************************************
Running Yum Manually
To see a list of available updates without installing anything, use yum check-update
To initiate a complete update session for all installed packages on your system, you simply can omit the last argument, the package specification: yum update.
There are some useful linux
links.
http://pingability.com
