Advanced ( Expert) Linux / Unix System Administrator

These tutorials assumes that you have rock solid understanding of Unix like operating systems and very comfortable with most aspects of the Unix/Linux such as networking/distributed computing environments,routing, firewalls, servers, client/server programming, and the design of consistent network-wide filesystems, load-balancers, security and much more. ( rss feed )

I know how to setup a firewall under RHEL / Fedora and CentOS Linux quickly. How do I setup a host-based firewall under Debian or Ubuntu Linux server or desktop system? How do I install Shoreline firewall (Shorewall) utility to build firewall based on the Netfilter under Debian or Ubuntu Linux?


There is no excerpt because this is a protected post.


I‘ve installed an usb image on Pen drive along with MBR. Now, I need to use this USB pen for other purpose. Is there a way in Linux to delete the mbr (just like dos fdisk /mbr command)?


I‘ve 10Mbps server port dedicated to our small business server. The server also act as a backup DNS server and I’d like to slow down outbound traffic on port 80. How do I limit bandwidth allocation to http service 5Mbps (burst to 8Mbps) at peak times so that DNS and other service will not go down due to heavy activity under a Linux operating systems?


How do I setup jumbo frames under IBM AIX operating systems using command line tools?


I‘d like to tell my Linux iptables firewall to flush out the current configuration every 5 minutes. This will help when I’m testing a new rules and configuration options. Some time I find myself locked out of my own remote server. How do I reset Linux firewall automatically without issuing hard reboot?


How do I add or remove hardware device driver (module) from running Linux kernel?