Customize User Environment

GEEKS !! Remember using useradd command during your RHCE Training. Now its time to change some defaults that you use while creating user accounts. Like whenever you create user account in Linux using… Continue reading →

dumpe2fs linux

Here is the output of dumpe2fs linux command from my machine. You guys must have worked with it while doing RHCE Training or doing any other Red Hat Training. Now its the time… Continue reading →

ARP Cache in Linux

GEEKS !! You know whenever you contact another machine either by using IP address or FQDN, its hardware address (MAC address) get mapped inside your machine using ARP (Address Resolution Protocol). You can… Continue reading →

checking bad sector

GEEKS !! You all have used mkfs.ext4 or mke2fs command while creating file system during your RHCE Training or RHCSS Training. But did you know that.. While using mke2fs or mkfs.ext4 to create… Continue reading →

Apache Permissions

Ready reference of Apache Permissions.

Virtual Network Switch

GEEKS !! You all must have done and created VM’s during your RHCE Training using KVM or XEN (if you had done your training on RHEL 5). Ever noticed that whenever you start… Continue reading →

Packets Dropped Linux Server

GEEKS !! Remember ifconfig command that your have used a lot during your RHCE Training or any Red Hat Linux Training. Sometime you might experience that your Linux server is not responding in… Continue reading →

Packet Sniffer, tcptrack

GEEKS !! Here comes another good packet sniffer. After you have learned about packet sniffers like netstat etc in your Red Hat Linux Training. TCPTRACK. Tcptrack is a sniffer which displays information about… Continue reading →

ss linux utility

GEEKS !! Here is a real good utility to investigate sockets and connections on your Linux Server. You must have used netstat like commands during your RHCE Training or RHCSS Training. Please welcome… Continue reading →