Author: Ramdev

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Starting tool to introduce yourself to Devops culture – Git

DevOps is a new term emerging from the collision of two major related trends. It is  the outcome of  collaboration between development and operations staff throughout all stages of the development lifecycle when creating and operating a service, and how important operations has become in our increasingly...

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Upcoming Veritas Training Announcement

Veritas Storage Foundation and VCS administration for Unix and Linux Engineers, What is this course ? In Machine Critical Enterprise Server Environment, storage management and high availability are the two major requirements. These requirements are very dynamic in nature and require very efficient man power to...

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RHEL5/6 Interview Questions : DNS

1. There are four types of DNS servers. Name them. 1a. The four types of DNS servers are master, slave, caching-only, and forwarding. 2. What is the difference between an A record and a PTR record? 2a. An A record translates translated hostnames to IP addresses,...

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RHEL5/6 Interview Questions : NFS

1. Red Hat Enterprise Linux 6 uses the portmap service alongside the NFS service. True or False? 1a. False. The portmap service was replaced by the rpcbind service in Red Hat Enterprise Linux 6. 2. What is the /var/lib/nfs/etab file used for? 2a. The /var/lib/nfs/etab file is...

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RHEL5/6 Interview Questions : SELinux

1. What is the point of using SELinux? 1a. SELinux provides enhanced granular security for the Linux operating system. 2. What are SELinux Booleans? 2a. SELinux Booleans provide restrictions to different aspects of a service. 3. What command can you use to change the context of...

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RHEL5/6 Interview Questions : Networking

1. What command displays your current interfaces and IP address? 1a. ifconfig 2. What does ifconfig 172.168.1.100 netmask 255.255.255.0 eth1 do? 2a. This command sets the eth1 interface to have a static IP address of 172.168.1.100 with a netmask of 255.255.255.0. 3. What command can you...

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Securing DHCP server with Firewall ( RHEL5/6)

Before any of the clients can start obtaining an IP address from the DHCP server, you need to deal with the security requirements for the DHCP server. They include adding a firewall rule with iptables and disabling any SELinux options that prevent the DHCP service from...

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