CentOS 7 Installation Steps with Screenshots
After the release of Red Hat Enterprise Linux 7 (RHEL 7) , CentOS community has released its latest Operating System named as CentOS 7. Some […]
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20 Postfix Interview Questions and Answers
Q:1 What is postfix and default port used for postfix ? Ans: Postfix is a open source MTA (Mail Transfer agent) which is used to
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Disable reboot using Ctrl-Alt-Del Keys in RHEL / CentOS
In Linux, It’s a security concern for organization to allow anyone to reboot the server using Ctrl-Alt-Del keys. It is always recommended in production boxes
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Postfix – Enable logging of email’s subject in maillog
By default postfix only capture ‘From’ and ‘To’ details in the log file (/var/log/maillog). There are some scenarios where we want that email’s subject should
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How to Check Hard Drive for Bad Sectors or Blocks in Linux
Badblocks is the command-line utility in Linux like operating systems which can scan or test the hard disk and external drive for bad sectors. Bad
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Linux/UNIX Awk Command Tutorial with Examples
In this tutorial, we will explain Linux/UNIX AWK Command with examples. AWK is a versatile and lightweight text-processing language that comes pre-installed on most Unix-like
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How to Use Variables in Shell Scripting
In this post, we will discuss how to use variables in bash shell scripting with examples. In every programming language variables plays an important role
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Xen hypervisor: Assign Virtual Disk to a Virtual Machine
Dealing with our daily admin tasks we face lot of requests where we need to assign virtual disks or additional disks to Virtual Machines running
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BIND – DNS Server Interview Questions and Answers
Q:1 What does BIND Stands for ? Ans: BIND stands for Berkeley Internet Name Domain. Q:2 What is DNS Server and its fundamentals ? Ans:
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How to Install PuTTY (SSH Client) on Ubuntu Linux
In this post, we will explain you how to install Putty (SSH Client) on Ubuntu Linux. In the world of Linux, secure remote connections are
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