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How to run Linux Commands within vi/vim editor

  • Pradeep Kumar Pradeep Kumar
  • January 23, 2020

There are some scenarios where UNIX or Linux admin wants to run linux commands and insert the output of commands in vi editor without leaving… Read More »How to run Linux Commands within vi/vim editor

Linux-Xargs-Command-Examples

11 Xargs Command Examples in Linux

  • Pradeep Kumar Pradeep Kumar
  • March 8, 2020

xargs is a command in UNIX like System that reads items from the standard input, delimited by blanks (which can be protected with double or… Read More »11 Xargs Command Examples in Linux

20 Linux Virtualization Interview Questions and Answers

  • Pradeep Kumar Pradeep Kumar
  • August 4, 2017

Q:1 What is Virtualization ? Ans: Virtualization is a technique for creating virtual resources (rather than the actual) such as server, storage device, network  and… Read More »20 Linux Virtualization Interview Questions and Answers

Screen-after-login

OpenSUSE 13.1 Installation guide with Screenshots

  • Pradeep Kumar Pradeep Kumar
  • August 4, 2017

OpenSUSE is the most widely used linux distribution. It is free / opensource which is suitable for laptops, desktops, netbooks, servers and multimedia center PCs… Read More »OpenSUSE 13.1 Installation guide with Screenshots

Start-Mplayer-Ubuntu-Linux

How to Install MPlayer (Media Player) in Ubuntu Linux

  • Pradeep Kumar Pradeep Kumar
  • December 17, 2021

MPlayer(Media Player) is a multimedia software in Linux like operating systems, it is used to play audio and video files from its GUI (SMPlayer) and… Read More »How to Install MPlayer (Media Player) in Ubuntu Linux

Centos-7-screen-after-login

CentOS 7 Installation Steps with Screenshots

  • Pradeep Kumar Pradeep Kumar
  • January 25, 2020

After the release of Red Hat Enterprise Linux 7 (RHEL 7) , CentOS community has released its latest Operating System named as CentOS 7. Some… Read More »CentOS 7 Installation Steps with Screenshots

20 Postfix Interview Questions and Answers

  • Pradeep Kumar Pradeep Kumar
  • August 4, 2017

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… Read More »20 Postfix Interview Questions and Answers

Disable reboot using Ctrl-Alt-Del Keys in RHEL / CentOS

  • Pradeep Kumar Pradeep Kumar
  • December 22, 2020

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… Read More »Disable reboot using Ctrl-Alt-Del Keys in RHEL / CentOS

Postfix – Enable logging of email’s subject in maillog

  • Pradeep Kumar Pradeep Kumar
  • August 4, 2017

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… Read More »Postfix – Enable logging of email’s subject in maillog

bad-sectors

How to Check Hard Drive for Bad Sectors or Blocks in Linux

  • Pradeep Kumar Pradeep Kumar
  • December 31, 2020

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… Read More »How to Check Hard Drive for Bad Sectors or Blocks in Linux

awk-command-examples-linux

Linux/UNIX Awk Command Tutorial with Examples

  • Pradeep Kumar Pradeep Kumar
  • July 30, 2021

Awk is a scripting language which is used  for  processing or analyzing text files. Or we can say that awk command is mainly used for… Read More »Linux/UNIX Awk Command Tutorial with Examples

How to Use Variables in Shell Scripting

  • Pradeep Kumar Pradeep Kumar
  • October 18, 2020

In every programming language variables plays an important role , in Linux shell scripting we are using two types of variables : System Defined Variables… Read More »How to Use Variables in Shell Scripting

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