What is low and high memory in Linux ?
Low memory is the memory to which our Linux kernel has direct physical access. High memory is the memory to which our Linux kernel does not have direct physical access...
Month: November 2018
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Difference between procfs and sysfs filesystem in Linux
/proc and /sys partitions keeps the system information on which its running and are useful to get any system details or running configuration we need. As we know in Linux,...
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How to check open ports in Linux: On local & remote hosts; nc, telnet, nmap, netstat commands.
In this article, we will look how to check for open ports on a remote Linux server. The most commonly used commands for this purpose is telnet, nc, and nmap...
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Using for loop in python to test ping response from multiple hosts
Today let us have a look at an interesting python script to test ping connectivity on a list of hosts. To understand this lets create below script and a hosts...
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How to change bash prompt color and look in Linux: PS1, PS2, PS3, PS4 Environment Variables.
Prompt Statement or PS defines various variables to change the look or behavior of the Shell prompt. There are four prompt statements available alongwiith a prompt command variable in Linux...
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Explanation of Network Bonding and its types in Linux.
The process of combing two or more network interfaces together to form a single interface is known as network bonding. In Linux, we usually combine two ethernet interfaces to create...
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How to test a port connectivity in Linux on multiple hosts ?
In this short article, we will look how to test a port on Linux on multiple hosts. This tip is very useful to test the port connectivity on a large...
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Difference between Grub 0.97(Legacy GRUB) and Grub 2 in Linux ?
We all know with RHEL7 or Centos 7.0, the GRUB 2 is introduced. Lets have a look at the differences between GRUB 1(0.97) and GRUB 2 in Linux. 1. Introduction...