Types of Virtualization available in Linux/Unix

In our previous post we seen what is Virtualization and how is it useful in utilizing resources to the extent. In this post we will see what are the different types of virtualization available in Linux. Virtualization is divided broadly in two types 1)Level of virtualization(like full or partial or para virtualization) 2)Types of Virtualization(like(…)

What is Virtualization in Linux way?

Virtualization is a concept to simulate software and hardware virtually so that we can use system resources effectively. The main reason people are moving to virtualization is effective utilization of resources. Lets try to understand this concept by going in to history and then in Linux way to understand it better. When computers started growing(…)

Find RAM slots info in Linux

Finding RAM size details in Linux for a System admin is very easy task. We can use free command to check how much RAM is present in our system. But when you want to find how many RAM/Memory slots are present in your system is bit tricky one. One way to do open your system(…)

Linux Directory Structure explained: /dev folder

This is our fourth post on Linux Directory structure series. Some of the posts already covered are Linux Directory Structure explained: /boot folder Linux Directory Structure explained: /bin folder What is lost+found directory in Linux/Unix? Today we will see what is /dev folder and its uses. Linux/Unix treat everything as files. One classic example is(…)

What is lost+found directory in Linux/Unix?

Q. One of our blog reader asked.. why lost+found directory is created after a fresh installation and what information it contains ? Please let me know about this directory? This is an important directory which is useful for recovering files which are not properly closed due to many reason such as power failure. Lost+Found is created by(…)

Linux Directory Structure explained: /bin folder

This is second post in our Linux directory explanation series. /bin is one more important folder. Bin stands for binary which means an executable file. This folder contains commands or scripts or executable which can be executed to accomplish a task. We have some cousins to this folder as given below along with bin folder. /bin /sbin /usr/bin /usr/sbin(…)

Does rm, cp, mv etc work alphabetically?

Q. Is rm -rf * removes the files in alphabetically? Simple answer is yes, the files/folders are removed in alphabetic sequence. I ran strace command to support my answer. I have 4 files in my dir as shown below [email protected]:~/scripts/temp/temp$ ls -lrt total 0 -rw-rw-r– 1 surendra surendra 0 Oct 10 23:55 c.txt -rw-rw-r– 1(…)

how to read or view utmp, wtmp and btmp files in Linux/Unix

View utmp, wtmp and btmp files In Linux/Unix operating systems everything is logged some where. Most of the system logs are logged in to /var/log folder. This folder contains logs related to different services and applications. In this folder we have some files such as utmp, wtmp and btmp. These files contains all the details(…)

How to generate GPG key in Linux?

Generating GPG key in Linux Q. Recently when we are building a RPM package using rpm-build we come across a requirement to have GPG key inserted in to the package for security and authenticity of the rpm package, so that people will come to know it came from us. This prompted us to create our(…)

Linux Directory Structure explained: /boot folder

Linux /boot folder This is the first post on our series of Linux Directory structure posts. From today onwords we will deep dive you in some of the important directories in Linux. Knowing about these directories a Linux user will know what each directory meant for. Lets start with alphabetical order. Our first Directory is(…)