SSH (Secure SHELL) is an open-source and most trusted network protocol that is used to log in to remote servers for the execution of commands and programs. In this article, we will see that how to set up password-less ssh on Linux using ssh keys to connect to remote Linux servers without entering a password. I have the following […]  Read More »

Convert Video File from MKV to MP4 Split Video  Read More »

Find who is logged on and What they are doing Kill tty Connections Find Common Elements Between Two Lists comm is great, but indeed it needs to work with sorted lists. Alternative with sort: reflector  Read More »

There is a command named column which already helps you to print csv in tabular form. Here, we have used the same column command in csv2table script which automatically take care of the header and prints in tabular form with border. Example Note: Please make sure you are using latest column version. You can build […]  Read More »

wrk is a HTTP Benchmarking tool. It can generate significant amount of load on a HTTP server. Here is an example how it works. This runs a benchmark for 30 seconds, using 12 threads, and keeping 400 HTTP connections open. Output: wrk requires LuaJIT and OpenSSL as dependencies. You may face the following issues while […]  Read More »

Set Global Git Username and Email Set Git Username and Email for a Single Repository Add and Commit files to a Git Repository Push the Changes to the Remote Repository  Read More »

qperf measures bandwidth and latency between two nodes. It can work over TCP/IP as well as the RDMA transports. How to install qperf? On CentOS/RHEL8, qperf is available from the EPEL repository. Install it like this: The Ubuntu/Debian repositories do not have qperf, so you’ll need to build it from source. Open the firewall on the Server On […]  Read More »

You might have bsd version column on your system, which might be an older version. You can build column using the following steps. Build column  Read More »

Let’s try to write a sample assembly language code and then compile and run it on Linux x86 platform. This code will just print Hello World. There are several way to write the assembly code. You can find more details here. I have picked one of them. Programming Using System Calls 64-bit Linux installations use […]  Read More »

By default any application network port mostly will be blocked by the Operating System’s firewall. As a result you will face that applications from two system are not able to communicate to each other. The same works perfectly if you run them on the same system. You can open or add the network port in […]  Read More »