Category: Linux

Using grep command in Linux

What is grep ? Grep stands for Global Regular Expression Print. Grep utility is usually used to find lines in a file/files containing particular strings and substrings. Grep comes preinstalled on any modern Linux distribution, so we can start using it without having to install anything. Before we start looking at usage examples of grep

Using awk command in Linux

What is awk? Awk is a programming language which has loops, arrays, functions etc., but nowadays mostly used only for “one-liners”. Awk is not used for creating complex programs, but it  is great when we need to add some additional functionality to our standard Linux commands. We will have a look at some of its

ifconfig missing in Ubuntu 18.04

Command ‘ifconfig’ not found in Ubuntu 18.04 ifconfig utility has been deprecated and completely removed in Ubuntu 18.04 If you try to run ifconfig you will get error: administrator@ubuntu:~$ ifconfig Command 'ifconfig' not found, but can be installed with: sudo apt install net-tools You may install ifconfig utility by running sudo apt install net-tools or you