Remove Unused Kernels Ubuntu 18.04
A question often asked… How do I remove old unused kernels from ubuntu 18.04?
Each time you receive a kernel update in your ubuntu 18.04 system updates, you end up with the old kernels remaining in your system. This can be useful in the event that the new kernel causes issues, you can always boot the old kernels. In time, old unused kernels can accumulate taking up unnecessary space on your drive.
Tags: tutorials, linux, command lineBash Arrays
Bash arrays are quite powerful and robust, but not often used in the command line. They are variables which contain multiple values often referred to as items or elements. Arrays do not have a maximum limit for items they can contain nor do the values need to be assigned or indexed contiguously.
Tags: tutorials, linux, command lineCheck If Directory Exists In Linux With Bash
It’s useful to know how to check if a directory exists in linux from a bash script. A directory is a folder within a path in your linux system where all sorts of files and directories are stored. Your Music folder is a directory to store music files and your Downloads folder is a directory where all sorts files are downloaded from the web. You get the idea.
Tags: tutorials, linux, command lineColors In Bash Scripts
Using colors in bash scripts can be very useful. If you’ve written your bash script with menus and prompts, it’s a good idea to use ansi color codes to make your outputs more readable to the user. In this tutorial I’ll cover some ways that you can use colors in your bash scripts for a more GUI like experience.
Tags: tutorials, linux, command lineCreate a Menu in a Bash Script
Creating a menu in a bash script can be quite useful and at times necessary. A bash menu can allow you to provide options for user input. Upon user selection of an option in your menu, you can run a command or sequence of commands and display outputs.
Tags: tutorials, linux, command lineWrite Bash Functions
Writing bash functions is a great way to make your scripts modular. If you find you’ll be needing to repeat sets of commands or code logic, it’s a good idea to use functions to avoid redundancy in your script. Bash functions also help keep your code neat and easier to maintain.
Tags: tutorials, linux, command line