List All Built-In Bash Commands In Ubuntu / Linux Mint

Using the help feature to know more about a specific Bash command
With so many commands available at disposal from the Ubuntu / Linux Mint terminal, it can be useful to get a list of built-in commands supported by the Bash shell. (To get and idea about what a Linux shell is, refer to this brief overview of different shells in Linux  and to know how to use  various commands, refer to the Linux command line tutorial series). For getting the list of Bash commands,...

How To Display Gnome Classic Menu In Ubuntu Using ClassicMenu App

Gnome classic menu as displayed by classicmenu indicator app
ClassicMenu Indicator is a tiny Ubuntu app that displays the good old Gnome classic menu. This is useful when using the Unity interface in Ubuntu and if needed to simplify access to various categories of programs that are currently present in the system. Install it by typing the following at Terminal : sudo apt-get install classicmenu-indicator Once installed, it needs to be launched only once (it...

How To Change Lock Screen Background In Ubuntu

Here is how to change the lock screen display picture in Ubuntu : Right click on desktop and choose ” Change Desktop Background”. There will be two panes visible : Background and Lock Screen. Click on “Lock Screen”. Scroll through the backgrounds and choose the one needed, finally hit “Select”. All done. The new background will now be active for the lock screen.  

How To Restore Ubuntu After Reinstalling Windows

advanced options for boot-repair tool in Ubuntu
In a dual boot system with Windows and Ubuntu , it may happen that once Windows is reinstalled, the Ubuntu loader (Grub) which gives a choice to select between Ubuntu and Windows at startup will no longer be available and the system will directly boot to Windows. This is because Windows boot loader will replace Grub and so existing Ubuntu install will no longer be accessible. To restore Ubuntu, grub...

How To Quickly Remove Obsolete PPAs In Ubuntu/Linux Mint

List available third party PPAs
When installing third party applications in Ubuntu / Linux Mint, one needs to specifically first add the PPAs (Personal Packaging Archives) and then install the related required applications. Now over a course of time, it may happen that these added PPAs may become obsolete or are simply no longer existent. This will cause errors when updating Linux Mint/Ubuntu systems as the updates won’t be...

How To View CPU And Memory Usage Graphically In Ubuntu / Linux Mint

CPU, memory and network usage info in System Monitor
Just like Microsoft Windows has it’s default task manager that can display list of runninng services, utilization of CPU and memory as well as other system resources, Ubuntu / Linux Mint too comes with it’s own task manager. It is termed “System Monitor” and can be easily used to view how much RAM, CPU and what kind of processes are running in an easy to view graphical format. To...