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Dual booting: Graphical tool to edit the Grub menu in Lubuntu

December 12th, 2015 No comments

I have found a tool that allows to customize and then save Grub menu changes such as:

1) Which operating system loads by default

2) The amount of time the startup prompt option takes before starting automatically

This is usually the first customization task I need to do whenever I dual boot Linux and Windows.

The graphical tool’s name is grub-customizer and it is available from an Ubuntu ppa repository.  The developer’s profile is here

sudo add-apt-repository ppa:danielrichter2007/grub-customizer

sudo apt-get update

sudo apt-get install grub-customizer

Basic linux firewall commands

August 3rd, 2015 No comments
sudo ufw status

confirm if firewall is running.  This command displays whether the ufw firewall is running and it also lists the active rules

sudo ufw enable

enable the firewall and also force it to load from system start

sudo ufw disable

disable the firewall and disable it from loading from system start


Stop the postix server from the command line

August 2nd, 2015 No comments

After an ubuntu upgrade, I detected lots of activity going on postfix.

I did not want to disrupt other ongoing web activity so I decided to temporarily shut down the postfix server with the following command:

sudo postfix stop