How to quickly create a 150 GB file on Ubuntu

There are various methods to create a 150 GB file on Linux, but the fastest way to do so is to use fallocate. Open a terminal window and enter the command below:

$ fallocate 150G filename <enter>

The above command creates a 150 gb file named filename.

. . . → Read More: How to quickly create a 150 GB file on Ubuntu

How to enable Cut, Copy and Paste menu options in Thunar after installing xubuntu desktop on Ubuntu 18.10

Upon installing the XFCE desktop, everything works fine. However, Cut, Copy and Paste menu options are greyed out in Thunar.

To enable this, select Settings -> Session and Startup -> Advanced and uncheck the box where it says Launch GNOME services on startup.

Reboot the computer and you will be able to cut, copy . . . → Read More: How to enable Cut, Copy and Paste menu options in Thunar after installing xubuntu desktop on Ubuntu 18.10

Wireless Adapter not detected in Linux Mint 19.1 on Dell Inspiron 5580

On a Dell Inspiron 5580, the wireless adapter is of Intel. The same is not detected when installing Linux Mint 19.1 the first time. This is because of the kernel not being updated.

Once Linux Mint 19.1 is installed, the later kernel 4.15.0-52 installed upon update, makes the wireless adapter work.

. . . → Read More: Wireless Adapter not detected in Linux Mint 19.1 on Dell Inspiron 5580

System scaling in Linux on 1920×1080 display (HiDPI)

Note system scaling works out of box with Cinnamon desktop. Open a terminal window and install it with:

$ sudo apt-get install cinnamon-desktop-environment <enter>

To do system scaling in the Gnome Desktop Environment, install the gnome-tweak tool. To do so, open a terminal window and enter the command as below:

. . . → Read More: System scaling in Linux on 1920×1080 display (HiDPI)

How to find out time taken in Linux by processes when starting the computer

To identify which system processes take how much time when booting your Linux system, open a terminal window, at type the following command:

$ sudo systemd-analyze blame <enter>

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