Ubuntu

How to Disable apt Ubuntu Pro Advertisement

July 2, 2024March 10, 2024 by Yujin Boby

On running “apt upgrade” command on Ubuntu 20.04 and newer, Ubuntu shows an advertisement about Ubuntu Pro subscription. To disable the Ubuntu…

How to Install MySQL 5.7 on Ubuntu 22.04

October 27, 2024February 11, 2023 by Yujin Boby

MySQL 5.7 is not supported on Ubuntu 22.04, but you can download MySQL 5.7 for Ubuntu 18.04 and install it on Ubuntu…

rsyslog Unsafe symlinks encountered in /var/log, refusing

September 24, 2022 by Yujin Boby

When updating packages on an Ubuntu server, I got the error “Unsafe symlinks encountered in /var/log, refusing.”. root@ip-172-31-45-33:/var# apt upgrade -y Reading…

Install CSF firewall on Ubuntu Server

January 3, 2026March 26, 2022 by Yujin Boby

First, install libwww-perl package needed for CSF firewall Install CSF with Change following settings in csf.conf file If you need GUI enabled,…

How to Migrate Linux Server with rsync

July 5, 2026February 19, 2022 by Yujin Boby

A few days ago I wanted to Migrate an Ubuntu VPS from one provider to another. I tried to take a snapshot…

How to verify installed packages on Ubuntu/Debian

January 27, 2022January 19, 2022 by Yujin Boby

To verify the integrity of installed packages, you can use debsums utility. First of all install debsums with command apt install -y…

Convert image to WebP format in Ubuntu

December 13, 2021 by Yujin Boby

WebP is an image format for web by Google. The size of webp images are much smaller compared with other image formats,…

How to disable GUI in Ubuntu

June 26, 2022December 9, 2021 by Yujin Boby

If you have installed Ubuntu with GUI and don’t want GUI, you can disable GUI from starting on boot with command systemctl…

bash: locale-gen: command not found

June 14, 2021 by Yujin Boby

When I run locale-gen command, i get the following error root@netmon1:~# locale-gen en_US.UTF-8 bash: locale-gen: command not found root@netmon1:~# To see which…