#linuxday

Checking logs is an important activity to see what’s happening on your Linux servers, especially when you are trying to locate an issue. It easy when you are just managing 2, 3 servers but what to do when you are handling 50 or 100 servers?

That’s when Centralized log management comes into the picture. We can sync all the Linux server logs (auth logs, cron logs, syslogs, etc) to a single Linux server so that we have access to logs of all the servers, whether 1 or 100, on a single server & when we are required to check logs, we will just login to a single server & will have access to logs from all servers.

One of the most annoying things according to me while managing servers is trying to search for a file in Linux servers. At one point or another, we are required to find a file’s location in a Linux server where you need to make changes or have to locate a file with logs, backup, etc.

In this tutorial, we will learn how to search a file in Linux, using the following two commands,

1- Find command

2- Locate command

DHCP servers are used almost in all organizations or even in our home routers for assigning IP addresses to get access to the internet. Usually, when we enable our network interface on our CentOS 7 or 8 systems, an IP address is assigned automatically through that DHCP server & we have access to the internet or to our LAN network. But we might be required to assign static IP addresses in our CentOS 7 or 8 machines.

If you are trying to install a new Ubuntu version or just want to see how a new version of Ubuntu looks like, then the best way to do so is to create and use a Live USB aka Ubuntu bootable USB.

Not only can we install or test Ubuntu, but we can also use it as a personal operating system that can be used on any Laptop or Desktop without having to make any major changes to the systems.

You will need the following to create a Ubuntu Bootable USB from the command line or CLI,

   USB drive / Pendrive with at least 4 GB capacity    Ubuntu ISO file (get it from HERE Get Ubuntu | Download | Ubuntu)    a Linux system (here we are using Ubuntu only but this tutorial will work for all Linux systems)

In this tutorial, we will learn how to upgrade Ubuntu 18.04 or 20.04 to Ubuntu 21.04. Ubuntu 21.04 aka ‘Hirsute Hippo’ has released on 22nd April 2021. Ubuntu 21.01 has introduced a number of changes like,

Dark theme by default

Linux 5.11 kernel

Wayland as default session

Private home directory

New desktop icons extension

LibreOffice 7.1

Python 3.9 by default

In this tutorial, we will learn how to perform Ubuntu backups using Timeshift. Timeshift is a fabulous tool that is used for the backup & restoration of the Linux operating system, it takes incremental backup after the first initial complete backup. TImeshit creates filesystem snapshots using Rsync or BTRFS. It has a nice GUI as well as support for CLI.