Debian Linux 9.4 released and here is how to upgrade it

The Debian GNU/Linux project has released an updated version of its stable Linux distribution Debian 9 (“stretch”). You must upgrade to get corrections for security problem as this version made a few adjustments for the severe issue found in Debian version 9.3. Debian is a Unix-like (Linux distro) operating system and a distribution of Free Software. It is mainly maintained and updated through the work of many users who volunteer their time and effort. The Debian Project was first announced in 1993 by Ian Murdock.

More about Debian Linux 9.4 released

From the release note:

Please note that the point release does not constitute a new version of Debian 9 but only updates some of the packages included. There is no need to throw away old stretch media. After installation, packages can be upgraded to the current versions using an up-to-date Debian mirror.

Those who frequently install updates from security.debian.org won’t have to update many packages, and most such updates are included in the point release.

New installation images will be available soon at the regular locations.

Upgrading an existing installation to this revision can be achieved by pointing the package management system at one of Debian’s many HTTP mirrors.

How to upgrade Debian 9 from version 9.3 to 9.4

The procedure is as follows. First, note down the current version:
$ lsb_release -a
$ uname -mrs

Sample outputs:

No LSB modules are available.
Distributor ID:	Debian
Description:	Debian GNU/Linux 9.3 (stretch)
Release:	9.3
Codename:	stretch

Upgrade the system

Type the following apt-get command/apt command to upgrade your system:
$ sudo apt-get update
$ sudo apt-get dist-upgrade

Debian Linux 9.4 released

Finally reboot the Linux system:
$ sudo reboot

Verification

Verify that upgrade went smoothly:
$ uname -mrs
$ lsb_release -a
$ dmesg | egrep -i 'err|warn|critical'
$ sudo tail -f /var/log/myapp

Debian version 9.4 running on my laptop
The installer has been updated to include the fixes incorporated into stable by the point release. You can download updated ISO for full installation too. This stable update added important package corrections and security enhancements to the system. Happy upgrades!

 

Source