Linux has different methods to update all packages. Before updating the packages we may need to take backup. The exact command depends upon your Linux distribution:
1. Debian/Ubuntu – apt-get command
2. CentOS/RedHat/Fedora – yum command
Debian/Ubuntu – apt-get command
Run the following command to update the packages.
$ sudo apt-get update
$ sudo apt-get upgrade
CentOS/RedHat/Fedora – yum command
Note: for Kernel Update, some places we may need to disable exclude kernel from /etc/yum.conf
Run yum command to update all the packages in CentOS/RedHat/Fedora.
# yum -y update