How to update linux system

Simple operation and operating principle of Linux system update. Recommended online video tutorial: linux video tutorial

1. Upgrade principle:

1. System upgrade is actually a process of deleting and reinstalling software packages. During the process, apt-get will automatically delete the old software package, so that the index file of the software package must be updated when the system is upgraded. .

2. During the system upgrade process, the original system kernel software will be retained in the system, so that when an exception occurs when using the new system kernel to boot the system during the system upgrade process, we can use the old system kernel software. The kernel continues to boot the system.

2. Upgrade operation:

1. Update the software package index file

sudo apt-get install update

2. Update the system

sudo apt-get update

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