The difference between yum-y upgrade and yum-y update

Original production environment:

Os:centos release6.7 (Final)

[[Email protected]]# uname-a

Linux sky9896 2.6.32-573.12.1.el6.x86_64#1 SMP Tue Dec 21:19:08 UTC x86_64 x86_64 x86_64 gnu/linux

Will the version and kernel change after the upgrade?

1. #yum –y Upgrade

// upgrade all packages, do not change the software settings and system settings, System version upgrade, the kernel does not change.

[Email protected]]# yum–y Upgrade

After executing upgrade ,the OS version environment and package changed, but the kernel did not change.

[[Email protected] ~] #cat/etc/redhat-release

CentOS Release 6.8 (Final) #版本由6.7 Upgrade to 6.8

[[Email protected] ~] #uname-A

Linux sky9896 2.6.32-573.12.1.el6.x86_64#1 SMP Tue Dec 21:19:08 UTC x86_64 x86_64 x86_64 gnu/linux #内核没有变化

2. Upgrade All packages, change software settings and system settings, and upgrade the system version kernel.

[Email protected]]# yum-y-update

// in a production environment, if Update upgrade, unable to estimate the consequences of the upgrade, do not do here Update upgrade the experiment.

Here also ask you a question: On the production server, whether the above two ways to upgrade the system, so that the appropriate operation?

This article is from the "Linux~dba~mba~eie" blog, make sure to keep this source http://sky9896.blog.51cto.com/2330653/1784526

The difference between yum-y upgrade and yum-y update