Linux Patching - RHEL

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EASY RED HAT 8.3 SERVER PATCHING STEP BY STEP | LINUX ADMINISTRATION PATCHING A BEGINNER'S GUIDE - YouTube

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Red Hat 8.3 : OPatching 

STEP 1 : PRE CHECK

• su root
• cat /etc/redhat-release or  cat /etc/os*
• uname -r
• rpm -q kernel --last
• subscription-manager status
• subscription-manager list
• yum repolist
• yum list available 
• yum updateinfo summary
• yum list kernel

STEP 2 : BASIC HEALTH CHECK

• ifconfig
• df -Hk
• netstat -nr
• cat /etc/fstab

STEP 3 : IMPLMENTATION

• yum update 
• uname -r
• init 6

STEP 4: VERIFICATION

• rpm -qa kernel
• uname -r
• yum updateinfo summary

Login into Red Hat system

Open terminal

Switch to root user 

• su root

Verify the redhat OS version

• cat /etc/redhat-release 

Verify the kernel version 

• uname -r

Check the kernel installation date and time 

• rpm -q kernel --last

Check the subscription status

• subscription-manager status

Check the subscription list

• subscription-manager list 

List the repo

• yum repolist

Check the available updates

• yum list available
• yum updateinfo summary 

Step 1 pre-check completed 

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STEP 2 : BASIC HEALTH CHECK

• ifconfig
• netstat -nr 
• df -hk
• cat /etc/fstab

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STEP 3 : IMPLEMENTATION

• yum update

• uname -r
• yum list kernel
• rpm -qa kernel
• init 6 -- command gracefully reboots the system running all the K* shutdown scripts first
• vmware 

After reboot -- verify the kernel version 

• rpm -qa kernel
• uname -r
• yum updateinfo summary 
• cat /etc/redhat-release
• uname -r
• yum update summary 
• yum updateinfo summary 

OS patch done. 

----------------Command to Patch the system-----------------------------------

For Red Hat Linux distributions (e.g. RedHat, CentOS, Oracle), the following commands check for updates and patches the system:

yum check-update

yum update

For Suse-based Linux (e.g. Suse Linux Enterprise, OpenSuse), the following commands check for updates and patch the system:

zypper check-update

zypper update

For Suse-based Linux (e.g. Suse Linux Enterprise, OpenSuse), the following commands check for updates and patch the system:

zypper check-update

zypper update

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