> For the complete documentation index, see [llms.txt](https://docs-epc.gitbook.io/ncs-documents/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs-epc.gitbook.io/ncs-documents/compute/compute-instance/how-to-update-rocky-linux-9.md).
# How to Update Rocky Linux 9
**1. Take snapshot instance before update Rocky Linux 9**
How to : [https://docs-epc.gitbook.io/ncs-documents/compute/instance/managing-instance-s/taking-snapshot-s](/ncs-documents/compute/compute-instance/managing-instance/take-snapshot.md)
**2.Check OS and Kernel detail**
```
sudo cat /etc/os-release
```
```
sudo uname -r
```
**3.Run Command Check Available Updates**
```
sudo yum check-update
```
**4.Run Command Update**
```
sudo yum update -y
```
**5.After update finish, the status will show "Complete!"**
**6.Check OS and Kernal detail**
```
sudo cat /etc/os-release
```
```
sudo uname -r
```
**7.Check Service on the instance**
***Roll back steps***
In case the service not running properly, We can roll back as step below
1. Create Volume from Snapshot : [https://docs-epc.gitbook.io/ncs-documents/storage/block-storage/managing-volume-s/creating-from-a-volume-snapshot](/ncs-documents/storage/block-storage/managing-volume-s/create-from-a-snapshot.md)
2. Create Instance from Volume : [https://docs-epc.gitbook.io/ncs-documents/compute/instance/launching-instance-s/launching-from-a-bootable-volume](broken://pages/qrN1wpdFi5BjgbFT2767)
