Database & Cloud

It is a really easy task while I cannot find a complete command list to finish it, so I list the commands here to help others having similar request. yum install -y yum-utils device-mapper-persistent-...

Several weeks ago, One of our guys pressed the 'Upgrade' button of Jenkins, and after that it could not work any more. Of course he should not do this as he totally did not know the result, while I al...

I have used CentOS for years and now I have to consider to master Ubuntu. Most commands could be found on both OS and they do share lots of concepts, while there are some differences and even I cannot...

I tried to clone several repositories in two different GitHub accounts and I found even such simple task took me several hours and the main issue was that the ssh-agent always provided the cached keys...

When we change the parameters in the RAC systems, I always recommend to specify the SID clause clearly, which means you know which or all instances will be modified. If you ignore it, the result will ...

These days I created a K8s 1.21.0 cluster on Ubuntu 18.04 to prepare the CKA exam, and found there are some tips which could be shared here. To make it simple, the cluster is based on CRI-O container ...

My nephew installed Battlefield 1 on his laptop while he always got 'oxc000007b' error when he launched it. Usually I would like not to deal with personal Windows machines as a variety of software cou...

Last night my friend called me to check the network service issue after she added two SCAN IPs to one RAC system. She added these two IPs to resolve load balance issue as the customer found the connec...

In last month, one engineer of our customers made a mistake and changed the file permissions of the whole RAC database wrongly, including GI and DB home. Of course the clusterware could not be started...

Could not believe it took me more than 3 hours to just install a printer! Just now helped one relative to install HP printer on Sureface and always failed. At the beginning the driver could not be ins...