Category Archives: Knowledgebase

The Knowlege base arranges tips and userful informations scattered on the web.

Next.js: Give it a Try!

Posted on July 11, 2022 by Giovanni Giorgi
I was trying to explore a way to build a client/server application in Typescript; after some failed experiments, I found something better: Next.js offer the ability to build a React application and to render server-side its dynamic components. So you can … Continue reading →
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Bash Regular expression replace (regexp)

Posted on April 13, 2022 by Giovanni Giorgi
You can easily use bash to search-and-replace on variables… f="/home/alice/myfile.md" $ echo ${f//.md/.pdf} /home/alice/myfile.pdf $ echo ${f//alicee/bob} /home/alice/myfile.md $ echo ${f////-} -home-alice-myfile.md  
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Data Driven Form in angular

Posted on February 5, 2022 by Giovanni Giorgi
  JSON Schema is a vocabulary that allows you to annotate and validate JSON documents. Benefits Describes your existing data format(s). Provides clear human- and machine- readable documentation. Validates data which is useful for: Automated testing. Ensuring quality of client submitted data. On top of … Continue reading →
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OCI Autonomous Database: Change MEDIUM Service Concurrency Limit

Posted on January 27, 2022 by Giovanni Giorgi
On Oracle Autonomous Database (Oracle Cloud DB service), the consumer groups of the predefined service names provide different levels of performance and concurrency. How do you tune this limits? From the Autonomous Database details page, click Service Console. On the Service Console click Administration. … Continue reading →
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Log4jShell

Posted on December 20, 2021 by Giovanni Giorgi
Log4jShell vulnerability Kasperky article https://www.lunasec.io/docs/blog/log4j-zero-day-update-on-cve-2021-45046/ with the following “news”:If you have previously used LOG4J_FORMAT_MSG_NO_LOOKUPS to mitigate the log4shell vulnerability, in certain conditions this will not be sufficient to protect your code from RCE. Refer to our mitigation guide for additional steps … Continue reading →
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HyperV Machine Export

Posted on October 28, 2021 by Giovanni Giorgi
Shutdown VM and compress the compact the disks Check if you have enough space: you need more or less the space of the VM disks+ minimal RAM configured From your Hyper-V host, run PowerShell as an administrator and then run … Continue reading →
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Cassandra Compendium

Posted on August 29, 2021 by Giovanni Giorgi
Apache Cassandra Compendium, pasting together documentation from https://cassandra.apache.org/doc/latest/cassandra/data_modeling/index.html
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