File I/O operations in Spark

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1. Error message

• The error shows
  https://vault.centos.org/6.6/os/i386/repodata/repomd.xml: [Errno 14] problem making ssl connection

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3. Summary

Tip: Here is a summary of the article:
For example: the above is what I will talk about today. This article only briefly introduces the use of pandas, and pandas provides a large number of functions and methods that allow us to process data quickly and easily.

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​ 【Easter eggs are coming】

After reading this blog post written by the author, please see:

1. https://vault.centos.org/6.6/os/i386/repodata/repomd.xml: [Errno 14] problem making ssl connection

2. CentOS update yum source and detailed explanation of yum command

3. centos6 yum source settings

4. Yum source configuration under Linux system (Centos 6)

5. Linux update yum method

created in 2022.11.19，updated in 2022.12.08