WAR for en preliminary

[yifeifang]

en/preliminary/LinuxSystemInstallationAndBasicUsage.md

https://github.com/yifeifang/ysyx-docs-content/blob/26650d603c3a1c0eb5f2d64b4f530acf79991093/en/preliminary/LinuxSystemInstallationAndBasicUsage.md#L12 need to be fixed due to PA not available yet

[yifeifang]

https://github.com/yifeifang/ysyx-docs-content/blob/22a6a0077962fa5b9c61a545e6c7b708336321e1/en/preliminary/CompletePA1.md#L40-L44

WAR due to PA not available

[yifeifang]

https://github.com/yifeifang/ysyx-docs-content/blob/db5e124e7c1ea7795663a5ec756972750513bdf0/en/preliminary/CompletePA1.md#L25

https://github.com/yifeifang/ysyx-docs-content/blob/22a6a0077962fa5b9c61a545e6c7b708336321e1/en/preliminary/LinuxSystemInstallationAndBasicUsage.md#L10

WAR due to PA