1. Pandas显示设置（最大行数等）

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   pd.set_option('max_rows', 500) #param choices # display.height # width # max_rows # max_columns

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mkdir build cd build cmake .. make

1. Install Bazel (a )

   1. Install JDK 8
      

Clean up old kernel

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uname -r #check current using kernel dpkg --get-selections |grep linux # list installed kernels apt purge xxx # remove