Make a note of what to learn and some resources

Some good c++ open source project recommendations

https://www.zhihu.com/question/21376384

Some good python projects to recommend

https://www.zhihu.com/question/29372574

other

1. Linux learning, shell commands, makefile writing, etc. (gdb debugging, memory leaks, etc. with lower priority)

2. Language c++ go python

3. Be sure to read the open source library libevent, (nginx has a lower priority)