You could work your way through some of the "Linux Programming Interface" by Kerrisk.
Even if you only use high level languages, the LPI provides insight on what's happening under the hood. It also gives important context for when you do performance analysis and program optimization. Each chapter has a bunch of exercises at the end.
Even if you only use high level languages, the LPI provides insight on what's happening under the hood. It also gives important context for when you do performance analysis and program optimization. Each chapter has a bunch of exercises at the end.