> command-line Unix tools are no longer valid today Strongly disagree. The understanding of the OS, the data, and how to checkmate the problem with minimal eff

> command-line Unix tools are no longer valid today Strongly disagree. The understanding of the OS, the data, and how to checkmate the problem with minimal effort is timeless. Programming languages are relatively ephemeral compared to POSIX utilities. Invest in knowledge of the enduring.