partitions vs filesystems https://unix.stackexchange.com/a/320423/162041
understanding strace output https://stackoverflow.com/questions/6334515/how-to-interpret-strace-output
[reverse] port forwarding https://unix.stackexchange.com/a/115906/162041
cross-entropy https://stats.stackexchange.com/a/235541/127730 https://eli.thegreenplace.net/2016/the-softmax-function-and-its-derivative/ https://youtu.be/ErfnhcEV1O8
ssh/sshd security https://unix.stackexchange.com/questions/82626/why-is-root-login-via-ssh-so-bad-that-everyone-advises-to-disable-it
commonly used ports https://security.stackexchange.com/questions/5799/are-some-uncommon-tcp-ports-scanned-less-than-others
personal growth https://softwareengineering.stackexchange.com/questions/44177/what-is-the-single-most-effective-thing-you-did-to-improve-your-programming-skil