busybox

$ head --version
head 0.0.6
$ head /proc/asound/cards
 0 [tlv320aic31xxhi]: tlv320aic31xx-h - tlv320aic31xx-hifi
                      tlv320aic31xx-hifi
$ tail --version
tail 0.0.6
$ RUST_BACKTRACE=full tail /proc/asound/cards
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 22, kind: InvalidInput, message: "Invalid argument" }', src/uu/tail/src/tail

86757f376561db47a5d242b9dc70b5a88147af86 turns TestDeadProcess off, as it failed in circleci for no clear reason. Needs to get turned back on.

Current test code coverage is pretty low (about 13.56%): https://codecov.io/gh/mesalock-linux/mesabox/tree/master

Our target coverage is around 80%.