Well, the article's author assumes every GNU/Linux sysadmin is running bash as the default interactive shell for root, and systemd as the init/login/logger/netw

Well, the article's author assumes every GNU/Linux sysadmin is running bash as the default interactive shell for root, and systemd as the init/login/logger/network/<and satan knows what else> daemon, which is not true. Many distributions using the linux kernel avoid systemd and bash as part of the defaults, for lots of different reasons, so from a technical point of view I think the article is useless.