> ls, grep, find, ps, htop will always be what they are.
SystemD screwed with a few that I'm still discovering one by one. "cron", "shutdown" is no longer in the default debian path, I think ulimit was another one.
But at least I don't wake up one morning with the whole interface rearranged.
cron is in /usr/sbin (and is a daemon, not a command you'd ever run manually); shutdown is in /sbin; and ulimit is a shell builtin, not a standalone executable at all.
If I had to guess, I'd say that /sbin and /usr/sbin aren't on your $PATH for some reason. systemd is unlikely to be the culprit.
SystemD screwed with a few that I'm still discovering one by one. "cron", "shutdown" is no longer in the default debian path, I think ulimit was another one.
But at least I don't wake up one morning with the whole interface rearranged.