* If one is going to have a Linux/FreeBSD/Solaris split, one needs to apply it to section 1. "lsbrelease" is a Linux-based operating system only command.
* Debian now includes /etc/os-release . Interestingly, so too does DragonFlyBSD (but not FreeBSD).
* "last reboot" has been supposedly superseded in systemd operating systems, by "journalctl -b".
* Not even everyone has /var/log/messages any more, or /var/log/warn . Even Debian has, just last month, made the systemd journal its primary on-disc storage.
* Use "vipw" to avoid having to remember to recompile master.passwd . It respects $EDITOR .
* The ps flags are 30 years out of date for the BSDs. BSD switched ps to use getopt() at the start of the 1990s, and they've officially started with a minus sign all of that time since.
* The better trace program on FreeBSD, and the only one on OpenBSD, is the original BSD ktrace/kdump .
In section 3:
* FreeBSD partitioning is done with "gpart".
I stopped there. There are probably some howlers under installation and shells, given how outdated some of the other stuff was. Debian and Ubuntu changed /bin/sh to the Debian Almquist shell a decade and a bit ago. FreeBSD replaced pkg with pkg-ng in version 9. These are two very common errors that I see.
From section 1:
* "man hier" is out of date, alas. https://unix.stackexchange.com/a/567405/5132
* If one is going to have a Linux/FreeBSD/Solaris split, one needs to apply it to section 1. "lsbrelease" is a Linux-based operating system only command.
* Debian now includes /etc/os-release . Interestingly, so too does DragonFlyBSD (but not FreeBSD).
* "last reboot" has been supposedly superseded in systemd operating systems, by "journalctl -b".
* "atacontrol" was superseded by "camcontrol" in FreeBSD back in 2012. https://www.freebsd.org/releases/9.0R/relnotes-detailed.html...
* Not even everyone has /var/log/messages any more, or /var/log/warn . Even Debian has, just last month, made the systemd journal its primary on-disc storage.
* Use "vipw" to avoid having to remember to recompile master.passwd . It respects $EDITOR .
* Most Linux operating systems do not use run levels at all now. http://jdebp.uk./FGA/run-levels-are-history.html
In section 2:
* The ps flags are 30 years out of date for the BSDs. BSD switched ps to use getopt() at the start of the 1990s, and they've officially started with a minus sign all of that time since.
* The better trace program on FreeBSD, and the only one on OpenBSD, is the original BSD ktrace/kdump .
In section 3:
* FreeBSD partitioning is done with "gpart".
I stopped there. There are probably some howlers under installation and shells, given how outdated some of the other stuff was. Debian and Ubuntu changed /bin/sh to the Debian Almquist shell a decade and a bit ago. FreeBSD replaced pkg with pkg-ng in version 9. These are two very common errors that I see.