• Survived a host power interruption - https://twitter.com/shlomif/status/1048852791987527680 .

• I recall that some years back, rebooting with X running (because input was not enabled) has FUBARed the /etc directory prompting a reinstall, so FreeBSD on VirtualBox has come a long way.

On Linux they are almost always in /usr/bin/ only:

• script to fix the perl shebang line

• /usr/bin/env is your friend.

• man hier(7) explains the difference.

• One can call gmake

• No gmake on some older versions of Debian/Ubuntu/etc.

• Solution for Debian:

  mkdir -p "$HOME/bin"
  ln -sf /usr/bin/make "$HOME/bin/gmake"
  export PATH="$HOME/bin:$PATH"

• gmake alias under /usr/bin/ is present again in recent versions of Debian.

• Fixed in this commit by first checking for gm4 and then falling back on plain m4.

• No idea why.

• Sometimes cpanm -n (“no test”) helps.

• pkg install -y p5-Foo-Bar as root for other times.

• Fixed using a symlink on the FreeBSD system.

• Unhappy with this solution.

• On the “Hacker News” discussion, it was recommended to use xsltproc --nonet http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl foobar.xml ( Reference )

• The “-P” flag is not in the POSIX’s grep specification

• Solution:

  -        ) | grep -vP '^<\?xml ver' \
  +        ) | perl -p -0777 -e 's%\A<\?xml ver[^>]*>%%' \

• Does not exactly do the same operation, but even more correct.

• Perl is portable shell

  — Guy Keren

• https://unix.stackexchange.com/questions/108821/number-of-cores-on-freebsd

• nproc(1) is available in FreeBSD as of 13.2-RELEASE. ( Reference. )

• Added a small shell executable under ~/bin/nproc .