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Mnemonics

This page outlines stuff I stumble upon, remember that I actually know this, but still not use in my daily practice and forgot about. Shame on me, because I should use this!

Use the right tool for the work

install

Often there is a simple tool that does exactly what you want. Consider this piece of a bash script:

mkdir /etc/systemd/system/podman.service.d
chmod 0755 /etc/systemd/system/podman.service.d
chown root:root /etc/systemd/system/podman.service.d
cp podman.conf /etc/systemd/system/podman.service.d/
chmod 0644 /etc/systemd/system/podman.service.d/podman.conf
chown root:root /etc/systemd/system/podman.service.d/podman.conf

The above works perfectly well. Is it readable? Yes, probably. Still, there is a tool for this. Not often used in the wild, but mandatory for package maintainers - install. The sole purpose of this is tool is to install files with the correct mode and ownership in a single command. The above using install would then look like:

install -o root -g root -m 0755 -d /etc/systemd/system/podman.service.d
install -o root -g root -m 0644 podman.conf /etc/systemd/system/podman.service.d

More elegant, isn't it? So, go and use install from now on!


Last update: 2022-09-26