'Don''t communicate by sharing memory.'

A line beginning with # is a comment and conventionally explains what is being
done or tested at the start of a new section of the script.

Commands are executed one at a time, and errors are checked for each command;
if any command fails unexpectedly, no subsequent commands in the script are
executed. The command prefix ! indicates that the command on the rest of the

The zoneinfo.zip archive contains time zone files compiled using
the code and data maintained as part of the IANA Time Zone Database.
The IANA asserts that the database is in the public domain.

For more information, see
https://www.iana.org/time-zones
ftp://ftp.iana.org/tz/code/tz-link.html
https://datatracker.ietf.org/doc/html/rfc6557