[cups] CUPS won't send my user name to the printer

[マスターズ イアン]

>The 'service' command is not universal - I think it's a Debianism. On Arch
>Linux and its derivatives, the command is 'systemctl'; I don't know about
>CentOS. Anyway, both Arch and Debian use systemd, but some things are named
>differently. So if 'service' doesn't work, try 'systemctl.'

Recent CentOS (until v6) used 'service'. From CentOS7, the command has changed to 'systemctl', but for the transition stage, 'service' still works.

ian