why this mv command works

Question

I found this mv command but I can't find why it works:

sudo  mv /usr/share/dbus-1 /services/org.freedesktop.Notification.service{,.disabled}

I can't find this syntax in the man page.

Are you sure there should be a space between /dbus-1 and /services? If not, then it is a simple brace expansion — steeldriver, May 20 '16 at 13:46

score 4 · Answer 1 · answered May 20 '16 at 13:55

In that position in a command, the {} indicate a list of alternatives, which in this case are "" and ".disabled". Try it yourself, with echo (and removing the space after /dbus-1:

$ echo /usr/share/dbus-1/services/org.freedesktop.Notification.service{,.disabled}
/usr/share/dbus-1/services/org.freedesktop.Notification.service /usr/share/dbus-1/services/org.freedesktop.Notification.service.disabled

why this mv command works

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