TO ADMINS: when trying to reply to the post above, I got:
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Yet, that was a misleading and utterly wrong message, since the reason was that the editing time had expired. It would be good if a correct message was issued, and mainly if there is no expiration time for editing. Thanks
Thanks, but doing it starts showing sizes of all items in disk, which are thousands and thus may take hours! So, I aborted it with "Command ." (no quotes).
I have found that the culprit for showing "Command not found" is that when the command is copied from this forum (message by Barney-15E; not message by Eau Rouge, which pastes OK) using Safari 11.0.3 (12604.5.6.1.1) on macOS 10.12.6 (16G1114), spaces are converted into non-breaking spaces (as the ones generated with Option space and can be seen on Microsoft Word selecting "Preferences - View - Show Non-Printing Characters". After changing them by standard spaces, the command (with or without slash at end)
sudo du -hcd 1 /.Spotlight-V100/
or
sudo du -hcd 1 /.Spotlight-V100
shows:
Last login: Sun Feb 11 09:45:09 on ttys000
[Mac:~] user% sudo du -hcd 1 /.Spotlight-V100
Password:
4.0K /.Spotlight-V100/Store-V1
80G /.Spotlight-V100/Store-V2
80G /.Spotlight-V100
80G total
[Mac:~] user%
I understand that it means that Spotlight index file of booting disk takes 80 GB. Is that correct? On the other hand, as indicated above, how to know the size of such Spotlight index file of Time Machine disk (not the booting disk). Thanks again for all.