Numbered backup with cp

touch woot

cp --backup=t woot woot2
ls
woot  woot2

cp --backup=t woot woot2
cp --backup=t woot woot2
cp --backup=t woot woot2

lst
total 20K
-rw-r--r-- 1 b b 4 Jul 18 00:00 woot
-rw-r--r-- 1 b b 4 Jul 18 00:01 woot2.~1~
-rw-r--r-- 1 b b 4 Jul 18 00:01 woot2.~2~
-rw-r--r-- 1 b b 4 Jul 18 00:01 woot2.~3~
-rw-r--r-- 1 b b 4 Jul 18 00:01 woot2

Verbose version

cp --backup=t -v woot woot2
'woot' -> 'woot2' (backup: 'woot2.~1~')
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