$cd test-folder/ $>1 $>2 $>3 $ls 1 2 3 $cd .. $>1 $>2 $cp -b 1 test-folder/ $cd test-folder/ $ls 1 1~ 2 3 $cd .. $export SIMPLE_BACKUP_SUFFIX=bc $cp -b 2 test-folder/ $cd test-folder/ $ls 1 1~ 2 2bc 3 $cd .. $export SIMPLE_BACKUP_SUFFIX=.bc $cp -b 2 test-folder/ $cd test-folder/ $ls 1 1~ 2 2bc …
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