Created
December 19, 2013 16:32
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カウントダウンbash ref: http://qiita.com/fk_2000/items/74711f8aeb55e934bf2b
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| (start=1; end=10; while [[ $start -le $end ]]; do clear; echo $(($end-$start)); sleep 1; start=$(($start+1)); done) |
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