Created
April 21, 2014 06:43
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| trial=0; until apt-get update -y || [ $trial -eq 4 ]; do sleep $((2**++trial )); done |
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いまのところ数分あけるとうまくいくことが多いようなので、
5_2_*trial++などとして、5の部分を適当にかえると
リトライ1回目: 5秒
リトライ2回目: 10秒
リトライ2回目: 20秒
リトライ2回目: 40秒
のように倍々に待ち時間が増えていい感じかもしれません