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ruby で nginx -V から version を抽出 (1.8 対応)
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| `nginx -V 2>&1` |
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| require 'open3' | |
| stdin, stdout, stderr = Open3.popen3("nginx -V") | |
| version = stderr.read.match(/nginx version: nginx\/(\d\.\d\.\d)/)[1] | |
| p version |
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