{"published":"2025-04-06 12:00:00","description":"echo `expr $i \\* 3` 3 echo $((i * 3)) 3\u306a\u3093\u3067\u540c\u3058\u52d5\u304d\u3092\u3059\u308b\u306e\u304b\u308f\u304b\u3089\u3093\u30fb\u30fb\u30fb\u30fb hoge=`ls *.txt`\u3068 hoge=$(ls *.txt)\u304c\u540c\u3058\u52d5\u304d\u3092\u3059\u308b\u306e\u306f\u5927\u4e8b\u3067\u3059\u3088\u306d \u4e0b\u306e\u66f8\u304d\u65b9\u306e\u65b9\u304c\u3001\u30cd\u30b9\u30c8\u3057\u305f\u3068\u304d\u306b\u53ef\u8aad\u6027\u304c\u9ad8\u304f\u3066\u826f\u3044\u3089\u3057\u3044 \u30e9\u30f3\u30ad\u30f3\u30b0\u53c2\u52a0\u4e2d\u3067\u3059 \u2193\u30af\u30ea\u30c3\u30af\u3057\u3066\u3044\u305f\u3060\u3051\u308b\u3068\u5b09\u3057\u3044\u3067\u3059\u301c\u30e9\u30f3\u30ad\u30f3\u30b0\u53c2\u52a0\u4e2dPython \u30e9\u30f3\u30ad\u30f3\u30b0\u53c2\u52a0\u4e2dHTML \u30e9\u30f3\u30ad\u30f3\u30b0\u53c2\u52a0\u4e2dMac","blog_url":"https://coffee-guhaw.hateblo.jp/","width":"100%","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fcoffee-guhaw.hateblo.jp%2Fentry%2F2025%2F04%2F06%2F120000\" title=\"\u3010\u30b3\u30de\u30f3\u30c9\u3011expr\u3068\u540c\u3058\u52d5\u304d\u3092\u3059\u308b$(()) - Bus error\u3068Segmentation fault\u306b\u56f0\u3063\u305f\u3089\u898b\u308b\u30d6\u30ed\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"\u3010\u30b3\u30de\u30f3\u30c9\u3011expr\u3068\u540c\u3058\u52d5\u304d\u3092\u3059\u308b$(())","url":"https://coffee-guhaw.hateblo.jp/entry/2025/04/06/120000","author_url":"https://blog.hatena.ne.jp/coffee_kabu/","version":"1.0","author_name":"coffee_kabu","provider_name":"Hatena Blog","blog_title":"Bus error\u3068Segmentation fault\u306b\u56f0\u3063\u305f\u3089\u898b\u308b\u30d6\u30ed\u30b0","type":"rich","image_url":null,"height":"190","categories":["debian","mac","\u30b7\u30a7\u30eb\u30b3\u30de\u30f3\u30c9/\u30b7\u30a7\u30eb\u30b9\u30af\u30ea\u30d7\u30c8"]}