{"title":"unset","provider_url":"https://hatena.blog","published":"2012-06-18 16:57:21","categories":["\u30b7\u30a7\u30eb\u30b9\u30af\u30ea\u30d7\u30c8"],"author_url":"https://blog.hatena.ne.jp/shigemk2/","description":"Linux\u30b3\u30de\u30f3\u30c9\u96c6 - \u3010 unset \u3011 \u5909\u6570\u306e\u5b9a\u7fa9\u3092\u89e3\u9664\u3059\u308b\uff1aITpro unset \u5909\u6570\u306e\u5b9a\u7fa9\u3092\u89e3\u9664\u3059\u308b\u3002 \u6307\u5b9a\u3057\u305f\u5909\u6570\u3084\u95a2\u6570\u3092\u524a\u9664\u3059\u308b\u3002 \u305f\u3060\u3057\uff0c\u30b7\u30a7\u30eb\u304c\u521d\u3081\u304b\u3089\u5229\u7528\u3057\u3066\u3044\u308b\u5909\u6570\u3084readonly\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u308b\u5909\u6570\u306f\u524a\u9664\u3067\u304d\u306a\u3044\u3002\u307e\u305f\u3001\u30d7\u30ed\u30bb\u30b9\u304c\u6d88\u3048\u308b\u3068\u81ea\u52d5\u7684\u306b\u5909\u6570\u3082\u6d88\u3048\u308b\u3002 # \u5909\u6570\u5b9a\u7fa9 FIRST_NAME='SHIGE' # 'SHIGE' echo $FIRST_NAME # \u5909\u6570\u89e3\u9664 unset FIRST_NAME # \u4f55\u3082\u8868\u793a\u3055\u308c\u306a\u3044 echo $FIRST_NAME","version":"1.0","type":"rich","author_name":"shigemk2","width":"100%","provider_name":"Hatena Blog","url":"https://www.shigemk2.com/entry/20120618/1340006241","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.shigemk2.com%2Fentry%2F20120618%2F1340006241\" title=\"unset - by shigemk2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":null,"height":"190","blog_title":"by shigemk2","blog_url":"https://www.shigemk2.com/"}