{"image_url":null,"provider_name":"Hatena Blog","categories":["Linux"],"url":"https://ryozi.hatenadiary.jp/entry/20120509/1336575373","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fryozi.hatenadiary.jp%2Fentry%2F20120509%2F1336575373\" title=\"\u30b7\u30a7\u30eb\u30b9\u30af\u30ea\u30d7\u30c8\u3067\u6587\u5b57\u5217\u3067\u4e0e\u3048\u3089\u308c\u305f\u76f8\u5bfe\u30d1\u30b9\u304b\u3089\u3001\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u7d76\u5bfe\u30d1\u30b9\u3092\u53d6\u5f97\u3059\u308b - \u65e5\u3005\u91cf\u7523\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_name":"ryousanngata","title":"\u30b7\u30a7\u30eb\u30b9\u30af\u30ea\u30d7\u30c8\u3067\u6587\u5b57\u5217\u3067\u4e0e\u3048\u3089\u308c\u305f\u76f8\u5bfe\u30d1\u30b9\u304b\u3089\u3001\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u7d76\u5bfe\u30d1\u30b9\u3092\u53d6\u5f97\u3059\u308b","blog_url":"https://ryozi.hatenadiary.jp/","type":"rich","height":"190","version":"1.0","blog_title":"\u65e5\u3005\u91cf\u7523","description":"cd\u3057\u3066pwd\u3059\u308b echo $(cd $(dirname '/usr/bin/perl'); pwd) # /usr/bin cd /usr/bin echo $(cd $(dirname 'perl'); pwd) # /usr/bin echo $(cd $(dirname '../bin/perl'); pwd) # /usr/bin \u3082\u3061\u308d\u3093cd\u306b\u5931\u6557\u3057\u305f\u3089\u30ab\u30ec\u30f3\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u60c5\u5831\u8fd4\u3057\u3061\u3083\u3046\u306e\u3067\u3001 test -d $(dirname $HOGE)\u3068\u304b\u3084\u3063\u3066\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3068\u304b\u3057\u3066\u8aa4\u9b54\u5316\u3059\u3002 this.sh /usr/bin/perl ../../../../../usr/bin/per\u2026","provider_url":"https://hatena.blog","width":"100%","author_url":"https://blog.hatena.ne.jp/ryousanngata/","published":"2012-05-09 23:56:13"}