{"id":1900,"date":"2025-07-17T14:37:24","date_gmt":"2025-07-17T05:37:24","guid":{"rendered":"https:\/\/route-zero.com\/recruit\/?post_type=route&#038;p=1900"},"modified":"2026-02-17T14:43:09","modified_gmt":"2026-02-17T05:43:09","slug":"tail-grep%e3%81%a7%e3%83%aa%e3%82%a2%e3%83%ab%e3%82%bf%e3%82%a4%e3%83%a0%e3%83%ad%e3%82%b0%e7%9b%a3%e8%a6%96%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95","status":"publish","type":"route","link":"https:\/\/route-zero.com\/recruit\/route\/1900\/","title":{"rendered":"tail grep\u3067\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30ed\u30b0\u76e3\u8996\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<div>\n<h2>`tail`+`grep`\u3067\u7206\u901f\uff01\u30ed\u30b0\u76e3\u8996\u306e\u60a9\u307f\u89e3\u6c7a<\/h2>\n<p>\n    \u300c\u5927\u91cf\u306e\u30b5\u30fc\u30d0\u30fc\u30ed\u30b0\u3001\u5fc5\u8981\u306a\u60c5\u5831\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u2026\u300d\u300cGUI\u30a8\u30c7\u30a3\u30bf\u304c\u56fa\u307e\u308b\u2026\u300dWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u969c\u5bb3\u767a\u751f\u6642\u3001\u305d\u3093\u306a\u7126\u308a\u3092\u611f\u3058\u305f\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u304b\uff1f<br \/>\n    \u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30ed\u30b0\u3092\u76ee\u8996\u3067\u8ffd\u3046\u4f5c\u696d\u306f\u3001\u975e\u52b9\u7387\u3067\u7cbe\u795e\u7684\u306a\u8ca0\u62c5\u3082\u5927\u304d\u3044\u3082\u306e\u3067\u3059\u3002\n  <\/p>\n<p>\n    \u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3042\u308b<strong>\u79c1\u305f\u3061<\/strong>\u306e\u3001\u305d\u306e\u60a9\u307f\u89e3\u6c7a\u3059\u308b\u5f37\u529b\u306a\u30ef\u30f3\u30e9\u30a4\u30ca\u30fc\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<br \/>\n    Linux\u30b3\u30de\u30f3\u30c9\u306e<strong>tail<\/strong>\u3068<strong>grep<\/strong>\u3092\u7d44\u307f\u5408\u308f\u305b\u3001\u81a8\u5927\u306a\u30ed\u30b0\u304b\u3089\u7279\u5b9a\u306e\u30a8\u30e9\u30fc\u3084\u30d1\u30bf\u30fc\u30f3\u3092\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306b\u52b9\u7387\u7684\u306b\u62bd\u51fa\u3002<br \/>\n    \u969c\u5bb3\u5bfe\u5fdc\u306e\u30ea\u30fc\u30c9\u30bf\u30a4\u30e0\u3092\u5287\u7684\u306b\u77ed\u7e2e\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af\u3092\u5fb9\u5e95\u89e3\u8aac\u3057\u307e\u3059\u3002\n  <\/p>\n<p>\n    \u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3081\u3070\u3001\u3042\u306a\u305f\u306e\u30ed\u30b0\u76e3\u8996\u30b9\u30ad\u30eb\u306f\u98db\u8e8d\u7684\u306b\u5411\u4e0a\u3002\u300c\u30ed\u30b0\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u300d\u3068\u7126\u308b\u3053\u3068\u306f\u3001\u3082\u3046\u3042\u308a\u307e\u305b\u3093\u3002<br \/>\n    \u5177\u4f53\u7684\u306a\u30b3\u30de\u30f3\u30c9\u4f8b\u304b\u3089\u3001\u610f\u5916\u3068\u77e5\u3089\u308c\u3066\u3044\u306a\u3044<strong>&#8211;line-buffered<\/strong>\u306e\u91cd\u8981\u6027\u3001\u904b\u7528\u6539\u5584\u306b\u7e4b\u304c\u308b\u30d2\u30f3\u30c8\u307e\u3067\u3002<br \/>\n    \u73fe\u5834\u3067\u672c\u5f53\u306b\u5f79\u7acb\u3064\u60c5\u5831\u3092\u304a\u5c4a\u3051\u3057\u307e\u3059\u3002\n  <\/p>\n<hr \/>\n<h2>1. \u30b7\u30b9\u30c6\u30e0\u306e\u60b2\u9cf4\u3092\u805e\u304d\u9003\u3059\u306a\uff01\u30ed\u30b0\u76e3\u8996\u3067\u969c\u5bb3\u5bfe\u5fdc\u3092\u7206\u901f\u5316<\/h2>\n<p>\n    \u30b7\u30b9\u30c6\u30e0\u304c\u767a\u3059\u308b\u300c\u60b2\u9cf4\u300d\u306b\u6c17\u3065\u304f\u306e\u304c\u9045\u308c\u308b\u3068\u3001\u30b5\u30fc\u30d3\u30b9\u505c\u6b62\u3084\u9867\u5ba2\u4f53\u9a13\u306e\u4f4e\u4e0b\u306b\u76f4\u7d50\u3057\u307e\u3059\u3002<br \/>\n    \u969c\u5bb3\u5bfe\u5fdc\u306e\u521d\u52d5\u3092\u8fc5\u901f\u5316\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u30ed\u30b0\u76e3\u8996\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u300c\u6c17\u3065\u304f\u306e\u304c\u9045\u3044\u300d\u3092\u306a\u304f\u3057\u3001\u30ed\u30b0\u304b\u3089\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306b\u30b7\u30b9\u30c6\u30e0\u306e\u72b6\u614b\u3092\u628a\u63e1\u3059\u308b\u91cd\u8981\u6027\u306f\u3001\u904b\u7528\u306b\u643a\u308f\u308b\u30a8\u30f3\u30b8\u30cb\u30a2\u306b\u3068\u3063\u3066\u5171\u901a\u8a8d\u8b58\u3067\u3057\u3087\u3046\u3002\n  <\/p>\n<p>\n    \u7279\u306b\u3001<strong>tail<\/strong>\u30b3\u30de\u30f3\u30c9\u3068<strong>grep<\/strong>\u30b3\u30de\u30f3\u30c9\u306f\u3001Linux\u74b0\u5883\u306b\u304a\u3051\u308b\u30ed\u30b0\u76e3\u8996\u306e\u5f37\u529b\u306a\u5473\u65b9\u3067\u3059\u3002\uff08Docker\u306b\u3088\u308b\u74b0\u5883\u69cb\u7bc9\u306b\u3064\u3044\u3066\u306f<a\n      href=\"https:\/\/route-zero.com\/recruit\/route\/1123\/\"\n      >\u300eDocker\u3068\u306f\uff1f\u521d\u5fc3\u8005\u5411\u3051\uff1a\u57fa\u790e\u304b\u3089\u5b9f\u8df5\u307e\u3067\u5b8c\u5168\u30ac\u30a4\u30c9\u300f<\/a\n    >\u3092\u3054\u53c2\u7167\u304f\u3060\u3055\u3044\uff09<br \/>\n    \u3053\u308c\u3089\u306f\u3001\u81a8\u5927\u306a\u91cf\u306e\u30ed\u30b0\u306e\u4e2d\u304b\u3089\u3001\u5fc5\u8981\u306a\u60c5\u5831\u3060\u3051\u3092\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u62bd\u51fa\u3057\u3001\u969c\u5bb3\u306e\u5146\u5019\u3084\u767a\u751f\u6e90\u3092\u7d20\u65e9\u304f\u7279\u5b9a\u3059\u308b\u624b\u52a9\u3051\u3092\u3057\u307e\u3059\u3002<br \/>\n    \u30b7\u30f3\u30d7\u30eb\u306a\u30b3\u30de\u30f3\u30c9\u306e\u7d44\u307f\u5408\u308f\u305b\u306a\u304c\u3089\u3001\u305d\u306e\u52b9\u679c\u306f\u7d76\u5927\u3002\u3042\u306a\u305f\u306e\u30b7\u30b9\u30c6\u30e0\u904b\u7528\u3092\u5927\u304d\u304f\u6539\u5584\u3059\u308b\u9375\u3068\u306a\u308a\u307e\u3059\u3002\n  <\/p>\n<hr \/>\n<h2>2. \u57fa\u790e\u304b\u3089\u5fdc\u7528\u3078\uff1a`tail -f`\u3068`grep`\u3067\u30ed\u30b0\u3092&#8221;\u30cf\u30c3\u30af&#8221;\u3059\u308b<\/h2>\n<p>\n    \u30ed\u30b0\u306e\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u76e3\u8996\u306b\u306f\u3001<strong>tail -f<\/strong>\u3068<strong>grep<\/strong>\u306e\u7d44\u307f\u5408\u308f\u305b\u304c\u57fa\u672c\u3067\u3059\u3002<br \/>\n    <strong>tail -f<\/strong>\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u672b\u5c3e\u3092\u7d99\u7d9a\u7684\u306b\u8868\u793a\u3057\u3001\u65b0\u3057\u3044\u884c\u304c\u8ffd\u52a0\u3055\u308c\u308b\u305f\u3073\u306b\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u51fa\u529b\u3057\u307e\u3059\u3002<br \/>\n    \u3053\u308c\u306b\u3088\u308a\u3001\u523b\u3005\u3068\u5909\u5316\u3059\u308b\u30b7\u30b9\u30c6\u30e0\u306e\u72b6\u614b\u3092\u30e9\u30a4\u30d6\u3067\u628a\u63e1\u3067\u304d\u307e\u3059\u3002\n  <\/p>\n<pre><code class=\"language-bash\">tail -f \/var\/log\/syslog\r\n<\/code><\/pre>\n<p>\n    \u6b21\u306b\u3001<strong>grep<\/strong>\u306f\u3001\u5165\u529b\u3055\u308c\u305f\u30c6\u30ad\u30b9\u30c8\u306e\u4e2d\u304b\u3089\u7279\u5b9a\u306e\u30d1\u30bf\u30fc\u30f3\u306b\u4e00\u81f4\u3059\u308b\u884c\u3092\u62bd\u51fa\u3059\u308b\u30b3\u30de\u30f3\u30c9\u3067\u3059\u3002<br \/>\n    \u4f8b\u3048\u3070\u3001\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3060\u3051\u3092\u629c\u304d\u51fa\u3057\u305f\u3044\u5834\u5408\u306b\u5a01\u529b\u3092\u767a\u63ee\u3057\u307e\u3059\u3002\n  <\/p>\n<pre><code class=\"language-bash\">grep \"ERROR\" \/var\/log\/syslog\r\n<\/code><\/pre>\n<p>\n    \u3053\u306e\u4e8c\u3064\u306e\u30b3\u30de\u30f3\u30c9\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u6d41\u308c\u308b\u30ed\u30b0\u306e\u4e2d\u304b\u3089\u3001\u7279\u5b9a\u306e\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u542b\u3080\u884c\u3060\u3051\u3092\u62bd\u51fa\u3057\u3066\u8868\u793a\u3067\u304d\u307e\u3059\u3002<br \/>\n    \u3053\u306e\u9023\u643a\u306f\u300c\u30d1\u30a4\u30d7\uff08<strong>|<\/strong>\uff09\u300d\u3092\u4f7f\u3063\u3066\u884c\u308f\u308c\u307e\u3059\u3002<br \/>\n    <strong>tail -f<\/strong>\u306e\u51fa\u529b\u304c<strong>grep<\/strong>\u306e\u5165\u529b\u3068\u306a\u308a\u3001\u30c7\u30fc\u30bf\u304c\u4e00\u65b9\u901a\u884c\u3067\u6d41\u308c\u308b\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002\n  <\/p>\n<pre><code class=\"language-bash\">tail -f \/var\/log\/syslog | grep \"ERROR\"\r\n<\/code><\/pre>\n<blockquote>\n<p>\n      <strong>\u7528\u8a9e\u89e3\u8aac\uff1atail<\/strong><br \/>\n      \u30d5\u30a1\u30a4\u30eb\u306e\u672b\u5c3e\u3092\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u8868\u793a\u3057\u3001\u8ffd\u8a18\u3055\u308c\u308b\u5185\u5bb9\u3092\u76e3\u8996\u3059\u308bLinux\u30b3\u30de\u30f3\u30c9\u3002\n    <\/p>\n<p>\n      <strong>\u7528\u8a9e\u89e3\u8aac\uff1agrep<\/strong><br \/>\n      \u30c6\u30ad\u30b9\u30c8\u306e\u4e2d\u304b\u3089\u7279\u5b9a\u306e\u30d1\u30bf\u30fc\u30f3\uff08\u6587\u5b57\u5217\u3084\u6b63\u898f\u8868\u73fe\uff09\u306b\u4e00\u81f4\u3059\u308b\u884c\u3092\u62bd\u51fa\u3059\u308bLinux\u30b3\u30de\u30f3\u30c9\u3002\uff08Linux\u30b3\u30de\u30f3\u30c9\u5168\u822c\u306b\u3064\u3044\u3066\u306f<a href=\"https:\/\/route-zero.com\/recruit\/route\/1565\/\"\n        >\u300eLinux Shell\u306e\u57fa\u672c\u3068\u4f7f\u3044\u65b9\uff5c\u521d\u5fc3\u8005\u5411\u3051\u30b3\u30de\u30f3\u30c9\u4e00\u89a7\u3068\u30a8\u30e9\u30fc\u89e3\u6c7a\u6cd5\u300f<\/a\n      >\u3092\u3054\u53c2\u7167\u304f\u3060\u3055\u3044\uff09\n    <\/p>\n<p>\n      <strong>\u7528\u8a9e\u89e3\u8aac\uff1a\u30d1\u30a4\u30d7\uff08<strong>|<\/strong>\uff09<\/strong><br \/>\n      \u3042\u308b\u30b3\u30de\u30f3\u30c9\u306e\u6a19\u6e96\u51fa\u529b\u3092\u5225\u306e\u30b3\u30de\u30f3\u30c9\u306e\u6a19\u6e96\u5165\u529b\u306b\u63a5\u7d9a\u3057\u3001\u51e6\u7406\u7d50\u679c\u3092\u9023\u7d9a\u3057\u3066\u6e21\u3059\u4ed5\u7d44\u307f\u3002\n    <\/p>\n<\/blockquote>\n<h3>\u306a\u305c\u5fc5\u8981\uff1f<strong>&#8211;line-buffered<\/strong>\u306e\u9b54\u6cd5\u3068\u30d0\u30c3\u30d5\u30a1\u306e\u4ed5\u7d44\u307f<\/h3>\n<p>\n    <strong>tail -f<\/strong>\u3068<strong>grep<\/strong>\u3092\u30d1\u30a4\u30d7\u3067\u7e4b\u3050\u969b\u3001\u60f3\u5b9a\u901a\u308a\u306e\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306a\u51fa\u529b\u304c\u5f97\u3089\u308c\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n    \u3053\u308c\u306f\u3001<strong>grep<\/strong>\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u51fa\u529b\u3092\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u3059\u308b\u6027\u8cea\u3092\u6301\u3064\u305f\u3081\u3067\u3059\u3002<br \/>\n    \u901a\u5e38\u3001<strong>grep<\/strong>\u306f\u52b9\u7387\u5316\u306e\u305f\u3081\u306b\u4e00\u5b9a\u91cf\u306e\u30c7\u30fc\u30bf\u304c\u8caf\u307e\u308b\u304b\u3001\u51e6\u7406\u304c\u7d42\u4e86\u3059\u308b\u307e\u3067\u51fa\u529b\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002\n  <\/p>\n<p>\n    \u3057\u304b\u3057\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u76e3\u8996\u306b\u304a\u3044\u3066\u306f\u3001\u3053\u306e\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u304c\u81f4\u547d\u7684\u3067\u3059\u3002<br \/>\n    \u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u306e\u304c<strong>grep<\/strong>\u306e<strong>&#8211;line-buffered<\/strong>\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u3059\u3002<br \/>\n    \u3053\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4ed8\u4e0e\u3059\u308b\u3053\u3068\u3067\u3001<strong>grep<\/strong>\u306f\u884c\u5358\u4f4d\u3067\u5373\u5ea7\u306b\u51fa\u529b\u3092\u884c\u3046\u3088\u3046\u306b\u306a\u308a\u3001\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u306b\u3088\u308b\u9045\u5ef6\u3092\u89e3\u6d88\u3002<br \/>\n    \u771f\u306e\u610f\u5473\u3067\u306e\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u76e3\u8996\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002\n  <\/p>\n<pre><code class=\"language-bash\">tail -f \/var\/log\/syslog | grep --line-buffered \"ERROR\"\r\n<\/code><\/pre>\n<blockquote>\n<p>\n      <strong>\u7528\u8a9e\u89e3\u8aac\uff1a&#8211;line-buffered<\/strong><br \/>\n      <strong>grep<\/strong>\u30b3\u30de\u30f3\u30c9\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u3001\u51fa\u529b\u3092\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u305b\u305a\u306b\u884c\u5358\u4f4d\u3067\u5373\u5ea7\u306b\u884c\u3046\u3088\u3046\u306b\u6307\u793a\u3057\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u51fa\u529b\u3092\u53ef\u80fd\u306b\u3059\u308b\u3002\n    <\/p>\n<\/blockquote>\n<p>\u3053\u306e\u9b54\u6cd5\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u3067\u3001\u969c\u5bb3\u767a\u751f\u6642\u306e\u30bf\u30a4\u30e0\u30e9\u30b0\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3001\u3088\u308a\u8fc5\u901f\u306a\u5bfe\u5fdc\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<hr \/>\n<h2>3. \u3010\u30b3\u30d4\u30da\u3067\u5373\u89e3\u6c7a\u3011\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30ed\u30b0\u62bd\u51fa\u30ef\u30f3\u30e9\u30a4\u30ca\u30fc\u96c6<\/h2>\n<p>\n    \u3053\u3053\u304b\u3089\u306f\u3001\u5b9f\u969b\u306e\u904b\u7528\u3067\u906d\u9047\u3059\u308b\u69d8\u3005\u306a\u30b7\u30ca\u30ea\u30aa\u306b\u5bfe\u5fdc\u3059\u308b\u305f\u3081\u306e\u3001\u5b9f\u8df5\u7684\u306a\u30ef\u30f3\u30e9\u30a4\u30ca\u30fc\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<br \/>\n    \u3053\u308c\u3089\u306e\u30b3\u30de\u30f3\u30c9\u306f\u3001\u3042\u306a\u305f\u306e\u969c\u5bb3\u5bfe\u5fdc\u3092\u5287\u7684\u306b\u52b9\u7387\u5316\u3059\u308b\u3067\u3057\u3087\u3046\u3002\n  <\/p>\n<blockquote>\n<p>\n      <strong>\u7528\u8a9e\u89e3\u8aac\uff1aNginx<\/strong><br \/>\n      \u9ad8\u6027\u80fd\u306aWeb\u30b5\u30fc\u30d0\u30fc\u304a\u3088\u3073\u30ea\u30d0\u30fc\u30b9\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\u3002\n    <\/p>\n<p>\n      <strong>\u7528\u8a9e\u89e3\u8aac\uff1aApache<\/strong><br \/>\n      \u6700\u3082\u5e83\u304f\u5229\u7528\u3055\u308c\u3066\u3044\u308bWeb\u30b5\u30fc\u30d0\u30fc\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306e\u4e00\u3064\u3002\n    <\/p>\n<p>\n      <strong>\u7528\u8a9e\u89e3\u8aac\uff1aMySQL<\/strong><br \/>\n      \u4e16\u754c\u4e2d\u3067\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u308b\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u306e\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\uff08RDBMS\uff09\u3002\uff08MySQL\u306b\u3064\u3044\u3066\u306f<a href=\"https:\/\/route-zero.com\/recruit\/route\/1811\/\"\n        >\u300eOracle MySQL \u9055\u3044\u30927\u3064\u306e\u8996\u70b9\u3067\u5fb9\u5e95\u6bd4\u8f03\uff5c\u79fb\u884c\u30fb\u9078\u5b9a\u3067\u8ff7\u308f\u306a\u3044\u6700\u65b0\u30ac\u30a4\u30c9\u300f<\/a\n      >\u3092\u3054\u53c2\u7167\u304f\u3060\u3055\u3044\uff09\n    <\/p>\n<\/blockquote>\n<h3>\u30b7\u30ca\u30ea\u30aa\u5225\uff01\u969c\u5bb3\u767a\u751f\u6642\u306b\u5f79\u7acb\u3064\u30ef\u30f3\u30e9\u30a4\u30ca\u30fc<\/h3>\n<ul>\n<li>\n      <strong>\u7279\u5b9a\u306e\u30a8\u30e9\u30fc\u3092\u691c\u77e5\u3057\u3001\u305d\u306e\u5468\u8fbaN\u884c\u3082\u8868\u793a<\/strong><br \/>\n      \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3060\u3051\u3067\u306a\u304f\u3001\u305d\u306e\u524d\u5f8c\u306e\u30ed\u30b0\u3082\u78ba\u8a8d\u3057\u305f\u3044\u5834\u5408\u306b\u6709\u52b9\u3067\u3059\u3002<br \/>\n      <strong>-C N<\/strong>\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u524d\u5f8c\u306bN\u884c\u3001<strong>-A N<\/strong>\u3067\u5f8cN\u884c\u3001<strong>-B N<\/strong>\u3067\u524dN\u884c\u3092\u8868\u793a\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-bash\">tail -f \/var\/log\/nginx\/error.log | grep --line-buffered -C 5 \"Failed to connect\"\r\n<\/code><\/pre>\n<p>\uff08\u4f8b\uff1a<strong>Nginx<\/strong>\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u304b\u3089\u300cFailed to connect\u300d\u3092\u691c\u51fa\u3057\u3001\u305d\u306e\u524d\u5f8c5\u884c\u3092\u8868\u793a\uff09<\/p>\n<\/li>\n<li>\n      <strong>\u9ad8\u8ca0\u8377\u6642\u306e\u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u306e\u30a2\u30af\u30bb\u30b9\u3092\u62bd\u51fa<\/strong><br \/>\n      \u30b5\u30fc\u30d3\u30b9\u304c\u91cd\u3044\u6642\u3001\u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u306e\u30a2\u30af\u30bb\u30b9\u304c\u539f\u56e0\u3067\u306a\u3044\u304b\u8abf\u67fb\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-bash\">tail -f \/var\/log\/apache2\/access.log | grep --line-buffered \"192.168.1.100\"\r\n<\/code><\/pre>\n<p>\uff08\u4f8b\uff1a<strong>Apache<\/strong>\u306e\u30a2\u30af\u30bb\u30b9\u30ed\u30b0\u304b\u3089IP\u30a2\u30c9\u30ec\u30b9\u300c192.168.1.100\u300d\u306e\u30a2\u30af\u30bb\u30b9\u3092\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u76e3\u8996\uff09<\/p>\n<\/li>\n<li>\n      <strong>\u7279\u5b9a\u306eURL\u3078\u306e\u30a2\u30af\u30bb\u30b9\u6570\u304c\u591a\u3044\u304b\u76e3\u8996<\/strong><br \/>\n      \u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u3084\u7279\u5b9a\u306e\u6a5f\u80fd\u3078\u306e\u30a2\u30af\u30bb\u30b9\u96c6\u4e2d\u3092\u76e3\u8996\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-bash\">tail -f \/var\/log\/httpd\/access.log | grep --line-buffered \"\/api\/v1\/heavy_process\" | wc -l\r\n<\/code><\/pre>\n<p>\n        \uff08\u4f8b\uff1a<strong>\/api\/v1\/heavy_process<\/strong>\u3078\u306e\u30a2\u30af\u30bb\u30b9\u884c\u6570\u3092\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u30ab\u30a6\u30f3\u30c8\u3002<strong>wc -l<\/strong\n        >\u306f\u884c\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3057\u307e\u3059\u304c\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u6027\u304c\u5931\u308f\u308c\u308b\u305f\u3081\u3001\u30ab\u30a6\u30f3\u30c8\u3057\u305f\u3044\u5834\u5408\u306f\u5225\u9014\u51e6\u7406\u304c\u5fc5\u8981\u3067\u3059\u3002\u76e3\u8996\u306e\u307f\u3067\u3042\u308c\u3070<strong>grep<\/strong>\u307e\u3067\u3002\uff09\n      <\/p>\n<\/li>\n<li>\n      <strong>\u7279\u5b9a\u306e\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u4ee5\u964d\u306e\u30ed\u30b0\u3092\u8ffd\u8de1<\/strong><br \/>\n      \u969c\u5bb3\u767a\u751f\u6642\u523b\u304c\u5224\u660e\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u305d\u306e\u6642\u70b9\u304b\u3089\u306e\u30ed\u30b0\u3092\u52b9\u7387\u7684\u306b\u8ffd\u8de1\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-bash\">tail -f \/var\/log\/application.log | grep --line-buffered \"2024-02-17 10:30:00\" -A 100\r\n<\/code><\/pre>\n<p>\uff08\u4f8b\uff1a\u6307\u5b9a\u6642\u523b\u4ee5\u964d\u306e\u30ed\u30b0\u3068\u3001\u305d\u306e\u5f8c\u306e100\u884c\u3092\u8868\u793a\uff09<\/p>\n<\/li>\n<\/ul>\n<h3>\u8907\u6570\u30ed\u30b0\u306e\u540c\u6642\u76e3\u8996\u3068\u52b9\u7387\u7684\u306a\u5207\u308a\u5206\u3051<\/h3>\n<p>\n    \u8907\u6570\u306e\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u540c\u6642\u306b\u76e3\u8996\u3057\u305f\u3044\u5834\u5408\u3001\u8907\u6570\u306e\u30bf\u30fc\u30df\u30ca\u30eb\u3092\u958b\u3044\u3066\u305d\u308c\u305e\u308c<strong>tail -f<\/strong>\u3092\u5b9f\u884c\u3059\u308b\u306e\u306f\u624b\u9593\u304c\u304b\u304b\u308a\u307e\u3059\u3002<br \/>\n    \u305d\u306e\u3088\u3046\u306a\u6642\u306b\u306f\u3001<strong>multitail<\/strong>\u306e\u3088\u3046\u306a\u30c4\u30fc\u30eb\u304c\u4fbf\u5229\u3067\u3059\u3002<br \/>\n    <strong>multitail<\/strong>\u306f\u3001\u4e00\u3064\u306e\u30bf\u30fc\u30df\u30ca\u30eb\u4e0a\u3067\u8907\u6570\u306e\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u540c\u6642\u306b\u8868\u793a\u3067\u304d\u3001\u8272\u5206\u3051\u6a5f\u80fd\u306a\u3069\u3082\u63d0\u4f9b\u3057\u307e\u3059\u3002\n  <\/p>\n<pre><code class=\"language-bash\">multitail \/var\/log\/nginx\/access.log \/var\/log\/nginx\/error.log \/var\/log\/mysql\/error.log\r\n<\/code><\/pre>\n<blockquote>\n<p>\n      <strong>\u7528\u8a9e\u89e3\u8aac\uff1amultitail<\/strong><br \/>\n      \u8907\u6570\u306e\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u4e00\u3064\u306e\u30bf\u30fc\u30df\u30ca\u30eb\u3067\u540c\u6642\u306b\u76e3\u8996\u3067\u304d\u308b\u30c4\u30fc\u30eb\u3002\n    <\/p>\n<\/blockquote>\n<p>\uff08\u4f8b\uff1a<strong>Nginx<\/strong>\u306e\u30a2\u30af\u30bb\u30b9\/\u30a8\u30e9\u30fc\u30ed\u30b0\u3068<strong>MySQL<\/strong>\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u3092\u540c\u6642\u306b\u76e3\u8996\uff09<\/p>\n<h3>\u3010\u30b1\u30fc\u30b9\u30b9\u30bf\u30c7\u30a3\u3011\u7279\u5b9a\u306e\u30a8\u30e9\u30fc\u30d1\u30bf\u30fc\u30f3\u3092\u691c\u77e5\u305b\u3088\uff01<\/h3>\n<p>\n    \u3042\u308b\u65e5\u3001Web\u30b5\u30fc\u30d3\u30b9\u306e\u4e00\u90e8\u3067\u30e6\u30fc\u30b6\u30fc\u304b\u3089\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3059\u308b\u3068\u3044\u3046\u5831\u544a\u304c\u5165\u308a\u307e\u3057\u305f\u3002<br \/>\n    \u307e\u305a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30ed\u30b0\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\n  <\/p>\n<ul>\n<li>\n      <strong>\u521d\u671f\u8abf\u67fb<\/strong>: \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30ed\u30b0\u304b\u3089\u300ctimeout\u300d\u3084\u300cerror\u300d\u3068\u3044\u3063\u305f\u30ad\u30fc\u30ef\u30fc\u30c9\u3067\u7d5e\u308a\u8fbc\u307f\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-bash\">tail -f \/var\/log\/app.log | grep --line-buffered -E \"timeout|error\"\r\n<\/code><\/pre>\n<\/li>\n<li>\n      <strong>\u7279\u5b9a\u306eAPI\u306b\u7d5e\u308a\u8fbc\u307f<\/strong>: \u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u304c\u7279\u5b9a\u306eAPI\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u3067\u767a\u751f\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u6c17\u3065\u304d\u307e\u3057\u305f\u3002<br \/>\n      \u4eca\u5ea6\u306f\u305d\u306eAPI\u3078\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u95a2\u9023\u3059\u308b\u30ed\u30b0\u306b\u7d5e\u308a\u8fbc\u307f\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-bash\">tail -f \/var\/log\/app.log | grep --line-buffered -E \"timeout|error\" | grep --line-buffered \"\/api\/v2\/items\"\r\n<\/code><\/pre>\n<\/li>\n<li>\n      <strong>\u95a2\u9023\u3059\u308b\u30e6\u30fc\u30b6\u30fcID\u3082\u78ba\u8a8d<\/strong>:<br \/>\n      \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3066\u3044\u308b\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u30e6\u30fc\u30b6\u30fcID\u3092\u7279\u5b9a\u3057\u3001\u305d\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u3069\u306e\u3088\u3046\u306a\u64cd\u4f5c\u3092\u884c\u3063\u3066\u3044\u305f\u304b\u3001\u4ed6\u306e\u30ed\u30b0\uff08\u4f8b\u3048\u3070\u8a8d\u8a3c\u30ed\u30b0\u306a\u3069\uff09\u3068\u7a81\u304d\u5408\u308f\u305b\u308b\u305f\u3081\u306b\u30e6\u30fc\u30b6\u30fcID\u3092\u62bd\u51fa\u3057\u307e\u3059\u3002<br \/>\n      \u3053\u308c\u306f\u3001<strong>awk<\/strong>\u306e\u3088\u3046\u306a\u30b3\u30de\u30f3\u30c9\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<pre><code class=\"language-bash\">tail -f \/var\/log\/app.log | grep --line-buffered \"\/api\/v2\/items\" | grep --line-buffered \"timeout\" | awk '{print $NF}' # (\u6700\u7d42\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u30e6\u30fc\u30b6\u30fcID\u304c\u3042\u308b\u60f3\u5b9a)\r\n<\/code><\/pre>\n<blockquote>\n<p>\n          <strong>\u7528\u8a9e\u89e3\u8aac\uff1aawk<\/strong><br \/>\n          \u30c6\u30ad\u30b9\u30c8\u30c7\u30fc\u30bf\u3092\u884c\u5358\u4f4d\u3067\u51e6\u7406\u3057\u3001\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3084\u66f8\u5f0f\u8a2d\u5b9a\u3092\u884c\u3046\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3002\n        <\/p>\n<\/blockquote>\n<p>\u3053\u306e\u4f8b\u306e\u3088\u3046\u306b\u3001\u6bb5\u968e\u7684\u306b\u30ed\u30b0\u3092\u7d5e\u308a\u8fbc\u3093\u3067\u3044\u304f\u3053\u3068\u3067\u3001\u81a8\u5927\u306a\u60c5\u5831\u306e\u4e2d\u304b\u3089\u539f\u56e0\u7279\u5b9a\u306e\u7cf8\u53e3\u3092\u898b\u3064\u3051\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<h2>5. \u3088\u304f\u3042\u308b\u7591\u554fQ&#038;A\uff1a\u30ed\u30b0\u76e3\u8996\u306e\u843d\u3068\u3057\u7a74\u3068\u89e3\u6c7a\u7b56<\/h2>\n<p>\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30ed\u30b0\u76e3\u8996\u3092\u5b9f\u8df5\u3059\u308b\u4e0a\u3067\u3001\u591a\u304f\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u62b1\u304d\u304c\u3061\u306a\u7591\u554f\u3068\u305d\u306e\u89e3\u6c7a\u7b56\u3092\u307e\u3068\u3081\u307e\u3057\u305f\u3002<\/p>\n<h3>\u300c\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3067\u8ffd\u8de1\u304c\u9014\u5207\u308c\u308b\u300d\u3092\u56de\u907f\u3059\u308b<\/h3>\n<blockquote>\n<p>\n      <strong>\u7528\u8a9e\u89e3\u8aac\uff1a\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3<\/strong><br \/>\n      \u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u304c\u80a5\u5927\u5316\u3059\u308b\u306e\u3092\u9632\u3050\u305f\u3081\u3001\u5b9a\u671f\u7684\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u5206\u5272\u30fb\u5727\u7e2e\u30fb\u524a\u9664\u3059\u308b\u4ed5\u7d44\u307f\u3002\n    <\/p>\n<p>\n      <strong>\u7528\u8a9e\u89e3\u8aac\uff1a\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf<\/strong><br \/>\n      \u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u304c\u30d5\u30a1\u30a4\u30eb\u3092\u8b58\u5225\u3059\u308b\u305f\u3081\u306b\u5272\u308a\u5f53\u3066\u308b\u756a\u53f7\u3002\n    <\/p>\n<\/blockquote>\n<p>\n    <strong>tail -f<\/strong>\u306f<strong>\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf<\/strong>\u3092\u8ffd\u8de1\u3059\u308b\u305f\u3081\u3001\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u306b\u3088\u3063\u3066\u30d5\u30a1\u30a4\u30eb\u304c\u30ea\u30cd\u30fc\u30e0\u30fb\u518d\u4f5c\u6210\u3055\u308c\u308b\u3068\u8ffd\u8de1\u304c\u9014\u5207\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n    \u3053\u308c\u3092\u56de\u907f\u3059\u308b\u306b\u306f\u3001<strong>tail -F<\/strong>\u30aa\u30d7\u30b7\u30e7\u30f3\uff08\u5927\u6587\u5b57\u306eF\uff09\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<br \/>\n    \u3053\u308c\u306b\u3088\u308a\u3001\u30d5\u30a1\u30a4\u30eb\u540d\u81ea\u4f53\u3092\u76e3\u8996\u3057\u3001\u30d5\u30a1\u30a4\u30eb\u304c\u518d\u4f5c\u6210\u3055\u308c\u3066\u3082\u8ffd\u8de1\u3092\u7d99\u7d9a\u3067\u304d\u307e\u3059\u3002\n  <\/p>\n<h3>\u5927\u91cf\u30ed\u30b0\u3067\u3082\u30bf\u30fc\u30df\u30ca\u30eb\u3092\u56fa\u3081\u306a\u3044\u5de5\u592b<\/h3>\n<blockquote>\n<p>\n      <strong>\u7528\u8a9e\u89e3\u8aac\uff1ahead<\/strong><br \/>\n      \u30d5\u30a1\u30a4\u30eb\u306e\u5148\u982d\u304b\u3089\u6307\u5b9a\u3057\u305f\u884c\u6570\u3060\u3051\u3092\u8868\u793a\u3059\u308bLinux\u30b3\u30de\u30f3\u30c9\u3002\n    <\/p>\n<p>\n      <strong>\u7528\u8a9e\u89e3\u8aac\uff1apv<\/strong><br \/>\n      \u30d1\u30a4\u30d7\u3067\u6e21\u3055\u308c\u308b\u30c7\u30fc\u30bf\u306e\u9032\u6357\u72b6\u6cc1\uff08\u901f\u5ea6\u3001\u51e6\u7406\u91cf\u306a\u3069\uff09\u3092\u8868\u793a\u3059\u308b\u30c4\u30fc\u30eb\u3002\n    <\/p>\n<\/blockquote>\n<p>\n    \u975e\u5e38\u306b\u5927\u91cf\u306e\u30ed\u30b0\u304c\u9ad8\u901f\u3067\u6d41\u308c\u308b\u5834\u5408\u3001\u30bf\u30fc\u30df\u30ca\u30eb\u304c\u56fa\u307e\u3063\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n    \u3053\u306e\u5834\u5408\u306f\u3001<strong>grep<\/strong>\u306e\u524d\u306b<strong>head<\/strong>\u30b3\u30de\u30f3\u30c9\u3067\u8868\u793a\u884c\u6570\u3092\u5236\u9650\u3057\u305f\u308a\u3001<strong>pv<\/strong>\u30b3\u30de\u30f3\u30c9\u3067\u8868\u793a\u901f\u5ea6\u3092\u8abf\u6574\u3057\u305f\u308a\u3059\u308b\u306a\u3069\u306e\u5de5\u592b\u304c\u6709\u52b9\u3067\u3059\u3002\n  <\/p>\n<pre><code class=\"language-bash\">tail -f \/var\/log\/app.log | head -n 100 # \u6700\u65b0100\u884c\u306e\u307f\u8868\u793a\r\n<\/code><\/pre>\n<h3>`tail -f`\u3068`grep`\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u30b5\u30fc\u30d0\u30fc\u8ca0\u8377\u304c\u9ad8\u3044\uff1f<\/h3>\n<blockquote>\n<p>\n      <strong>\u7528\u8a9e\u89e3\u8aac\uff1aCPU\u30ea\u30bd\u30fc\u30b9<\/strong><br \/>\n      Central Processing Unit\uff08\u4e2d\u592e\u51e6\u7406\u88c5\u7f6e\uff09\u304c\u6301\u3064\u51e6\u7406\u80fd\u529b\u3002\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c\u3084\u8a08\u7b97\u306b\u4f7f\u7528\u3055\u308c\u308b\u3002\n    <\/p>\n<p>\n      <strong>\u7528\u8a9e\u89e3\u8aac\uff1a\u6b63\u898f\u8868\u73fe<\/strong><br \/>\n      \u7279\u5b9a\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u6301\u3064\u6587\u5b57\u5217\u3092\u52b9\u7387\u7684\u306b\u8868\u73fe\u3059\u308b\u305f\u3081\u306e\u8a18\u6cd5\u3002\n    <\/p>\n<\/blockquote>\n<p>\n    \u4e00\u822c\u7684\u306b\u3001<strong>tail -f<\/strong>\u3068<strong>grep<\/strong>\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u3001\u5927\u91cf\u306e\u30ed\u30b0\u306b\u5bfe\u3057\u3066\u5b9f\u884c\u3057\u3066\u3082\u6975\u7aef\u306b\u9ad8\u3044\u8ca0\u8377\u3092\u304b\u3051\u308b\u3053\u3068\u306f\u7a00\u3067\u3059\u3002<br \/>\n    \u3057\u304b\u3057\u3001\u975e\u5e38\u306b\u9ad8\u983b\u5ea6\u3067\u30ed\u30b0\u304c\u51fa\u529b\u3055\u308c\u3001\u304b\u3064\u8907\u96d1\u306a\u6b63\u898f\u8868\u73fe\u3092<strong>grep<\/strong>\u306b\u4f7f\u7528\u3059\u308b\u5834\u5408\u306b\u306f\u3001<strong>CPU\u30ea\u30bd\u30fc\u30b9<\/strong>\u3092\u6d88\u8cbb\u3059\u308b\u53ef\u80fd\u6027\u306f\u3042\u308a\u307e\u3059\u3002<br \/>\n    \u8ca0\u8377\u304c\u61f8\u5ff5\u3055\u308c\u308b\u5834\u5408\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u7a3c\u50cd\u72b6\u6cc1\u3092\u76e3\u8996\u3057\u306a\u304c\u3089\u5229\u7528\u3057\u3001\u5fc5\u8981\u3067\u3042\u308c\u3070\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306e\u52b9\u7387\u5316\u3084\u3001\u30ed\u30b0\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u306e\u5c0e\u5165\u3092\u691c\u8a0e\u3057\u307e\u3057\u3087\u3046\u3002\n  <\/p>\n<h3>\u76e3\u8996\u5bfe\u8c61\u306e\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u304c\u591a\u3059\u304e\u308b\u5834\u5408\u306f\uff1f<\/h3>\n<p>\n    \u8907\u6570\u306e\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u540c\u6642\u306b\u76e3\u8996\u3057\u305f\u3044\u304c\u3001\u500b\u5225\u306b\u30b3\u30de\u30f3\u30c9\u3092\u6253\u3064\u306e\u304c\u9762\u5012\u306a\u5834\u5408\u306f\u3001\u524d\u8ff0\u306e<strong>multitail<\/strong>\u30b3\u30de\u30f3\u30c9\u304c\u4fbf\u5229\u3067\u3059\u3002<br \/>\n    \u307e\u305f\u3001<strong>for<\/strong>\u30eb\u30fc\u30d7\u3068<strong>tail -f<\/strong>\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u7c21\u6613\u7684\u306b\u76e3\u8996\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002\n  <\/p>\n<h3>\u30ed\u30b0\u306e\u5185\u5bb9\u3092\u8272\u5206\u3051\u3057\u3066\u898b\u3084\u3059\u304f\u3059\u308b\u306b\u306f\uff1f<\/h3>\n<p>\n    <strong>grep<\/strong>\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u30de\u30c3\u30c1\u3057\u305f\u6587\u5b57\u5217\u3092\u8272\u4ed8\u3051\u3057\u3066\u8868\u793a\u3059\u308b\u6a5f\u80fd\uff08<strong>&#8211;culor=auto<\/strong>\u307e\u305f\u306f<strong>&#8211;culor=always<\/strong>\uff09\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\n    \u3053\u308c\u306b\u3088\u308a\u3001\u30bf\u30fc\u30df\u30ca\u30eb\u306e\u8996\u8a8d\u6027\u3092\u9ad8\u3081\u3001\u5fc5\u8981\u306a\u60c5\u5831\u3092\u7d20\u65e9\u304f\u8b58\u5225\u3067\u304d\u307e\u3059\u3002\u30b7\u30a7\u30eb\u306b\u3088\u3063\u3066\u306f\u30a8\u30a4\u30ea\u30a2\u30b9\u8a2d\u5b9a\u3067<strong>grep &#8211;culor=auto<\/strong>\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u306b\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u3082\u591a\u3044\u3067\u3059\u3002\n  <\/p>\n<pre><code class=\"language-bash\">tail -f \/var\/log\/app.log | grep --line-buffered --culor=always \"ERROR\"\r\n<\/code><\/pre>\n<hr \/>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\n    &#x2705;\u672c\u8a18\u4e8b\u3067\u306f\u3001Linux\u74b0\u5883\u306b\u304a\u3051\u308b\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30ed\u30b0\u76e3\u8996\u306e\u5f37\u529b\u306a\u624b\u6cd5\u3068\u3057\u3066\u3001<strong>tail<\/strong>\u3068<strong>grep<\/strong>\u30b3\u30de\u30f3\u30c9\u306e\u7d44\u307f\u5408\u308f\u305b\u3092\u5fb9\u5e95\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002<br \/>\n    \u7279\u306b<strong>&#8211;line-buffered<\/strong>\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u91cd\u8981\u6027\u3084\u3001\u73fe\u5834\u3067\u5f79\u7acb\u3064\u5177\u4f53\u7684\u306a\u30ef\u30f3\u30e9\u30a4\u30ca\u30fc\u3001\u3055\u3089\u306b\u306f<strong>journalctl<\/strong>\u3084\u30ed\u30b0\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u3068\u306e\u8ce2\u3044\u4f7f\u3044\u5206\u3051\u6226\u7565\u306b\u3064\u3044\u3066\u3082\u3054\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3002\n  <\/p>\n<p>\n    \u3053\u308c\u3089\u306e\u77e5\u8b58\u3068\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7fd2\u5f97\u3059\u308b\u3053\u3068\u3067\u3001<strong>\u79c1\u305f\u3061<\/strong>\u306f\u81a8\u5927\u306a\u30ed\u30b0\u306e\u4e2d\u304b\u3089\u5fc5\u8981\u306a\u60c5\u5831\u3092\u8fc5\u901f\u306b\u62bd\u51fa\u3057\u3001\u969c\u5bb3\u767a\u751f\u6642\u306e\u539f\u56e0\u7279\u5b9a\u3084\u89e3\u6c7a\u307e\u3067\u306e\u6642\u9593\u3092\u5287\u7684\u306b\u77ed\u7e2e\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<br \/>\n    \u3082\u3046\u300c\u30ed\u30b0\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u300d\u3068\u7126\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002<br \/>\n    \u305c\u3072\u30b3\u30fc\u30c9\u3092\u30b3\u30d4\u30da\u3057\u3066\u3001\u307e\u305a\u306f\u52d5\u304b\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\n  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