{"id":146,"date":"2017-12-18T15:21:04","date_gmt":"2017-12-18T15:21:04","guid":{"rendered":"http:\/\/www.liutianfeng.com\/?p=146"},"modified":"2018-01-12T13:20:17","modified_gmt":"2018-01-12T13:20:17","slug":"tr","status":"publish","type":"post","link":"https:\/\/www.liutianfeng.com\/?p=146","title":{"rendered":"tr"},"content":{"rendered":"<pre class=\"pure-highlightjs\"><code class=\"\"># man tr\r\ntr - translate or delete characters<\/code><\/pre>\n<p>\u8f6c\u6362\u6216\u8005\u5220\u9664\u5b57\u7b26<\/p>\n<p>tr\u6709\u51e0\u79cd\u6a21\u5f0f\uff1a\u4ea4\u4e92\u6a21\u5f0f\u3001\u7ba1\u9053\u6a21\u5f0f\u3001&lt;\u91cd\u5b9a\u5411<\/p>\n<pre class=\"pure-highlightjs\"><code class=\"\">USAGE:\r\ntr [OPTION]... SET1 [SET2]   \/\/ \u5c06SET1\u7684\u5b57\u7b26\uff0c\u6362\u6210SET2\uff0c\u4e00\u4e00\u5bf9\u5e94\uff0c\u5f53\u6709\u9009\u9879\u7684\u65f6\u5019\uff0cSET2\u6709\u65f6\u4e5f\u53ef\u4e0d\u52a0\r\n<strong>opt:<\/strong> -d: --delete\uff0c\u5220\u9664\u540e\u9762\u5b57\u7b26\u96c6\u4e2d\u7684\u5b57\u7b26\r\n<\/code><\/pre>\n<p>\u6765\u51e0\u4e2a\u5b9e\u4f8b\uff1a<\/p>\n<pre class=\"pure-highlightjs\"><code class=\"\">exp\uff1a\r\n# tr 'ab' 'AB'   \/\/ \u4ea4\u4e92\u6a21\u5f0f\uff0c\u56de\u8f66\u8fdb\u5165\u4ea4\u4e92\u8f93\u5165\u754c\u9762\uff0c\u5f15\u53f7\u53ef\u4ee5\u53bb\u6389\r\ntable\r\ntABle\r\nbegin\r\nBegin\r\n^C\r\n\r\n# tr 'abc' 'ABC' &lt; \/etc\/fstab   \/\/ \u91cd\u5b9a\u5411\u6a21\u5f0f\r\n\/dev\/vdA1 \/ ext3 noAtime,ACl,user_xAttr 1 1\r\nproC \/proC proC defAults 0 0\r\nsysfs \/sys sysfs noAuto 0 0\r\ndeBugfs \/sys\/kernel\/deBug deBugfs noAuto 0 0\r\ndevpts \/dev\/pts devpts mode=0620,gid=5 0 0\r\n\r\n# cat \/etc\/fstab |tr a-z A-Z |head -1   \/\/ \u7ba1\u9053\u6a21\u5f0f\r\n\/DEV\/VDA1 \/ EXT3 NOATIME,ACL,USER_XATTR 1 1\r\n\r\n\r\n# tr -d ab &lt; \/etc\/passwd |head -3   \/\/ -d\u5220\u9664\u5b57\u7b26\r\nroot:x:0:0:root:\/root:\/in\/sh\r\nin:x:1:1:in:\/in:\/sin\/nologin\r\ndemon:x:2:2:demon:\/sin:\/sin\/nologin<\/code><\/pre>\n<p>\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1a<a href=\"https:\/\/www.liutianfeng.com\">liutianfeng.com<\/a> &raquo; <a href=\"https:\/\/www.liutianfeng.com\/?p=146\">tr<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p># man tr tr &#8211; translate or delete characters \u8f6c\u6362\u6216\u8005\u5220\u9664\u5b57\u7b26 t [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/146"}],"collection":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=146"}],"version-history":[{"count":4,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/146\/revisions"}],"predecessor-version":[{"id":402,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/146\/revisions\/402"}],"wp:attachment":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=146"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=146"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=146"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}