{"id":155410,"date":"2020-08-30T21:31:16","date_gmt":"2020-08-30T13:31:16","guid":{"rendered":"http:\/\/4563.org\/?p=155410"},"modified":"2020-08-30T21:31:16","modified_gmt":"2020-08-30T13:31:16","slug":"shell-%e8%84%9a%e6%9c%ac%e6%8e%a2%e6%b5%8b%e5%8f%98%e9%87%8f%e6%98%af%e5%90%a6%e4%b8%ba%e7%a9%ba-%e4%b8%ba%e4%bb%80%e4%b9%88%e8%a6%81%e5%8a%a0%e4%b8%aa%e5%89%8d%e7%bc%80","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=155410","title":{"rendered":"shell \u811a\u672c\u63a2\u6d4b\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a, \u4e3a\u4ec0\u4e48\u8981\u52a0\u4e2a\u524d\u7f00"},"content":{"rendered":"
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shell \u811a\u672c\u63a2\u6d4b\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a, \u4e3a\u4ec0\u4e48\u8981\u52a0\u4e2a\u524d\u7f00 <\/h1>\n

<\/p>\n

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\u8cc7\u6df1\u5927\u4f6c : DinoStray <\/span> <\/i> 5<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n
if [ \"x$KAFKA_HEAP_OPTS\" = \"x\" ]; then     export KAFKA_HEAP_OPTS=\"-Xmx1G -Xms1G\" fi <\/code><\/pre>\n
\u8fd9\u4e2a shell \u811a\u672c, if \u8bed\u53e5, \u662f\u60f3\u63a2\u6d4b\u73af\u5883\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a, \u4e3a\u5565\u4e0d\u76f4\u63a5<\/p>\n
if [ \"$KAFKA_HEAP_OPTS\" = \"\" ] <\/code><\/pre>\n
\u800c\u662f\u5728\u524d\u9762\u52a0\u4e86\u4e2a x<\/p>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (5<\/span>)        <\/div>\n
 <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : lcdtyph <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4e3a\u4e86\u517c\u5bb9\u6027\uff0c\u4e00\u4e9b shell \u7684\u5b9e\u73b0\u65e0\u6cd5\u6b63\u786e\u5904\u7406 [ -n = “” ] \u8fd9\u79cd\u60c5\u51b5\uff0c\u5f53\u4f60\u6d4b\u8bd5\u7684\u90a3\u4e2a\u53d8\u91cf\u4e2a\u662f\u6bd4\u8f83\u7279\u6b8a\uff08\u6bd4\u5982”-n”\uff09\u5728\u67d0\u4e9b shell \u4e0b\u4f1a\u51fa\u9519                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : wd <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u9648\u5e74\u964b\u4e60 \u8001\u7248\u672c\uff08\u5f88\u8001\u7684\u90a3\u79cd\uff0c\u6211\u611f\u89c9\u6211\u5f88\u65e9\u5c31\u770b\u5230\u8fd9\u4e2a\u5199\u6cd5\u4e86\uff09 bash \u53ef\u80fd\u4f1a\u6709\u95ee\u9898\u5427                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : love <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4e0d\u662f\u5e94\u8be5 [[ -z $a ]] && echo empty || echo notempty
    \u5417                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : laycher <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @love #3 \u6211\u4e5f\u89c9\u5f97\u662f\u8fd9\u79cd\u5199\u6cd5\u3002\u4e0d\u662f-z \u5224\u65ad\u7684\u5417\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : SiliusMo <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u524d\u7f00\u662f\u4e3a\u4e86\u9632\u6b62\u4e00\u4e9b shell \u5728\u53d8\u91cf\u672a\u5b9a\u4e49\u7684\u60c5\u51b5\u4e0b\u7701\u7565\u8fd9\u4e2a\u53d8\u91cf\u800c\u4e0d\u662f\u66ff\u6362\u4e3a\u7a7a\u5b57\u7b26\u4e32\uff0c\u4ece\u800c\u4f7f\u4ee3\u7801\u53d8\u4e3a `if [ = x ]` \u3002\u8fd9\u6837\u4f1a\u62a5 \u53c2\u6570\u8fc7\u5c11 \u7684\u9519\u8bef\u3002<\/p>\n
    \u7136\u800c\u628a\u53d8\u91cf\u90fd\u7528\u53cc\u5f15\u53f7\u62ec\u8d77\u6765\u5df2\u7ecf\u89e3\u51b3\u4e86\u8fd9\u4e2a\u95ee\u9898\u2026\u6240\u4ee5\u4e3b\u8bf4\u7684\u7b2c\u4e8c\u79cd\u60c5\u51b5\u662f\u5b8c\u5168\u53ef\u4ee5\u7684\uff0c\u8fd9\u91cc\u52a0\u524d\u7f00 x \u5e94\u8be5\u662f\u591a\u4f59\u7684\u3002                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"
    shell \u811a\u672c\u63a2\u6d4b\u53d8\u91cf\u662f\u5426\u4e3a\u7a7a,…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/155410"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=155410"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/155410\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=155410"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=155410"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=155410"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}