{"id":128,"date":"2017-11-06T10:43:06","date_gmt":"2017-11-06T02:43:06","guid":{"rendered":"http:\/\/www.wuchangsong.com\/?p=128"},"modified":"2017-11-06T10:43:06","modified_gmt":"2017-11-06T02:43:06","slug":"shell%e7%9a%84%e5%8f%98%e9%87%8f%e5%8a%9f%e8%83%bd%ef%bc%88%e4%ba%8c%ef%bc%89","status":"publish","type":"post","link":"http:\/\/www.wuchangsong.com\/?p=128","title":{"rendered":"shell\u7684\u53d8\u91cf\u529f\u80fd\uff08\u4e8c\uff09"},"content":{"rendered":"<h3>\u53d8\u91cf\u952e\u76d8\u8bfb\u53d6\uff0c\u6570\u7ec4\u4e0e\u58f0\u660e\uff1aread\uff0carray\uff0cdeclare<\/h3>\n<h4>1. read<\/h4>\n<p>\u8bfb\u53d6\u6765\u81ea\u952e\u76d8\u8f93\u5165\u7684\u53d8\u91cf\uff0c\u5e38\u88ab\u7528\u5728 shell script \u7684\u64b0\u5199\u5f53\u4e2d\u3002<\/p>\n<p>\u7528\u6cd5\uff1a<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"size-full wp-image-130\" src=\"http:\/\/www.wuchangsong.com\/wp-content\/uploads\/2017\/11\/QQ\u56fe\u724720171106091441.png\" alt=\"\" width=\"643\" height=\"215\" \/><\/p>\n<h4>2. declare \/ typeset<\/h4>\n<p>declare \u6216 typeset \u662f\u4e00\u6837\u7684\u529f\u80fd\uff0c\u5c31\u662f\u5728\u58f0\u660e\u53d8\u91cf\u7684\u7c7b\u578b\u3002\u5982\u679c\u4f7f\u7528 declare \u540e\u9762\u5e76\u6ca1\u6709\u63a5\u4efb\u4f55\u53c2\u6570\uff0c\u90a3\u4e48 bash \u5c31\u4f1a\u4e3b\u52a8\u7684\u5c06\u6240\u6709\u7684\u53d8\u91cf\u540d\u79f0\u4e0e\u5185\u5bb9\u901a\u901a\u53eb\u51fa\u6765\uff0c \u5c31\u597d\u50cf\u4f7f\u7528 set \u4e00\u6837\u3002<\/p>\n<p>\u7528\u6cd5\uff1adeclare [-aixr] variable<\/p>\n<p>\u53c2\u6570\uff1a<\/p>\n<div>-a \uff1a \u5c06\u540e\u9762\u540d\u4e3a variable \u7684\u53d8\u91cf\u5b9a\u4e49\u6210\u4e3a\u6570\u7ec4 (array) \u7c7b\u578b<\/div>\n<div>-i \uff1a \u5c06\u540e\u9762\u540d\u4e3a variable \u7684\u53d8\u91cf\u5b9a\u4e49\u6210\u4e3a\u6574\u6570\u6570\u5b57 (integer) \u7c7b\u578b<\/div>\n<div>-x \uff1a \u7528\u6cd5\u4e0e export \u4e00\u6837\uff0c \u5c31\u662f\u5c06\u540e\u9762\u7684 variable \u53d8\u6210\u73af\u5883\u53d8\u91cf\uff1b<\/div>\n<div>-r \uff1a \u5c06\u53d8\u91cf\u8bbe\u7f6e\u6210\u4e3a readonly \u7c7b\u578b\uff0c \u8be5\u53d8\u91cf\u4e0d\u53ef\u88ab\u66f4\u6539\u5185\u5bb9\uff0c \u4e5f\u4e0d\u80fd\u91cd\u8bbe<\/div>\n<div><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-132\" src=\"http:\/\/www.wuchangsong.com\/wp-content\/uploads\/2017\/11\/QQ\u56fe\u724720171106094321.png\" alt=\"\" width=\"448\" height=\"268\" \/><\/div>\n<h4>3. array<\/h4>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-133\" src=\"http:\/\/www.wuchangsong.com\/wp-content\/uploads\/2017\/11\/QQ\u56fe\u724720171106094743.png\" alt=\"\" width=\"544\" height=\"81\" \/><\/p>\n<p>\u66f4\u591a\u8be6\u60c5\u8bf7\u53c2\u7167\u300a\u9e1f\u54e5\u7684\u79c1\u623f\u83dc\u300b\u7b2c\u4e09\u7248 \u7b2c\u5341\u4e00\u7ae0<\/p>\n<h3>\u4e0e\u6587\u4ef6\u7cfb\u7edf\u53ca\u7a0b\u5e8f\u7684\u9650\u5236\u5173\u7cfb\uff1aulimit<\/h3>\n<p>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7bash \u9650\u5236\u7528\u6237\u7684\u67d0\u4e9b\u7cfb\u7edf\u8d44\u6e90\uff0c\u5305\u62ec\u6253\u5f00\u7684\u6587\u4ef6\u6570\u91cf\u3001\u53ef\u4ee5\u4f7f\u7528\u7684cpu \u65f6\u95f4\u3001\u53ef\u4ee5\u4f7f\u7528\u7684\u5185\u5b58\u603b\u91cf\u7b49\u3002\u5982\u4f55\u8bbe\u7f6e\uff1f\u7528ulimit\u5427<\/p>\n<p>ulimit [-SHacdfltu] [\u914d\u989d]<\/p>\n<p>-H \uff1ahard limit\uff0c\u4e25\u683c\u7684\u8bbe\u7f6e\uff0c\u5fc5\u5b9a\u4e0d\u80fd\u8d85\u8fc7\u8fd9\u4e2a\u8bbe\u7f6e\u7684\u6570\u503c<\/p>\n<p>-S \uff1asoft limit\uff0c\u8b66\u544a\u7684\u8bbe\u7f6e\uff0c\u53ef\u4ee5\u8d85\u8fc7\u8fd9\u4e2a\u8bbe\u5b9a\u503c\uff0c\u4f46\u662f\u82e5\u8d85\u8fc7\u5219\u6709\u8b66\u544a\u4fe1\u606f\u3002 \u5728\u8bbe\u7f6e\u4e0a\uff0c\u901a\u5e38soft \u4f1a\u6bd4hard \u5c0f\uff0c\u4e3e\u4f8b\u6765\u8bf4\uff0csoft \u53ef\u8bbe\u7f6e\u4e3a80\u800chard \u8bbe\u7f6e\u4e3a100\uff0c\u90a3\u4e48\u4f60\u53ef\u4ee5\u4f7f\u7528\u523090\uff0c\u4f46\u4ecb\u4e8e80~100\u4e4b\u95f4\u65f6\uff0c\u7cfb\u7edf\u4f1a\u6709\u8b66\u544a\u4fe1\u606f\u901a\u77e5\u4f60\u3002<\/p>\n<p>-a \uff1a\u540e\u9762\u4e0d\u63a5\u4efb\u4f55\u53c2\u6570\uff0c\u53ef\u5217\u51fa\u6240\u6709\u7684\u9650\u5236\u989d\u5ea6\uff1b<\/p>\n<p>-c \uff1a\u5f53\u67d0\u4e9b\u8fdb\u7a0b\u53d1\u751f\u9519\u8bef\u65f6\uff0c\u7cfb\u7edf\u53ef\u80fd\u4f1a\u5c06\u8be5\u8fdb\u7a0b\u5728\u5185\u5b58\u4e2d\u7684\u4fe1\u606f\u5199\u6210\u6587\u4ef6\uff08\u6392\u9519\u7528\uff09\uff0c\u8fd9\u79cd\u6587\u4ef6\u5c31\u88ab\u79f0\u4e3a\u5185\u6838\u6587\u4ef6\uff0c\u6b64\u4e3a\u9650\u5236\u6bcf\u4e2a\u6587\u4ef6\u5185\u6838\u6587\u4ef6\u7684\u6700\u5927\u5bb9\u91cf\u3002<\/p>\n<p>-f \uff1a\u6b64shell \u53ef\u4ee5\u521b\u5efa\u7684\u6700\u5927\u6587\u4ef6\u5bb9\u91cf\uff08\u4e00\u822c\u53ef\u80fd\u8bbe\u7f6e\u4e3a2GB\uff09\u5355\u4f4d\u4e3akb<\/p>\n<p>-d \uff1a\u8fdb\u7a0b\u53ef\u4f7f\u7528\u7684\u6700\u5927\u65ad\u88c2\u5185\u5b58\uff08segment \uff09\u5bb9\u91cf<\/p>\n<p>-l \uff1a\u53ef\u7528\u4e8e\u9501\u5b9a\uff08lock\uff09\u7684\u5185\u5b58\u5bb9\u91cf<\/p>\n<p>-t \uff1a\u53ef\u4f7f\u7528\u7684\u6700\u5927cpu \u65f6\u95f4\uff08\u5355\u4f4d\u4e3a\u79d2\uff09<\/p>\n<p>-u \uff1a\u5355\u4e00\u7528\u6237\u53ef\u4ee5\u4f7f\u7528\u7684\u6700\u5927\u8fdb\u7a0b\uff08process\uff09\u6570\u91cf\uff1b<\/p>\n<p>Ulimit \u2013a<\/p>\n<p>Ulimit \u2013f 10240<\/p>\n<p>Ulimit \u2013a<\/p>\n<p>\u4e00\u822c\u7528\u6237\u4f7f\u7528\u8fd9\u4e2a\u547d\u4ee4\u7684\u65f6\u5019\u53ea\u80fd\u51cf\u5c11\u8bbe\u7f6e\u7684\u503c\uff0c\u4e0d\u80fd\u589e\u52a0\u8bbe\u7f6e\u7684\u503c<\/p>\n<p>&nbsp;<\/p>\n<p>\u7248\u6743\u58f0\u660e\uff1a\u672c\u6587\u4e3a\u535a\u4e3b\u539f\u521b\u6587\u7ae0\uff0c\u672a\u7ecf\u535a\u4e3b\u5141\u8bb8\u4e0d\u5f97\u8f6c\u8f7d\u3002<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u53d8\u91cf\u952e\u76d8\u8bfb\u53d6\uff0c\u6570\u7ec4\u4e0e\u58f0\u660e\uff1aread\uff0carray\uff0cdeclare 1. read \u8bfb\u53d6\u6765\u81ea\u952e\u76d8\u8f93\u5165\u7684\u53d8\u91cf\uff0c\u5e38\u88ab\u7528\u5728 shell script \u7684\u64b0\u5199\u5f53\u4e2d\u3002 \u7528\u6cd5\uff1a 2. declare \/ typeset declare \u6216 typeset \u662f\u4e00\u6837\u7684\u529f\u80fd\uff0c\u5c31\u662f\u5728\u58f0\u660e\u53d8\u91cf\u7684\u7c7b\u578b\u3002\u5982\u679c\u4f7f\u7528 declare \u540e\u9762\u5e76\u6ca1\u6709\u63a5\u4efb\u4f55\u53c2\u6570\uff0c\u90a3\u4e48 bash \u5c31\u4f1a\u4e3b\u52a8\u7684\u5c06\u6240\u6709\u7684\u53d8\u91cf\u540d\u79f0\u4e0e\u5185\u5bb9\u901a\u901a\u53eb\u51fa\u6765\uff0c \u5c31\u597d\u50cf\u4f7f\u7528 set \u4e00\u6837\u3002 \u7528\u6cd5\uff1adeclare [-aixr] variable \u53c2\u6570\uff1a -a \uff1a \u5c06\u540e\u9762\u540d\u4e3a variable \u7684\u53d8\u91cf\u5b9a\u4e49\u6210\u4e3a\u6570\u7ec4 (array) \u7c7b\u578b -i \uff1a \u5c06\u540e\u9762\u540d\u4e3a variable \u7684\u53d8\u91cf\u5b9a\u4e49\u6210\u4e3a\u6574\u6570\u6570\u5b57 (integer) \u7c7b\u578b -x \uff1a \u7528\u6cd5\u4e0e export \u4e00\u6837\uff0c \u5c31\u662f\u5c06\u540e\u9762\u7684 variable \u53d8\u6210\u73af\u5883\u53d8\u91cf\uff1b -r \uff1a \u5c06\u53d8\u91cf\u8bbe\u7f6e\u6210\u4e3a readonly \u7c7b\u578b\uff0c \u8be5\u53d8\u91cf\u4e0d\u53ef\u88ab\u66f4\u6539\u5185\u5bb9\uff0c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"_links":{"self":[{"href":"http:\/\/www.wuchangsong.com\/index.php?rest_route=\/wp\/v2\/posts\/128"}],"collection":[{"href":"http:\/\/www.wuchangsong.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.wuchangsong.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.wuchangsong.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.wuchangsong.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=128"}],"version-history":[{"count":4,"href":"http:\/\/www.wuchangsong.com\/index.php?rest_route=\/wp\/v2\/posts\/128\/revisions"}],"predecessor-version":[{"id":136,"href":"http:\/\/www.wuchangsong.com\/index.php?rest_route=\/wp\/v2\/posts\/128\/revisions\/136"}],"wp:attachment":[{"href":"http:\/\/www.wuchangsong.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=128"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.wuchangsong.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=128"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.wuchangsong.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=128"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}