{"id":1894,"date":"2015-01-31T00:54:12","date_gmt":"2015-01-30T16:54:12","guid":{"rendered":"http:\/\/ixyzero.com\/blog\/?p=1894"},"modified":"2015-01-31T00:54:12","modified_gmt":"2015-01-30T16:54:12","slug":"linux%e4%b8%8b%e7%9a%84%e4%b8%80%e4%ba%9b%e4%bd%bf%e7%94%a8%e7%bb%8f%e9%aa%8c%e5%b0%8f%e7%bb%93","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/1894.html","title":{"rendered":"Linux\u4e0b\u7684\u4e00\u4e9b\u4f7f\u7528\u7ecf\u9a8c\u5c0f\u7ed3"},"content":{"rendered":"<p>\u6700\u8fd1\u8ddfLinux\u4e0b\u7684\u4e00\u4e9b\u811a\u672c\u6d4b\u8bd5\u6253\u4ea4\u9053\u6bd4\u8f83\u591a\uff0c\u8e29\u4e86\u4e0d\u5c11\u5751\uff0c\u4e5f\u603b\u7ed3\u4e86\u4e0d\u5c11\u7ecf\u9a8c\uff0c\u5728\u6b64\u8bb0\u5f55\u4e00\u4e0b\uff0c\u505a\u4e2a\u5907\u5fd8\u3002<\/p>\n<h5>1.\u5982\u4f55\u521b\u5efa\u5927\u91cf\u6d4b\u8bd5\u6570\u636e\uff1f\uff08\u5355\u4e2a\u5927\u6587\u4ef6\uff09<\/h5>\n<p>\u641c\u7d22\u5173\u952e\u5b57\uff1a<a href=\"http:\/\/search.aol.com\/aol\/search?q=linux+how+to+make+big+file+for+test\" target=\"_blank\">http:\/\/search.aol.com\/aol\/search?q=linux+how+to+make+big+file+for+test<\/a><\/p>\n<h6>\u53c2\u8003\u94fe\u63a5\uff1a<\/h6>\n<ul>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/257844\/quickly-create-a-large-file-on-a-linux-system\" target=\"_blank\">http:\/\/stackoverflow.com\/questions\/257844\/quickly-create-a-large-file-on-a-linux-system<\/a><\/li>\n<li><a href=\"http:\/\/superuser.com\/questions\/609020\/how-can-i-create-a-file-with-a-specific-size-from-a-command-line\" target=\"_blank\">http:\/\/superuser.com\/questions\/609020\/how-can-i-create-a-file-with-a-specific-size-from-a-command-line<\/a><\/li>\n<li><a href=\"http:\/\/www.cyberciti.biz\/faq\/howto-create-lage-files-with-dd-command\/\" target=\"_blank\">http:\/\/www.cyberciti.biz\/faq\/howto-create-lage-files-with-dd-command\/<\/a><\/li>\n<\/ul>\n<h6>\u89e3\u51b3\u65b9\u6848\uff1a<\/h6>\n<p>\u63a8\u8350\u4f7f\u7528<a href=\"http:\/\/stackoverflow.com\/questions\/257844\/quickly-create-a-large-file-on-a-linux-system\" target=\"_blank\">fallocate<\/a>\u547d\u4ee4\uff1b\u5176\u6b21\u662fdd\u547d\u4ee4\uff1b\u518d\u6b21\u5c31\u662fseq\u547d\u4ee4\u91cd\u5b9a\u5411\u5230\u6587\u4ef6\u4e86\u3002<\/p>\n<h5>2.\u5982\u4f55\u521b\u5efa\u5927\u91cf\u6d4b\u8bd5\u6570\u636e\uff1f\uff08\u5927\u91cf\u5c0f\u6587\u4ef6\uff09<\/h5>\n<p>\u641c\u7d22\u5173\u952e\u5b57\uff1a<a href=\"http:\/\/search.aol.com\/aol\/search?q=Linux+how+to+make+many+small+files\" target=\"_blank\">http:\/\/search.aol.com\/aol\/search?q=Linux+how+to+make+many+small+files<\/a><\/p>\n<h6>\u53c2\u8003\u94fe\u63a5\uff1a<\/h6>\n<ul>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/4140822\/creating-multiple-files-with-content-from-shell\" target=\"_blank\">http:\/\/stackoverflow.com\/questions\/4140822\/creating-multiple-files-with-content-from-shell<\/a><\/li>\n<li><a href=\"http:\/\/unix.stackexchange.com\/questions\/120336\/efficient-way-to-create-multiple-files\" target=\"_blank\">http:\/\/unix.stackexchange.com\/questions\/120336\/efficient-way-to-create-multiple-files<\/a><\/li>\n<li><a href=\"http:\/\/heatware.net\/linux-unix\/create-large-many-number-files-thousands-millions\/\" target=\"_blank\">http:\/\/heatware.net\/linux-unix\/create-large-many-number-files-thousands-millions\/<\/a><\/li>\n<\/ul>\n<h6>\u89e3\u51b3\u65b9\u6848\uff1a<\/h6>\n<p>One command to create 26 empty files:<\/p>\n<pre class=\"lang:default decode:true\">$ touch {a..z}.txt<\/pre>\n<p>or 152:<\/p>\n<pre class=\"lang:default decode:true\">$ touch {{a..z},{A..Z},{0..99}}.txt<\/pre>\n<p>A small loop to create 152 files with some contents:<\/p>\n<pre class=\"lang:default decode:true\">for f in {a..z} {A..Z} {0..99}\ndo\n    echo hello &gt; \"$f.txt\"\ndone<\/pre>\n<p>You can do numbered files with leading zeros:<\/p>\n<pre class=\"lang:default decode:true\">for i in {0..100}\ndo\n    echo hello &gt; \"File$(printf \"%03d\" \"$i\").txt\"\ndone<\/pre>\n<p>or, in Bash 4:<\/p>\n<pre class=\"lang:default decode:true\">for i in {000..100}\ndo\n    echo hello &gt; \"File${i}.txt\"\ndone<\/pre>\n<h5>3.\u4e00\u6b21\u521b\u5efa\u591a\u4e2a\u76ee\u5f55<\/h5>\n<p>\u641c\u7d22\u5173\u952e\u5b57\uff1a<a href=\"http:\/\/search.aol.com\/aol\/search?q=linux+create+multiple+directory+at+once\" target=\"_blank\">http:\/\/search.aol.com\/aol\/search?q=linux+create+multiple+directory+at+once<\/a><\/p>\n<h6>\u53c2\u8003\u94fe\u63a5\uff1a<\/h6>\n<ul>\n<li><a href=\"http:\/\/unix.stackexchange.com\/questions\/636\/how-do-i-make-multiple-directories-at-once-in-a-directory\" target=\"_blank\">http:\/\/unix.stackexchange.com\/questions\/636\/how-do-i-make-multiple-directories-at-once-in-a-directory<\/a><\/li>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/4854277\/how-do-i-make-multiple-folders-in-a-single-location-using-relative-path-to-the-l\" target=\"_blank\">http:\/\/stackoverflow.com\/questions\/4854277\/how-do-i-make-multiple-folders-in-a-single-location-using-relative-path-to-the-l<\/a><\/li>\n<\/ul>\n<h6>\u89e3\u51b3\u65b9\u6848\uff1a<\/h6>\n<pre class=\"lang:default decode:true\">$ mkdir monitor_log big_message error_log exec_log  #\u4e00\u884c\u6307\u5b9a\u591a\u4e2a\u5373\u53ef<\/pre>\n<h5>4.\u4e00\u884c\u521b\u5efa\u591a\u4e2a\u5d4c\u5957\u5b50\u76ee\u5f55<\/h5>\n<p>In Bash and other shells that support it, you can do:<\/p>\n<pre class=\"lang:default decode:true\">$ mkdir ~\/Labs\/lab4a\/folder{1..3}<\/pre>\n<p>or<\/p>\n<pre class=\"lang:default decode:true\">$ mkdir ~\/Labs\/lab4a\/folder{1,2,3}<\/pre>\n<p>Use shell expansion:<\/p>\n<pre class=\"lang:default decode:true  \">$ mkdir Labs\/lab4a\/{folder1,myfolder,foofolder}<\/pre>\n<h5>5.Bash\u811a\u672c\u9519\u8bef\u201cunary operator expected\u201d<\/h5>\n<p>\u641c\u7d22\u5173\u952e\u5b57\uff1a<a href=\"http:\/\/search.aol.com\/aol\/search?q=unary+operator+expected\" target=\"_blank\">http:\/\/search.aol.com\/aol\/search?q=unary+operator+expected<\/a><\/p>\n<h6>\u53c2\u8003\u94fe\u63a5\uff1a<\/h6>\n<ul>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/408975\/compare-integer-in-bash-unary-operator-expected\" target=\"_blank\">http:\/\/stackoverflow.com\/questions\/408975\/compare-integer-in-bash-unary-operator-expected<\/a><\/li>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/13617843\/unary-operator-expected\" target=\"_blank\">http:\/\/stackoverflow.com\/questions\/13617843\/unary-operator-expected<\/a><\/li>\n<\/ul>\n<h6>\u89e3\u51b3\u65b9\u6848\uff1a<\/h6>\n<blockquote><p>It doesn&#8217;t give me that error. Nonetheless, if you&#8217;re using bash it&#8217;s better to use the builtin [[ than the test ([) command.<\/p><\/blockquote>\n<pre class=\"lang:default decode:true\">if [[ $i -ge 2 ]]<\/pre>\n<p>\u5373\uff0c\u63a8\u8350\u4f7f\u7528\u201c[[\u201d\u800c\u4e0d\u662f\u201c[\u201d\uff0c\u56e0\u4e3a\u4e0d\u77e5\u9053\u4ec0\u4e48\u65f6\u5019\u9519\u8bef\u5c31\u51fa\u73b0\u4e86\u3002<\/p>\n<h5>6.Linux\u7684ps\u547d\u4ee4aux\u9009\u9879\u8bf4\u660e<\/h5>\n<h6>\u641c\u7d22\/\u53c2\u8003\u94fe\u63a5\uff1a<\/h6>\n<ul>\n<li><a href=\"http:\/\/search.aol.com\/aol\/search?q=linux+ps+aux+format\" target=\"_blank\">http:\/\/search.aol.com\/aol\/search?q=linux+ps+aux+format<\/a><\/li>\n<li><a href=\"http:\/\/www.binarytides.com\/linux-ps-command\/\" target=\"_blank\">http:\/\/www.binarytides.com\/linux-ps-command\/<\/a><\/li>\n<li><a href=\"http:\/\/superuser.com\/questions\/117913\/ps-aux-output-meaning\" target=\"_blank\">http:\/\/superuser.com\/questions\/117913\/ps-aux-output-meaning<\/a><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h5>7.Linux\u4e0b\u67e5\u770b\u76ee\u5f55\u7684\u5927\u5c0f<\/h5>\n<h6>\u641c\u7d22\/\u53c2\u8003\u94fe\u63a5\uff1a<\/h6>\n<ul>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/6644722\/check-total-file-size-of-a-specific-directory-for-a-specific-user\" target=\"_blank\">http:\/\/stackoverflow.com\/questions\/6644722\/check-total-file-size-of-a-specific-directory-for-a-specific-user<\/a><\/li>\n<li><a href=\"http:\/\/www.cyberciti.biz\/faq\/checking-directory-size-in-linux-command\/\" target=\"_blank\">http:\/\/www.cyberciti.biz\/faq\/checking-directory-size-in-linux-command\/<\/a><\/li>\n<li><a href=\"http:\/\/www.cyberciti.biz\/faq\/how-do-i-find-the-largest-filesdirectories-on-a-linuxunixbsd-filesystem\/\" target=\"_blank\">http:\/\/www.cyberciti.biz\/faq\/how-do-i-find-the-largest-filesdirectories-on-a-linuxunixbsd-filesystem\/<\/a><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h5>8.Bash\u4e2d\u53d8\u91cf\u7684\u8fde\u63a5<\/h5>\n<h6>\u641c\u7d22\/\u53c2\u8003\u94fe\u63a5\uff1a<\/h6>\n<ul>\n<li><a href=\"http:\/\/search.aol.com\/aol\/search?q=bash+concatenate+variable\" target=\"_blank\">http:\/\/search.aol.com\/aol\/search?q=bash+concatenate+variable<\/a><\/li>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/4181703\/how-can-i-concatenate-string-variables-in-bash\" target=\"_blank\">http:\/\/stackoverflow.com\/questions\/4181703\/how-can-i-concatenate-string-variables-in-bash<\/a><\/li>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/14325722\/bash-variables-concatenation\" target=\"_blank\">http:\/\/stackoverflow.com\/questions\/14325722\/bash-variables-concatenation<\/a><\/li>\n<\/ul>\n<p>\u4f7f\u7528\u2019{}\u2019\u6765\u8fde\u63a5\u666e\u901a\u5b57\u7b26\u4e32\u548c\u53d8\u91cf\u3002<\/p>\n<p>&nbsp;<\/p>\n<h5>9.Linux\u4e0b\u67e5\u770b\u5927\u6587\u4ef6\u7684\u51e0\u4e2a\u5c0f\u6280\u5de7<\/h5>\n<ul>\n<li><a href=\"http:\/\/www.thegeekstuff.com\/2009\/08\/10-awesome-examples-for-viewing-huge-log-files-in-unix\/\" target=\"_blank\">http:\/\/www.thegeekstuff.com\/2009\/08\/10-awesome-examples-for-viewing-huge-log-files-in-unix\/<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u6700\u8fd1\u8ddfLinux\u4e0b\u7684\u4e00\u4e9b\u811a\u672c\u6d4b\u8bd5\u6253\u4ea4\u9053\u6bd4\u8f83\u591a\uff0c\u8e29\u4e86\u4e0d\u5c11\u5751\uff0c\u4e5f\u603b\u7ed3\u4e86\u4e0d\u5c11\u7ecf\u9a8c\uff0c\u5728\u6b64\u8bb0\u5f55\u4e00\u4e0b\uff0c\u505a\u4e2a\u5907\u5fd8\u3002 1.\u5982\u4f55 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,11,7,12],"tags":[462,19],"class_list":["post-1894","post","type-post","status-publish","format-standard","hentry","category-knowledgebase-2","category-linux","category-programing","category-tools","tag-fallocate","tag-tips"],"views":1965,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/1894","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=1894"}],"version-history":[{"count":0,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/1894\/revisions"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=1894"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=1894"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=1894"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}