{"id":573,"date":"2014-07-13T15:53:59","date_gmt":"2014-07-13T15:53:59","guid":{"rendered":"http:\/\/ixyzero.com\/blog\/?p=573"},"modified":"2014-07-13T15:53:59","modified_gmt":"2014-07-13T15:53:59","slug":"linux%e4%b8%8b%e7%9a%84shell%e8%84%9a%e6%9c%ac%e7%bc%96%e5%86%99%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a1%b9","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/573.html","title":{"rendered":"Linux\u4e0b\u7684shell\u811a\u672c\u7f16\u5199\u6ce8\u610f\u4e8b\u9879"},"content":{"rendered":"

\u5728\u5199shell\u811a\u672c\u7684\u65f6\u5019\uff0c\u867d\u7136\u8bf4\u5b83\u7684\u8bed\u6cd5\u7b80\u5355\uff0c\u4f46\u8fd8\u662f\u6709\u4e9b\u70b9\u9700\u8981\u5341\u5206\u6ce8\u610f\uff0c\u5426\u5219\u7ecf\u5e38\u4f1a\u8ba9\u4f60\u6311\u4e0d\u51fa\u6bdb\u75c5\u4f46\u53c8\u65e0\u6cd5\u6b63\u786e\u8fd0\u884c\uff0c\u6bd4\u5982\uff1a\u7a7a\u683c\uff0c\u7ed9\u53d8\u91cf\u8d4b\u503c\u4e0d\u80fd\u6709\u7a7a\u683c\uff0c\u50cfa=1\u5c31\u4e0d\u80fd\u5199\u6210a = 1\uff0c\u521a\u5f00\u59cb\u5199\u7684\u65f6\u5019\u4f1a\u5f88\u7ea0\u7ed3\u2026\u2026<\/p>\n

\u5199\u5224\u65ad\u8bed\u53e5\u7684\u65f6\u5019[]\u4e4b\u95f4\u4e00\u5b9a\u8981\u6709\u7a7a\u683c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u5224\u65ad\uff1a<\/p>\n

\u53c2\u8003\uff1ahttp:\/\/www.cnblogs.com\/emanlee\/p\/3583769.html<\/a><\/p>\n

#\u5982\u679c\u6587\u4ef6\u5939\u4e0d\u5b58\u5728\uff0c\u521b\u5efa\u6587\u4ef6\u5939
\nif [ ! -d “\/myfolder” ]; then
\nmkdir \/myfolder
\nfi<\/p>\n

#shell\u5224\u65ad\u6587\u4ef6,\u76ee\u5f55\u662f\u5426\u5b58\u5728\u6216\u8005\u5177\u6709\u6743\u9650
\nfolder=”\/var\/www\/”
\nfile=”\/var\/www\/log”
\n# -x \u53c2\u6570\u5224\u65ad $folder \u662f\u5426\u5b58\u5728\u5e76\u4e14\u662f\u5426\u5177\u6709\u53ef\u6267\u884c\u6743\u9650
\nif [ ! -x “$folder”]; then
\nmkdir “$folder”
\nfi<\/p>\n

# -d \u53c2\u6570\u5224\u65ad\u76ee\u5f55 $folder \u662f\u5426\u5b58\u5728
\nif [ ! -d “$folder”]; then
\nmkdir “$folder”
\nfi<\/p>\n

# -f \u53c2\u6570\u5224\u65ad $file \u662f\u5426\u5b58\u5728
\nif [ ! -f “$file” ]; then
\ntouch “$file”
\nfi<\/p>\n

# -n \u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u6709\u503c
\nif [ ! -n “$var” ]; then
\necho “$var is empty”
\nexit 0
\nfi<\/p>\n

# \u5224\u65ad\u4e24\u4e2a\u53d8\u91cf\u662f\u5426\u76f8\u7b49
\nif [ “$var1” = “$var2” ]; then
\necho ‘$var1 eq $var2’
\nelse
\necho ‘$var1 not eq $var2’
\nfi<\/p>\n","protected":false},"excerpt":{"rendered":"

\u5728\u5199shell\u811a\u672c\u7684\u65f6\u5019\uff0c\u867d\u7136\u8bf4\u5b83\u7684\u8bed\u6cd5\u7b80\u5355\uff0c\u4f46\u8fd8\u662f\u6709\u4e9b\u70b9\u9700\u8981\u5341\u5206\u6ce8\u610f\uff0c\u5426\u5219\u7ecf\u5e38\u4f1a\u8ba9\u4f60\u6311\u4e0d\u51fa\u6bdb\u75c5\u4f46\u53c8\u65e0\u6cd5\u6b63\u786e\u8fd0 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[65],"class_list":["post-573","post","type-post","status-publish","format-standard","hentry","category-linux","tag-shell"],"views":2201,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/573","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=573"}],"version-history":[{"count":0,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/573\/revisions"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=573"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=573"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}