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1. Scanning tables It is a leanear operation which can fetch data block containing row and apply filter or condition. Scanning small table is efficien 阅读全文
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redhat7 ERROR Failed to connect socket to '/var/run/libvirt/libvirt-sock': No such file or directory yum -y install avahi systemctl start libvirtd 阅读全文
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自执行函数 (function(arg){ })("blabla"); 匿名函数 var a = function(arg){ }; a(); for (var i = 0; i < a.length; i++){console.log(a[i]);} for (var item in a){ co 阅读全文
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查看Linux系统发行版名称 检查命令: cat /proc/version # cat /proc/version Linux version 3.10.0-327.el7.x86_64 (mockbuild@x86-034.build.eng.bos.redhat.com) (gcc versi 阅读全文