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javap -c xx.class {i=0i=i++}0: bipush 02: istore_1 stack ->var13: iload_1 var1->stack4: iinc 1, 1 //var1 =var1+17: istore_1 stack ->var1 //var1 被覆盖 值不 阅读全文
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整型: byte 1 short 2 int 4 long 80b1001 1_233_32 1341414141414Ljava 没有无符号类型浮点型:float 4 double 812.2f 无后缀为doubleDouble.isNaN(x) 不能==Double.NaNBigDecimal 阅读全文
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puppet chef ansible salt docker https://github.com/ansible/ansiblehttps://github.com/saltstack/salthttps://github.com/chef/chefhttps://github.com/pupp 阅读全文
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apt-get install libmysqlclient-devpip install mysqlclientsudo apt-get install libxml2-dev libxslt1-dev python-dev pip install pyqueryRuntimeError: Mod 阅读全文
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usermod -aG sudo <username> //username to sudo 中文乱码问题解决: apt-get purge locales apt-get autoclean apt-get install locales cd /usr/share/locales ./insta 阅读全文
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apt-get install pptpd 3、编辑pptpd.conf文件 vi /etc/pptpd.conf 取消注释下面内容 option /etc/ppp/pptpd-options localip 192.168.0.1 remoteip 192.168.0.234-238,192.16 阅读全文
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/usr/libexec/java_home mac下用 阅读全文
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远程test 关键起动server 要有java.rmi.server.hostname jmeter-server.bat -Djava.rmi.server.hostname=192.168.130.91 阅读全文
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pip install pyftpdlib python -m pyftpdlib -p 21 python -m SimpleHTTPServer 80 阅读全文