Hadoop获取DFSRemaininghadoop文件系统可使用的剩余容量大小。（可以通过http://<HOST:50070直观的查看）ConfiguredCapacity:   18.22GBDFSUsed:   44KBNonDFSUsed:   15.92GBDFSRemaining:   

编译androidO源码，遇到错误FAILED:out/target/product/hon450/obj/ETC/sepolicy_intermediates/sepolicy/bin/bashc"(out/host/linuxx86/bin/secilcMtrueGc30out/target/prod

使用javamail发送邮件时，老是提示NetworkisNetwork：com.sun.mail.util.MailConnectException: Couldn't connect to host, port: smtp.163.com, 25; timeout 1;  nested exception is:j

报错如下：Unknownhost'services.gradle.org'.YoumayneedtoadjusttheproxysettingsinGradle.LearnaboutconfiguringHTTPproxiesinGradle解决方法：问题

删除记录可以使用“DELETEFROM”语句，从现有表中删除记录:示例删除地址为“Mountain21”的记录:importmysql.connectormydbmysql.connector.connect(host"localhost",user"你

1importpymongopipinstallpymongo安装python操作mongodb的模块2myclientpymongo.MongoClient(host'127.0.0.1',port27017)指定主机和端口号创建客户端34dblistmyclient

首先使用npm安装mysql包：$npminstallmysql连接数据库：varmysql     require('mysql');   //引入mysql包//创建数据库连接varconnectionmysql.createConnection({  host    :'localhos

featuressc.parallelize(data\_group\idx\).map(lambdax:(x.host\_ip'^'x.domain,1)).reduceByKey(operator.add).map(get\_domain\_features)defget\_domain\_features(x):   

importparamikoimportsys创建SSHClient实例对象sshparamiko.SSHClient()调用方法，表示没有存储远程机器的公钥，允许访问ssh.set_missing_host_key_policy(paramiko.AutoAddPolic

背景描述Time:20190124T00:08:14.70572408:00User@Host:@Id:Schema:sentrymetaLast_errno:0Killed:0Query_time:0.315758Lock_