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1. Command format: cd [Directory name] 2. Command Function Switch the current directory to [directory name] 3. Common examples 1. Enter the system root directory Order: cd / Description: Enter the system root directory. After executing the above command, take a look at the ls command. The current directory has reached the system root direct ...

I. Environmental preparation CDH5.15.0，spark2.3.0，hue3.9.0 Note: Because the CDH cluster is used, the default version of spark is 1.6.0, and saprk2.3.0 is installed through the parcel package. At this time, there are two spark versions in the cluster. Hue integrates spark 1.6. It is necessary to upload the jar package and o ...

The libssl-dev version problem cannot be installed: Depends: libssl 1.0.0 (= 1.0.1t-1 + deb7u2) but 1.0.1t-1 + deb8u6 is to be installed       Problem phenomena: Error prompted when installing libssl-dev: sudo apt-get install libssl-dev Reading package lists... Done Building dependency tree Reading state informatio ...

virtualbox Installation of virtual machine under windows brings infinite convenience for learning ubuntu, and saves computer money at the same time uuuuuuuuuuu ubuntu Ubununtu is installed in the virtual machine. There are many teaching materials on the internet. Note: Storage space can not be the default 10G, it is easy to ...

To enable https access to the website, first of all, an ssl certificate issued by a certification authority is needed. At present, a certification authority is free for individuals. The better thing is: let's encrypt . Let's Encrypt is a public free SSL project initiated by Mozilla, Cisco, Akamai, IdenTrust and EFF. It is free, ea ...

1. Modify the storage time of kafka data in the subject by default of 7 days ------------------------------------------------- [kafka/conf/server.properties] log.retention.hours=1 2. aggregate query using hive ---------------------------------------------------- 1.hive command line query // Query all calle ...

Preface Ao Tao is lucky to have the chance to try to learn K8S with a group recently. Xiaocai is a novice. He only knows that the logo of K8S is like a fishing net and a compass. Docker's logo is a whale carrying a container swimming in the sea. From Logo alone, there must be a great relationship between them. So I decided to ...

This paper derives from:Everyday Learning IT - Knowledge Base Cluster machine Host IP address 192.168.99.181 ambari-mirror 192.168.99.101 ambari-server 192.168.99.106 ambari-agent1 192.168.99.107 ambari-agent2 Create management user hadoop (all node operations) useradd hadoop Modify the machine hosts file (all node operations) ec ...

Preface Because of its versatility, wide employment, free source code and other reasons, Linux has become popular in recent years, ranging from cloud servers to routers. Knowing that various Linux books recommend a wide range of, "ldd3", "Inside Source Code Situation Analysis", "Deep Understanding of the Linux Kernel& ...

The basic environment of the system LAMP has been built. The process of deploying the web project online is recorded as follows, which is convenient for future deployment of new projects. laravel projectubuntu 16.04php 7.0 (1) We use your@email.com account to git projects on the server Add your@email.com member to the project to be deployed in ...