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Configure master No password login all salve1. Create Hadoop users for all nodes and set the passwordLog in as root account:Useradd Hadooppasswd Hadoop2, set the master node to use the Hadoop account password-free login to the machineLog in as a

One, the type of DNS server①Primary DNS Server (Master)A domain's master server holds the zone configuration file for that domain, and all of the configuration and changes are made on that server, and this essay explains how to configure a domain's

Official website: http://saltstack.com/Domestic: http://www.saltstack.cn/Command format:Salt ' ' 1. View minion001 host use:[[email protected] ~]# salt  ' minion001 '  cmd.run  ' free -m ' minion001:                  total        used       free   

Environment Description, Linux redhat5.4 + Oracle 11.2.0.1Host Name: Zky.zhanHost ip:192.168.214.10Example Sid:zkyProblem presentationIf you change the listening address (host = Zky.zhan) parameter in the Listenter.ora to the Listening Host network

One, memory overflow problemLinux Setup startup script[Email protected] ~]# vi/usr/local/tomcat/bin/catalina.sh#______________________________________________________________________________________________________________ __start225 # Bugzilla 37848

-----The LVS cluster to build Dr Mode-------client----------LVS-----------WEB12.2.2.100 eth0:2.2.2.10 eth0:2.2.2.20Sub-interface eth0:0:2.2.2.2 lo:0:2.2.2.2------------WEB2---------eth0:2.2.2.30lo:0:2.2.2.2I. Configuring the LVS Scheduler1.

Example:1, Ping module all CCE Group host survival rate[[email protected] ~]# ansible cce-m Ping2. Execute commands with command[Email protected] ~]# ansible cce-m command-a ' cat/etc/redhat-release '3. Execute commands using shell module[Email

Building a Web server 1. Use the parent disk link to clone the virtual machine and modify the basic parameters such as Ip: Clone the virtual machine, name the Web server, and modify the Following: IP A # #查看MAC地址 650) this.width=650; "title="

Building a private CAWe use the OpenSSL software to achieveSo first, let's look at the configuration file for the software.Implementing the Environment CentOS 7.2[[email protected] ~]# RPM-QC OpenSSL//can see that the command does not have any

Yesterday was asked the principle of traceroute, a moment unexpectedly also said, some orders usually although often in use, but the actual principle does not understand, take advantage of this opportunity to comb. Traceroute: is a network

The image of Docker and some data are in the/var/lib/docker directory, it occupies the Linux system partition, that is, the following/dev/vda1, when there are multiple mirrors,/dev/vda1 space may be insufficient, We can attach Docker data to a data

Mirroring is a precondition for Docker to run a container.One: Get images: Beginners can download high-quality resources from the Internet, such as the Docker hub of the Ubuntu warehouse download. Command: Docker pull UbuntuTwo: View image

When we ssh to a Linux host, we need to enter the account password. In order to password-free login, we usually use SSH key authentication method. The principle is probably as follows:We want to log in from a host SSH to Host B, usually we generate

Format of the Find command: Find [-path]-options [-print-exec-ok] Path : The directory path to find. ~ Represents the $home directory . Indicates the current directory /represents the root

A virtual machine 1. Mount the virtual machine in NAT Nic mode 2. It is best to use a few virtual machines to modify the hostname, static ip/etc/network/interface, here is S101 s102 s103 three host Ubantu, change/etc/hostname file

Implementation of Nginx Proxy (seven-layer load balancing);Topology diagram:WEB01 WEB02|192.168.1.20 |192.168.1.21-----------------------------|192.168.1.254Nginx (reverse proxy);|1.1.1.254|Client (1.1.1.1);Requirements: client1.1.1.1 can be

One, ganglia basic introductionGanglia it is a distributed monitoring system, where there are two Daemon, each: clientgangliamonitoring Daemon (Gmond) and service-side Gangliameta Daemon (Gmetad), There's also gangliaphp WebFrontend (Web-based

Project background:Lab Environment:VMware Workstation 11Under the centos6.5 systemFunc server: ip:192.168.0.15 firewall off Setenforce 0Func-controlled end: ip:192.168.0.44 firewall off Setenforce 0SECURECRT (SSH remote connection software)Software

Four Docker Use of mirrorsA Docker installation1.1 Viewing the system version[Email protected] ~]# cat/etc/redhat-releaseCentOS Release 6.6 (Final)1.2 using epel yum source[Email protected]~] #rpm-IVH

How to Use ssh-keygen to generate keyssh-keygen-generate, manage, and convert authentication keys are generally used: [B] ssh-keygen-I-f public key name & gt; authorized_keys [/B] Syntax details [code] ssh-keygen [-q] [-bbits]-ttype [-Nnew_pa... how