CentOS

One, time zone Show Time zone Date--help Get help Date-r Date +%z The above two commands are available [Root@localhost ~]# date-r; Date +%z Fri, Oct 23:34:27 +0800 +0800 The main one is the back +0800, East area eight. Modify Time

1. Install JDK First Because Hadoop needs to run in the Java environment, you need to install the JDK before you install it. JDK Installation steps: 1 if CentOS has a low version of the JDK, please uninstall it first. 2 in the official website http:/

Today nothing to play with CentOS, long heard that this system is good, today a good use, incredibly it has a special configuration development environment command. You can use Yum Groupinstall "Development Libraries" "Development Tools" to complete

Set up the global agent as follows: Modify the/etc/profile file and add the following: http_proxy=http://username:password@yourproxy:8080/ ftp_proxy=http://username:password@yourproxy:8080/ Export Http_proxy Export Ftp_proxy If there is no

CentOS View port occupancy commands, such as viewing 80 port occupancy Use the following command: Lsof-i tcp:80List all ports Netstat-ntlp1, open the Port method one: /sbin/iptables-i input-p TCP--dport 80-j ACCEPT Write

Today when you are in a fully distributed cluster of Hadoop, when you start CentOS, you always stop at starting sendmail for a long time, and the next starting sm-client is unusually slow. Later, we found that the original is related to the change

The installation steps are as follows: 1. Perform installation enhancements: The error "Building the main Guest addtional module [Failed]" appears, and the following illustration shows that the installation failed ... To view the installation log

First refer to: "hadoop-2.3.0-cdh5.1.0 pseudo-distributed installation (based on CentOS)" http://blog.csdn.net/jameshadoop/article/details/39055493 Note: This example uses the root user to build First, the environment Operating system: CentOS 6.5 6

1. Environment2. Install the Oracle client (i downloaded the rpm format)Address Oracle Client3. InstallationUpload to Server(1), Yum install-y Libaio(2), RPM-IVH oracle-instantclient12.2-basic-12.2.0.1.0-1.x86_64.rpm(3), install Python client

The size of the VM under Linux is made up of RM (Real memory) and swap, and the size of the RM is the size of the physical RAM, and the size of the swap is up to you. Swap is a virtual memory space through the hard disk, so it is much slower to read

Tomcat is a core project in the Jakarta Project of the Apache Software Foundation (Apache Software Foundation), developed jointly by Apache,sun and other companies and individuals. With Sun's involvement and support, the latest servlet and JSP

Machine Networking:If the server can be networked: Perform ntpdate 1.cn.pool.ntp.org the server will automatically synchronize time write a scheduled task to perform a time synchronization every two minutes;Crontab-e/2 */usr/sbin/ntpdate

This article focuses on performance performance monitoring on Linux (CentOS). 1. Monitor CPU Usage--uptime The command will print out how long the current time system has been running. Average system load of logged on users The load

Zabbix Service-side installationInstallation Complete mysql-5.6, php5.6mysql-5.6 Installation: https://www.cnblogs.com/xzlive/p/9771642.htmlCreate Zabbix User# groupadd zabbix# useradd-g Zabbix Zabbix1.1 Download and install ZabbixAll versions: http:

1. Requirements DescriptionBuild the SVN server environment in the CentOS system2. Construction process2.1 Yum Install SVN[Email protected]/]#Yum Install svn2.2 New directory Store SVN directory[Email protected]/]# mkdir/usr/svn2.3 New Test

1. Check the JDK in the current operating system:Rpm-Qa | grep Java(OrRpm-Qa | grep JDK) (OrRpm-Qa | grep gcj) 2. Delete the built-in JDK:Yum-y removeJava -* 3. Download JDK:Http://www.oracle.com/technetwork/java/javase/downloads/index.html 4.

  Download thrift DependenciesYum-y install automake libtool flex bison pkgconfig gcc-C ++ boost-devel libevent-devel zlib-devel Python-devel ruby-devel crypto-utilsOpenSSL-devel Download the latest thrift, URL: http://thrift.apache.org Tar-zxvf

    1. Open the image file CentOS-5.3-i386-bin-DVD.iso (My centos image file is placed on disk D), find the isolinux directory, right-click to select "extract to the specified folder", select disk D, OK. Go to the D:/solinux directory and retain

When centos 6.3 is installed today, the wireless network card cannot be identified .. Centos does not support wireless NICs of bcm4311, bcm4312, bcm4313, bcm4321, bcm4322, bcm43224, bcm43225, bcm43227, and bcm43228 chips. The solution is as follows.

CentOS-6.3 real machine installation tutorial, centos-6.3 real machine tutorial Installation tutorial for CentOS-6.3 Step 1: Prepare 1. Download CentOS-6.3-i386-bin-DVD1.iso 2. Download and install UltraISO 3. Prepare a 4G or above USB flash