centos7 install vnc remote service

To avoid some unexpected system errors, it is better to update yum to the latest. It is not recommended to update the production environment when there is business running yum update Install GNOME Desktop graphics Desktop Services yum groupinstall "GNOME Desktop" Install vnc yum install tigervnc-server View system operation mo ...

Posted on Wed, 13 Nov 2019 10:10:48 -0500 by sargenle

iaas (openstack) super detailed firewall building operation

This blog introduces the basic operation of firewall in openstack All ports are open here to add firewall rules due to non production environment You can use the neutron basic command to view [root@controller html]# neutron --help | grep fire firewall-create Create a firewall. firewall-delete ...

Posted on Mon, 11 Nov 2019 13:27:22 -0500 by rallen102

GreenPlum's events II: GreenPlum starts reporting errors

Labels (space delimited): GreenPlum In the process of configuring GreenPlum, you need to pay attention to the following points: Find the installation package Installation dependency, Gun version needs attention Detailed installation procedure reference Greenplum installation introduction I am a computer virtual machine insta ...

Posted on Sun, 10 Nov 2019 14:42:13 -0500 by antisback

zabbix monitoring mysql survival and performance

The Zabbix environment has been deployed:Zabbix_aget: installed in / etc/zabbix1. Open port 10050 firewall-cmd --zone=public --add-port=10050/tcp --permanent firewall-cmd--reload 2. Close setenforce rsetenforce 0 3.vim /etc/zabbix/zabbix_agentd.d/userparameter_mysql.confWrite: ####Scripts for monitoring mysql performance UserPar ...

Posted on Sun, 10 Nov 2019 09:56:09 -0500 by miracle_potential

Firewall script design

Step by step To implement this case, follow the steps below. Step 1: write a typical Linux gateway firewall script 1) write script file / opt/ipfw-gw.sh [root@gw1 ~]# vim /opt/ipfw-gw.sh #!/bin/bash ## 2015.05.20 TsengYia. #### 1. Define environment variables for easy migration #### INET_IF="eth1" INET_IP="174.16.1 ...

Posted on Thu, 07 Nov 2019 12:28:26 -0500 by cocell

[knowledge accumulation] big data journey LVS KeepAlived

I. preparation 1. Ipvsadm-c (clear ipvs rules) 2. ifconfig eth:1 down (clear VIP of LVS) II. KeepAlived installation yum install keepalived 3. Configure the host 1. Copy configuration file cp keepalived.conf keepalived.bak cat keepalived.conf 2. Edit configuration file VI kept.conf (related commands: dG,:., $ ...

Posted on Sat, 02 Nov 2019 01:25:25 -0400 by unreel

How to view cpu, memory, hard disk and other hardware information under linux

Note: under Linux, you can see the details of each cpu in / proc/cpuinfo. But for a dual core cpu, you will see two CPUs in cpuinfo. It is often mistaken for two single core CPUs. Original address: http://www.hpboys.com/659.html I. linux CPU size [root@idc ~]# cat /proc/cpuinfo |grep "model name" && cat /proc/cpuinfo |grep "physical i ...

Posted on Fri, 01 Nov 2019 22:53:50 -0400 by manmadareddy

java client cannot upload file to hdfs

019-07-01 16:45:24,933 INFO org.apache.hadoop.ipc.Server: IPC Server handler 2 on 8020, call org.apache.hadoop.hdfs.protocol.ClientProtocol.addBlock from 58.211.111.42:63048 Call#3 Retry#0 java.io.IOException: File /a1.txt could only be replicated to 0 nodes instead of minReplication (=1). There are 1 datanode(s) running and 1 node(s) are excl ...

Posted on Fri, 01 Nov 2019 13:23:10 -0400 by rmbarnes82

Docker Swarm cluster configuration practice

Preface: This blog post is based on the Docker Swarm cluster environment and extends the functions of Docker Swarm. Blog Outline:I. docker swarm network managementII. service management and version update of Swarm The environment of this blog is still based on the environment set up in the previous blog. For details, please refer to the blo ...

Posted on Wed, 30 Oct 2019 10:13:27 -0400 by pete_bisby

[mysql, docker] MySQL database realizes master-slave synchronization and separation of read and write under Django

Special topics: Linux application service configuration Installation and configuration of various Linux Software For more information, please click My blog Check, welcome to visit. MySQL master slave synchronization configuration Master slave configuration Master-slave synchronization enables data ...

Posted on Sat, 26 Oct 2019 11:56:59 -0400 by rocket