CENTER OS7 turn off firewall

CentOS 7.0 uses firewall as the firewall by default, and the previous version used iptables. Therefore, you cannot view the firewall status by executing the following command in CentOS 7. [root@localhost ~]# service iptables status Redirecting to /bin/systemctl status iptables.service Unit iptables.service could not be found. ...

Posted on Sat, 04 Apr 2020 09:40:53 -0700 by uNF

Preliminary configuration for installing RabbitMQ and RabbitMQ

RabbitMQ Basic Meaning RabbitMQ is a message middleware that handles asynchronous messages from clients.The message that the server will send is put into the queue pool.Receiver can receive messages from server according to the forwarding mechanism configured by RabbitMQ.RabbitMQ forwards, buffers, and persists messages according to the specifi ...

Posted on Fri, 03 Apr 2020 16:26:39 -0700 by anwoke8204

Firewall policy of Mysql remote access in Centos7

Firewall policy - port access Setup steps Detection port If you cannot connect to Mysql remotely, check whether the default 3306 port allows access: [root@localhost /]# iptables -L -n|grep 3306 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:3306 allow access to If not, you ne ...

Posted on Fri, 03 Apr 2020 03:22:47 -0700 by jennyp

Mysql tutorial - binary distribution installation

Environmental Science Server: alicloud server Operating system: CentOS 6.8 mysql version: 5.5 Memory: 2G download Address: https://dev.mysql.com/downloads/mysql/5.5.html deploy Download and unzip mysql 1> cd /usr/local/ 2> mkdir mysql5.5 3> rz [Select localmysql-5.5.59-linux-glibc2.12-x86_64.tar.gz] ...

Posted on Wed, 01 Apr 2020 19:09:54 -0700 by behzad

Active Information Collection

Introduction to active information collection Interacting directly with the target system will not avoid leaving traces of access, using a controlled third-party computer to detect, using a proxy or a controlled machine to scan, sending different probes, and determining the target status based on the returned results Scan based on TCP/IP model ...

Posted on Tue, 10 Mar 2020 09:56:58 -0700 by babyrocky1

Chrony - NTP time synchronization

Catalog Tips chrony overview chrony's program configuration Basic operation command Tips Packages of yum install ntpdate are no longer supported by Linux Centos8 chrony overview chrony is a free and open-source time synchronization software on CentOS 7. X. it can keep the system clock and th ...

Posted on Thu, 05 Mar 2020 00:40:46 -0800 by FrancoPaddy

linux Getting Started Series 15--vsftp Service for File Transfer

The previous series of articles essentially covered the basics of linux management, starting with this one about deploying and configuring service programs in centos7 to provide a variety of services to the outside world. In our daily work and entertainment, all kinds of resources we need are inseparable from the network and various services. W ...

Posted on Thu, 27 Feb 2020 19:04:41 -0800 by oughost

Design pattern Overview - structural pattern

Last article "Design pattern Overview - creation pattern" After sorting out the five types of creation mode, let's go on to sort out the structural mode. The purpose of a structural pattern is to describe how classes or objects can be combined to form a larger structure. The class structur ...

Posted on Tue, 25 Feb 2020 05:05:05 -0800 by kashmirekat

Mail service configuration (virtual domain & virtual user)

Mail service configuration (virtual domain & virtual user) First of all: https://www.somata.work/2019/VirtualMailServerConfig_MariaDB.html Now what I'm doing is:Linux + httpd + php + mariadb + postfix + dovecot + phpMyAdmin + postfixadmin + roundcubemail Here I will show you how to make a mail service based on virtual domain and virtual us ...

Posted on Sat, 22 Feb 2020 09:56:35 -0800 by JoeF

GlusterFS quick install

Preparation before installation At least three machines are needed here. All machines turn off the firewall and Selinux. All machines need two hard disks, systemctl stop firewalld systemctl disable firewalld setenforce 0 sed -i "s#SELINUX=enforcing#SELINUX=disabled#g" /etc/selinux/config In fact, ...

Posted on Wed, 19 Feb 2020 01:29:45 -0800 by ojeffery