CentOS 7

CentOS Configuration

Basic Info Checks

• Check CentOS Version

cat /etc/redhat-release

Set up Networks

• Open network service

vi /etc/sysconfig/network-scripts/ifcfg-xx

Config as below

Then restart the network service

service network restart

• Install net-tools

yum install net-tools

Install pre-requisite packages

yum install -y gcc gcc-devel gcc-c++ gcc-c++-devel make kernel kernel-devel bzip2

Install Python

yum install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel  mysql-devel gcc gcc-devel python-devel

• In CentOS Python 3.7 above will report No module named ‘ctypes’

yum install libffi-devel

Download

yum install wget
wget https://www.python.org/ftp/python/3.8.2/Python-3.8.2.tgz

Unzip

tar -zxvf Python-3.8.2.tgz

Config Python 3.8

mkdir ~/app/python3
cd Python-3.8.2.tgz
./configure --prefix=/root/app/python3

make && make install

Add to .bash_profile

vi .bash_profile

in .bash_profile add below

# Python
export PYTHON_HOME=/root/app/python3
export PATH=$PYTHON_HOME/bin:$PATH

exit, the reload

source .bash_profile

Install MySQL

• Uninstall mariadb

yum remove mariadb-libs.x86_64

• download and install mysql repo

wget https://repo.mysql.com/mysql57-community-release-el7-8.noarch.rpm
yum localinstall mysql57-community-release-el7-8.noarch.rpm

• Install mysql

yum install mysql-community-server

• Check if mysql is started

ps -ef | grep mysql

if mysql is not started run

service mysqld start

• mysql default pw

cat /var/log/mysqld.log | grep "password"

• login mysql

mysql -uroot -p

• Change root password

SET PASSWORD = PASSWORD("abc123");

set global validate_password_policy=0;
set global validate_password_length=1;

• Set remote access

close firewall

service firewalld stop

allow remote access

update mysql.`user` set Host='%' where User='root' and Host='localhost';
flush privileges;