Prerequisites: GCC Compiler Setup

Understanding GCC

GCC (GNU Compiler Collection) is the standard compiler suitee for Linux systems, supporting multiple programming languages including C, C++, Fortran, Java, and Ada. It can target various architectures such as x86, x86-64, PowerPC, SPARC, and ARM.

Before installing Redis, you need the C++ development environment:

yum -y install gcc-c++

Verify the installation:

gcc -v

Selecting a Redis Version

Check your current Redis version:

redis-server -v

Note: Due to security vulnerabilities in older versions, ensure you use version 6.0.8 or higher. This guide uses Redis 7.0.

Installation Steps for Redis 7

Step 1: Download the Package

Place the downloaded archive in the /opt directory:

wget https://download.redis.io/releases/redis-7.0.0.tar.gz

Step 2: Extract the Archive

tar -zxvf redis-7.0.0.tar.gz

Step 3: Build and Install

Navigate to the extracted directory and compile:

cd redis-7.0.0
make && make install

Step 4: Locate Installation Directory

The default binaries are installed in /usr/local/bin. Key executables include:

• redis-server - Server startup command
• redis-cli - Command-line client interface
• redis-benchmark - Performance testing utility
• redis-check-aof - AOF file repair tool
• redis-check-dump - RDB file repair tool

Copy the default configuration to a custom location:

mkdir -p /myredis
cp /opt/redis-7.0.0/redis.conf /myredis/

Step 5: Configure Redis

Edit the configuration file in /myredis/redis.conf with these essential changes:

• Change daemonize no to daemonize yes to run as a background service
• Change protected-mode yes to protected-mode no for external connections
• Comment out or modify bind 127.0.0.1 to allow remote access
• Set a password with requirepass your_secure_password

Restart the service after making changes.

Step 6: Start the Server

redis-server /myredis/redis.conf

Step 7: Connect to Redis

Without password authentication:

redis-cli

With password:

redis-cli -a your_password -p 6379

To suppress security warnings:

redis-cli -a your_password 2>/dev/null

Step 8: Stop the Service

For single instance:

redis-cli -a your_password shutdown

For multiple instances (specify port):

redis-cli -p 6379 shutdown

Step 9: Uninstall Redis

First, stop the running service:

redis-cli -a your_password shutdown

Remove installed binaries:

ls -l /usr/local/bin/redis-*
rm -rf /usr/local/bin/redis-*