redis 설치

# download
sudo wget http://download.redis.io/redis-stable.tar.gz
sudo tar xvzf redis-stable.tar.gz

# Appears that gcc >= 4.9 is required to build redis 6x ...
# https://stackoverflow.com/questions/61535050/redis-build-failure
sudo yum install centos-release-scl
sudo yum install devtoolset-7-gcc*
scl enable devtoolset-7 bash

# install
cd redis-stable
make distclean
make
make test

# use
cd src
./redis-cli -v