1.下載 mysql-8.0.28-linux-glibc2.12-x86_64.tar.xz 安裝包
創(chuàng)建目錄 mkdir /app 
tar xf  mysql-8.0.28-linux-glibc2.12-x86_64.tar.xz   -C /app
mv  mysql-8.0.28-linux-glibc2.12-x86_64.tar.xz  mysql
切換到/app/mysql目錄
創(chuàng)建run mysqldata  etc tmp  &&  cd mysqldata
mkdir logs data

2.編輯my.cnf文件
cd /app/mysql/etc
vim my.cnf
[mysql]
prompt = [\u@\p][\d]>\_
default-character-set=utf8mb4
[client]
port       = 3306
socket     = /app/mysql/run/mysql.sock
#prompt= "\u@\h :\d \R:\m:\s >"
[mysqld]
port       = 3306
server-id  = 1
socket     = /app/mysql/run/mysql.sock
basedir    = /app/mysql
datadir    = /app/mysql/mysqldata/data
log-bin    = /app/mysql/mysqldata/data/mysql-bin
innodb_data_home_dir      =/app/mysql/mysqldata/data
innodb_log_group_home_dir =/app/mysql/mysqldata/data
log-error =/app/mysql/mysqldata/logs/error.log
pid-file  =/app/mysql/mysqldata/data/mysql.pid
character-set-server=utf8mb4
lower_case_table_names=1
autocommit =1
skip-external-locking
key_buffer_size = 256M
max_allowed_packet = 1M
table_open_cache = 1024
sort_buffer_size = 4M
net_buffer_length = 8K
read_buffer_size = 4M
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 64M
thread_cache_size = 128
tmp_table_size = 128M
explicit_defaults_for_timestamp = true
max_connections = 500
max_connect_errors = 100
open_files_limit = 65535
binlog_format=mixed
binlog_expire_logs_seconds =864000
default_storage_engine = InnoDB
innodb_data_file_path = ibdata1:10M:autoextend
innodb_buffer_pool_size = 1024M
innodb_log_file_size = 256M
innodb_log_buffer_size = 8M
innodb_flush_log_at_trx_commit = 1
innodb_lock_wait_timeout = 50
transaction-isolation=READ-COMMITTED
[mysqldump]
quick
max_allowed_packet = 16M
[myisamchk]
key_buffer_size = 256M
sort_buffer_size = 4M
read_buffer = 2M
write_buffer = 2M
[mysqlhotcopy]
interactive-timeout

3.新建用戶groupadd mysql  && useradd mysql -g mysql
echo "123456"|passwd --stdin mysql

修改目錄權(quán)限 chown mysql:mysql /app/mysql -R

4.初始化數(shù)據(jù)目錄
/app/mysql/bin/mysqld --defaults-file=/app/mysql/conf/my.cnf  --basedir=/app/mysql  --datadir=/app/mysql/mysqldata/data --user=mysql  --lower_case_table_names=1  --initialize 

5.修改啟動文件
cp  /app/mysql/support-files/mysql.server   /etc/init.d/mysql
basedir=/app/mysql
datadir=/app/mysql/mysqldata/data
修改266行 
$bindir/mysqld_safe --defaults-file=/app/mysql/conf/my.cnf --datadir="$datadir" --pid-file="$mysqld_pid_file_path" $other_args >/dev/null &
加上 --defaults-file=/app/mysql/conf/my.cnf 

6.啟動mysql
/etc/init.d/mysql start
創(chuàng)建軟連接  ln -s /app/mysql/etc/my.cnf  /etc/my.cnf

7.修改密碼
通過/app/mysql/mysqldata/logs
cat error.log 日志文件中密碼登錄
set password ='123456';

8.配置環(huán)境變量  
vi /home/mysql/.bash_profile
export PATH=$PATH:/app/mysqlbin

source /home/mysql/.bash_profile