下載mysql，https://dev.mysql.com/downloads/mysql/5.6.html#downloads , 選擇Linux - Generic , 下載64位的tar.gz文件
1、新建mysql用戶和組
# groupadd mysql
# useradd -g mysql -G hadoop -d /usr/local/mysql mysql
# groups mysql ? ? #驗證
# id mysql ? ? ? ?#驗證
2、解壓并安裝mysql ，?mysql-5.6.40-linux-glibc2.12-x86_64.tar.gz放在/opt/software目錄下的（這個位置隨意）
# cd?/opt/software
# tar -zxvf?mysql-5.6.40-linux-glibc2.12-x86_64.tar.gz
# mv?mysql-5.6.40-linux-glibc2.12-x86_64 /usr/local/mysql
# cd /usr/local/mysql
# chown -R mysql:mysql ./
# su - mysql
$ scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data ? ?#安裝mysql，會自動生成my.cnf和，mysql.server文件
$ exit
3、修改配置文件
# mv my.cnf /etc/my.cnf
# vi /etc/my.cnf
#?cp support-files/mysql.server /etc/rc.d/init.d/mysql
#?chmod +x /etc/rc.d/init.d/mysql
# chkconfig --del mysql //刪除原有的mysql服務
# chkconfig --add mysql?? //添加mysql服務
# chkconfig --level 345 mysql on //設置開機自啟動 ,可以使用service啟動mysql
# vi /etc/profile ? ?#增加mysql環(huán)境變量
export ? ?PATH=/usr/local/mysql/bin:$PATH
my.cnf
[client]
port? ? ? ? ? ? = 3306
socket? ? ? ? ? = /usr/local/mysql/data/mysql.sock
[mysqld]
port? ? ? ? ? ? = 3306
socket? ? ? ? ? = /usr/local/mysql/data/mysql.sock
skip-external-locking
key_buffer_size = 256M
sort_buffer_size = 2M
read_buffer_size = 2M
read_rnd_buffer_size = 4M
query_cache_size= 32M
max_allowed_packet = 16M
myisam_sort_buffer_size=128M
tmp_table_size=32M
table_open_cache = 512
thread_cache_size = 8
wait_timeout = 86400
interactive_timeout = 86400
max_connections = 600
# Try number of CPU's*2 for thread_concurrency
thread_concurrency = 32
#isolation level and default engine
default-storage-engine = INNODB
transaction-isolation = READ-COMMITTED
server-id? = 1
basedir? ? = /usr/local/mysql
datadir? ? = /usr/local/mysql/data
pid-file=/usr/local/mysql/data/hostname.pid
#open performance schema
log-warnings
sysdate-is-now
binlog_format = MIXED
log_bin_trust_function_creators=1
log-error? = /usr/local/mysql/data/hostname.err
log-bin=/usr/local/mysql/arch/mysql-bin
#other logs
#general_log =1
#general_log_file? = /usr/local/mysql/data/general_log.err
#slow_query_log=1
#slow_query_log_file=/usr/local/mysql/data/slow_log.err
#for replication slave
#log-slave-updates
#sync_binlog = 1
#for innodb options
innodb_data_home_dir = /usr/local/mysql/data/
innodb_data_file_path = ibdata1:500M:autoextend
innodb_log_group_home_dir = /usr/local/mysql/arch
innodb_log_files_in_group = 2
innodb_log_file_size = 200M
innodb_buffer_pool_size = 2048M
innodb_additional_mem_pool_size = 50M
innodb_log_buffer_size = 16M
innodb_lock_wait_timeout = 100
#innodb_thread_concurrency = 0
innodb_flush_log_at_trx_commit = 1
innodb_locks_unsafe_for_binlog=1
#innodb io features: add for mysql5.5.8
performance_schema
innodb_read_io_threads=4
innodb-write-io-threads=4
innodb-io-capacity=200
#purge threads change default(0) to 1 for purge
innodb_purge_threads=1
innodb_use_native_aio=on
#case-sensitive file names and separate tablespace
innodb_file_per_table = 1
lower_case_table_names=1
[mysqldump]
quick
max_allowed_packet = 16M
[mysql]
no-auto-rehash
[mysqlhotcopy]
interactive-timeout
[myisamchk]
key_buffer_size = 256M
sort_buffer_size = 256M
read_buffer = 2M
write_buffer = 2M
4、啟動mysql
# ps -ef|grep mysql?
# kill -9 $(pgrep mysql) ? ?#若存在mysql進程，則全部kill
#?ps aux|grep mysql kill -9 ? #或者這樣kill
# su - mysql
$ service mysql start ? ? ? ?#啟動方法一
$ ./support-files/mysql.server start ? ?#啟動方法二
$?bin/mysqld_safe & ? ?#啟動方法三，一定要加&,否則啟動完后不會退出命令
5、新建用戶及授權
# su - mysql
$ mysql
$ > show databases;
$ > use mysql; ? ?#使用mysql數(shù)據(jù)庫
$ >?select host,password,user from mysql.user; ? ? ? ?#圖一
> update mysql.user set password=password('123456') where user='root'; ? ?#更改密碼
> create database testone; ? ?#創(chuàng)建數(shù)據(jù)庫testone
> delete from mysql.user where user='' ? ?#否則新建的localhost用戶無法登陸
> grant all privileges on testone.* to hadoop@'%' identified by '123456';
> flush privileges;
> quit
$ service mysql restart
$ mysql -uhadoop -p123456 ? ?#可使用
6、查看mysql連接進程
$ mysql -uroot -p123456
mysql> show processlist;
mysql> ?kill 2;
