groupadd mysql # add to mysql Group
useradd -g mysql mysql -s /bin/false # Create user mysql To join the mysql Group , Don't allow mysql Users log in to the system directly
mkdir -p /data/mysql # establish MySQL Database storage items
chown -R mysql:mysql /data/mysql # Set up MySQL Database directory permissions
mkdir -p /usr/local/mysql # establish MySQL The installation directory
cd /opt
tar zxvf mysql-5.5..tar.gz
cd mysql-5.5. cmake -DCMAKE_INSTALL_PREFIX=/usr/local/mysql \
-DMYSQL_UNIX_ADDR=/tmp/mysql.sock \
-DMYSQL_DATADIR=/data/mysql \
-DMYSQL_USER=mysql \
make && make install
Start configuration after installation MySQL:
cp ./support-files/my-huge.cnf /etc/my.cnf # Copy configuration file ( Be careful : If /etc By default, there is a my.cnf, Direct coverage )
vi /etc/my.cnf # Edit profile , stay [mysqld] Add the following line to the section
datadir = /data/mysql # add to MySQL Database path
:wq! # Save and exit cd /usr/local/mysql start-up mysql I want to put the data file of the database under another directory when I'm working , The start command is changed to : Be careful : Instance Directory ,, There was an error during the installation .
shell>/usr/local/mysql/bin/mysqld_safe --user=mysql --log-error=/u01/mysql/mysql_error/error --datadir=/data/mysql/ At this time, there are problems ,
Because when initializing the database permission table, the permission table created by default is in the default directory /usr/local/mysql/var below , That's what happened , The above error cannot find the permission table :Can't
open and lock privilege tables: Table '' doesn't exist

./scripts/mysql_install_db --user=mysql --datadir=/data/mysql # Generate mysql System database Be careful : Because the database needs to be saved in another directory Add parameters when initializing permission table --datadir cp ./support-files/mysql.server /etc/rc.d/init.d/mysql # hold Mysql Join the system to start

chmod /etc/init.d/mysql # Add execution permission

chkconfig mysql on # chkconfig mysqld on
vi /etc/rc.d/init.d/mysql # edit
basedir = /usr/local/mysql #MySQL Program installation path
datadir = /data/mysql #MySQl Database storage directory
service mysqld start # start-up
vi /etc/profile # hold mysql Services add system environment variables : Add the following line at the end
export PATH=$PATH:/usr/local/mysql/bin
:wq! # Save and exit
 The next line myslq The library file of is linked to the default location of the system , So you're compiling something like PHP When waiting for the software, you don't need to specify mysql The library file address of .
ln -s /usr/local/mysql/include/mysql /usr/include/mysql
reboot # Need to restart the system , Wait for the system to restart and continue to operate under the terminal command line 
mysql_secure_installation # Set up Mysql password
Press... At the prompt Y enter
Then input 2 Secondary cipher
Continue to press Y enter , Until the setup is complete
Or just change the password /usr/local/mysql/bin/mysqladmin -u root -p password "" # Change Password
service mysqld restart # restart
Here we are ,mysql installation is complete !

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