Mysql set up in Linux

　　In this construction, there have been various problems have been solved can not afford to suggest that small partners do not like me, like a headless flies, that there are problems to solve this problem, there is no real sense of the nature of the problem.

　　The main problem (starred, standard focus): Be sure to look at their own version of linux, mysql Do not download a direct installation, the installation in the end, is also running out, because the binary to execute the program simply do not use. For example: mysqld, display not found. The following is the correct installation method:

　　First, check your linux operating system are few, and download the appropriate software according to their own system Mysql the median, my linux is 64.

　　　　# uname -i

　　Second, download the installation package is good, I downloaded on training materials: MySQL-5.6.35-Linux-glibc2.5-x86_64.tar.gz , the file extension is tar.gz .

　　Then download windows good software, copied to the desktop virtual machine, the file name is tar.gz, apparently compressed with tar and gzip.

　　Third, unzip, then copied into the file to decompress it with the command: tar zxvf mysql-5.6.35-linux-glibc2.5-x86_64.tar.gz, then there is an extract from the folder, extract the complete mobile directory and change the name to mysql. Then move the file to determine / usr / local path is the same as in the original folder, change the name of the command to the other and then the mysql folder to the path:

　　　# Cd Desktop

　　　# && mv /usrlocal/mysql /usr/local/mysql_old

　　　# mv mysql-5.6.35-linux-glibc2.5-x86_64 /usr/local/mysql

　　Fourth, the establishment MySQL user, the user needs to start mysql:

　　　　　　# useradd -s /sbin/nologin mysql

　　　　　　 # cd /usr/local/mysql

　　 Creating datadir, database files are put here:

　　　　　　# mkdir -p data/mysql

　　　　Change permissions, or later will get an error:

　　　　　　# chown -R mysql:mysql data/mysql

　　　　Initialized for the specified user mysql, the data storage path specified /usr/local/mysql/data/mysql:

　　　　　　# ./scripts/mysql_install_db --user=mysql --datadir=/usr/local/mysql/data/mysql

　　　　　　We can see, there were two OK above, which indicates successful initialization. If you do not succeed, probably because something is not installed, the first time, go to the local Baidu appears ERROR. For example: c with gcc not installed, "Please the install modules before the Perl The following Executing ./scripts/mysql_install_db: the Data :: Dumper" , "Directory of The parent for The Data Directory '/ Data / MySQL' path that does Not exist.If was really intended, please create that directory path and thenrestart this script. " and so on.

　　　　　Solution: 1, appears: "Please install the before at The following Perl modules Executing ./scripts/mysql_install_db: the Data :: Dumper", with the following command-line installation (remember networking)

　　　　　　　　　　　　First look:

　　　　　　　　　　　　# yum list |grep perl | grep -i Dumper

　　　　　　　　　　不知道的情况下，可以一个个去安装上面的包，这里我们知道是第一个，使用yum安装

　　　　　　　　　　　# yum install -y perl-Data-Dumper.x86_64　　

　　　　　　　　　　　再次初始化：# ./scripts/mysql_install_db --user=mysql --datadir=/usr/local/mysql/data/mysql

　　　　　　　　　　2、出现：”The parent directory for the data directory '/data/mysql' does not exist.If that path was really intended, please create that directory path and thenrestart this script.“，是提示没有这样的目录或文件，我们需要在data/mysql前面加上绝对路径：# ./scripts/mysql_install_db --user=mysql --datadir=/usr/local/mysql/data/mysql 。

　　　　　　　　　　3、提示没有libaio.so.1 ，没有就安装：# yum install -y libaio*

　　　　　　　　　　　再次初始化：# ./scripts/mysql_install_db --user=mysql --datadir=/usr/local/mysql/data/mysql

　　　　　　　检验一下：# echo $? ，输出为0，说明上一条命令已经正确执行。

　　　　五、配置Mysql ,初始化完成之后，接下来就是配置（划重点：路径要一模一样，不然最后启动不了，mysqld 命令报错）。

　　　　　　首先复制配置文件：# cp support-files/my-default.cnf /etc/my.cnf