1、常见软件的安装方式及优缺点:
yum安装
yum -y install 软件名
优点:简单,高效,自动解决安装包之间的依赖问题
缺点:无法定制
rpm安装
rpm -ivh 包名.rpm
优点:可以定制
缺点:主要是各个包之间的依赖关系
编译安装
configure (配置) make(编译) make install(安装)
优点:可以定制
缺点:复杂,低效
2、mysql的安装过程(源码安装:https://blog.51cto.com/13754781/2300378)
mysql安装包的获取:
链接:https://pan.baidu.com/s/1lxKIEw1ec4iMOaYvrrMZFA
提取码:yzm5

    useradd mysql -s /sbin/nologin -M
    cd  /home/tools      #存放mysql-5.5.49-linux2.6-x86_64.tar.gz      
    tar xf mysql-5.5.49-linux2.6-x86_64.tar.gz
    mv  mysql-5.5.49-linux2.6-x86_64  /application/mysql-5.5.49
    ln -s  /application/mysql-5.5.49/   /application/mysql
    cd /application/mysql
    chown -R mysql.mysql /application/mysql/
    ./scripts/mysql_install_db  --basedir=/application/mysql/  --datadir=/application/mysql/data/  --user=mysql
    /bin/cp support-files/my-small.cnf /etc/my.cnf(忽略提示)
    cp support-files/mysql.server /etc/init.d/mysqld
     sed -i 's#/usr/local/mysql#/application/mysql#g' /application/mysql/bin/mysqld_safe /etc/init.d/mysqld 
     /etc/init.d/mysqld start
     echo 'export PATH=/application/mysql/bin:$PATH'>>/etc/profile
     source  /etc/profile
    systemctl enable mysqld
    mysqladmin -u root password 'workjob'   #更改mysql的登录密码,默认无登录密码
    mysql -u root -p