使用的是linode的centos7系统，安装mysql发现已经默认的是mariadb。
但是不管是使用linode官网说明还是百度搜索到的的根本安装方法无法安装成功。
总是提示这一句：
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
最后通过google 搜索 install mariadb on centos 7得到了安装的关键一步。
现在安装成功，特此备注一下整个安装过程：
mysql:[root@localhost ~]# yum -y install mariadb* Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirrors.linode.com * extras: mirrors.linode.com * updates: mirrors.linode.com Resolving Dependencies --> Running transaction check ---> Package mariadb.x86_64 1:5.5.37-1.el7_0 will be installed ---> Package mariadb-bench.x86_64 1:5.5.37-1.el7_0 will be installed ---> Package mariadb-devel.x86_64 1:5.5.37-1.el7_0 will be installed ---> Package mariadb-embedded.x86_64 1:5.5.37-1.el7_0 will be installed ---> Package mariadb-embedded-devel.x86_64 1:5.5.37-1.el7_0 will be installed ---> Package mariadb-libs.x86_64 1:5.5.37-1.el7_0 will be installed ---> Package mariadb-server.x86_64 1:5.5.37-1.el7_0 will be installed --> Processing Dependency: perl-DBD-MySQL for package: 1:mariadb-server-5.5.37-1.el7_0.x86_64 ---> Package mariadb-test.x86_64 1:5.5.37-1.el7_0 will be installed --> Running transaction check ---> Package perl-DBD-MySQL.x86_64 0:4.023-5.el7 will be installed --> Finished Dependency Resolution Dependencies Resolved ========================================================================================================== Package Arch Version Repository Size ========================================================================================================== Installing: mariadb x86_64 1:5.5.37-1.el7_0 updates 8.9 M mariadb-bench x86_64 1:5.5.37-1.el7_0 updates 385 k mariadb-devel x86_64 1:5.5.37-1.el7_0 updates 744 k mariadb-embedded x86_64 1:5.5.37-1.el7_0 updates 3.6 M mariadb-embedded-devel x86_64 1:5.5.37-1.el7_0 updates 7.4 M mariadb-libs x86_64 1:5.5.37-1.el7_0 updates 752 k mariadb-server x86_64 1:5.5.37-1.el7_0 updates 11 M mariadb-test x86_64 1:5.5.37-1.el7_0 updates 7.9 M Installing for dependencies: perl-DBD-MySQL x86_64 4.023-5.el7 base 140 k Transaction Summary ========================================================================================================== Install 8 Packages (+1 Dependent package) Total download size: 40 M Installed size: 279 M Downloading packages: (1/9): mariadb-bench-5.5.37-1.el7_0.x86_64.rpm | 385 kB 00:00:00 (2/9): mariadb-devel-5.5.37-1.el7_0.x86_64.rpm | 744 kB 00:00:00 (3/9): mariadb-embedded-5.5.37-1.el7_0.x86_64.rpm | 3.6 MB 00:00:00 (4/9): mariadb-5.5.37-1.el7_0.x86_64.rpm | 8.9 MB 00:00:00 (5/9): mariadb-libs-5.5.37-1.el7_0.x86_64.rpm | 752 kB 00:00:00 (6/9): mariadb-server-5.5.37-1.el7_0.x86_64.rpm | 11 MB 00:00:00 (7/9): mariadb-embedded-devel-5.5.37-1.el7_0.x86_64.rpm | 7.4 MB 00:00:00 (8/9): mariadb-test-5.5.37-1.el7_0.x86_64.rpm | 7.9 MB 00:00:00 (9/9): perl-DBD-MySQL-4.023-5.el7.x86_64.rpm | 140 kB 00:00:00 ---------------------------------------------------------------------------------------------------------- Total 36 MB/s | 40 MB 00:00:01 Running transaction check Running transaction test Transaction test succeeded Running transaction Instal