我已经安装了Centos7更新，删除了MariaDB并完成了全新的MySQL安装 - 另外我已将其删除并重新安装它但每次我连接到mysql -u root -p时都会收到标题错误。此外，我已经查看了与此相关但尚未取得进展的其他门票。如果我运行服务mysqld restart它会显示“重定向到/ bin / systemctl重启mysqld.service”，然后挂起。真的不是Linux专家，所以不确定是什么导致这个？
答案 0 :(得分：10)
I had the same problem and found out a few things after digging around. MariaDB is a drop-in replacement for mysql. On the new system, mysql is the MariaDB client (although I'm not clear on what that means). I checked to see if the service was running:
service mysqld status
which indicated:
Redirecting to /bin/systemctl status mysqld.service mysqld.service Loaded: not-found (Reason: No such file or directory) Active: inactive (dead)
In other words, the mysqld service is not running.
Starting the service worked for me:`systemctl start mariadb.service`
Now all the mysql commands work as expected.
To tie the last knot, enable the service at boot:`systemctl enable mariadb.service`
答案 1 :(得分：0)
检查＆＃39; socket =＆＃39;在 [mysqld] 部分的/etc/my.cnf中输入：
[mysqld1]
socket = /tmp/mysql.sock1
另一种方法是提供＆＃39; -hhost＆＃39; ＆安培; ＆＃39; -Pport＆＃39; ＆＃39; mysqladmin＆＃39;的参数或者＆＃39; mysql＆＃39;命令，以避免使用套接字。
mysql -u user -hservername -P3006 -p -Dschema
mysqladmin -u user -p -hhostname -Pport
答案 2 :(得分：0)
删除dir修复它 - 删除了dir（用rm -rf“dir name”）然后unintalled mysql“yum remove mysql mysql-server”然后重新安装“yum install mysql-server”并运行“service mysqld start”
如果启动mysql服务时遇到此问题 - 请按照Jeremiah的建议检查日志/var/log/mysqld.log。
答案 3 :(得分：0)
如果您查看 MariaDB 日志文件，您可能会发现该问题与创建 pid 文件有关。解决方法：创建PID目录，然后将其所有者更改为mysql:mysql