啓動MySQL Daemon時出現問題

Question

我是新來的論壇，但我希望能夠變得更加活躍，因爲我最近購買了一臺專用服務器，並且正在運行Fedora，所以這是一個不斷學習的過程，在BASH中相當平均，但我足夠了解我的方式，我是一個軟件開發人員，不僅僅是交易網絡techi。這導致我最初的問題，我重新啓動我的dedi後開始我的MySQL守護進程的問題，我不知道爲什麼突然這樣做，我從服務器運行PHPMyAdmin，還通過CLI發出某些命令MySQL，但是在重新啓動我得到這個錯誤後，每次我嘗試啓動守護進程的實例：

[root@ks23085 ~]# service mysqld start 
Redirecting to /bin/systemctl start mysqld.service 
[root@ks23085 ~]# systemctl mysqld start 
Unknown operation mysqld 
[root@ks23085 ~]# systemctl start mysqld 
Failed to issue method call: Unit name mysqld is not valid. 
[root@ks23085 ~]# systemctl start mysqld.service 
[root@ks23085 ~]# mysql 
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/path/to/mysql.sock' (2) 

它完全是怪異，因爲它是完美的工作之前，我重新啓動它，我沒有更新或更改安裝，我做的唯一的事情是安裝postfix，但我不明白爲什麼這會導致與MySQL的任何問題：S

我真的需要在這一個手，我已經嘗試了幾個解決方案谷歌沒有無論結果如何。先謝謝你們。

~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

更新1：

好了，所以我找到了目錄mysqld正在舉行，這是 '在/ usr/libexec目錄/ mysqld的'，我輸入這個目錄中 './mysqld開始'，並指定該輸出：

120729 1:49:09 [Warning] The syntax '--log-slow-queries' is deprecated and will be removed in a future release. Please use '--slow-query-log'/'--slow-query-log-file' instead. 
120729 1:49:09 [Warning] The syntax '--log-slow-queries' is deprecated and will be removed in a future release. Please use '--slow-query-log'/'--slow-query-log-file' instead. 
120729 1:49:09 [Warning] Can't create test file /run/mysql/ks23085.lower-test 
120729 1:49:09 [Warning] Can't create test file /run/mysql/ks23085.lower-test 
./mysqld: Can't change dir to '/run/mysql/' (Errcode: 2) 
120729 1:49:09 [ERROR] Aborting 

120729 1:49:09 [Note] ./mysqld: Shutdown complete 

~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~ 更新2：

我設法通過在所有我的舊數據庫的'run /'中創建'mysql'目錄來傳遞目錄問題，但是現在我似乎得到了一個似乎並不容易解決的錯誤：/

下面是輸出：

120729 2:15:59 [Warning] The syntax '--log-slow-queries' is deprecated and will be removed in a future release. Please use '--slow-query-log'/'--slow-query-log-file' instead. 
120729 2:15:59 [Warning] The syntax '--log-slow-queries' is deprecated and will be removed in a future release. Please use '--slow-query-log'/'--slow-query-log-file' instead. 
120729 2:15:59 [Warning] Can't create test file /run/mysql/ks23085.lower-test 
120729 2:15:59 [Warning] Can't create test file /run/mysql/ks23085.lower-test 
120729 2:15:59 [Note] Plugin 'FEDERATED' is disabled. 
120729 2:15:59 [Note] Plugin 'InnoDB' is disabled. 
mysqld: Can't find file: './mysql/plugin.frm' (errno: 13) 
120729 2:15:59 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it. 
120729 2:15:59 [ERROR] mysqld: unknown option '--skip-locking' 
120729 2:15:59 [ERROR] Aborting 

120729 2:15:59 [Note] mysqld: Shutdown complete 

Answer 1

的official doc指出有此錯誤2個可能的原因：

1. You don't have permissions to access the directory /var/lib/mysql/whatever.sock because mysql is the owner of the folder or
2. /path/whatever.sock doesn't exist.

執行下面找到你的插座：

mysqladmin variables | grep socket 

添加到配置文件的建議：

You can try this though [Linux specific, but what other operating systems are there?] Go to /etc/my.cnf and change/add the lines:

[mysqld]

datadir=/var/lib/mysql

socket=/tmp/mysql.sock

[client]

socket=/tmp/mysql.sock

2）不要忘記檢查你的權限！