mysql所在機器關機重啟後，mysql無法啟動，啟動一直報錯MySQL is not running, but PID file exists，

嘗試了所有的啟動方式，都無法啟動，在使用mysqld restart啟動時，看到一個提示說：

/usr/sbin/mysqld:cant't change dir to 'XXXX'

想到這個可能是許可權導致的問題，進行查詢發現，許可權沒有問題，根據百度提示的selinux,

設定為permissive模式之後正常啟動mysqld。

程式碼如下：

[[email protected] selinux]# getenforce
Enforcing
[
 
[email protected] selinux]# setenforce 0
[[email protected] selinux]# getenforce
Permissive

程式碼如下：

# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#     enforcing - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of enforcing.
#     disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of these two values:
#     targeted - Targeted processes are protected,
#     mls - Multi Level Security protection.
SELINUXTYPE=targeted