在我的情况下，它是磁盘已满，mysqld不能再启动。

尝试重新启动mysql服务。

> service mysql restart

or

> service mysql stop

> service mysql start

如果它不识别停止命令，那么它肯定是磁盘空间。您应该在mysql分区中分配一些空间或使磁盘更大。

检查磁盘空间

> df -h

对我来说，更新解决了这个问题:

在Ubuntu上:

sudo apt-get update
sudo apt-get upgrade

CentOS:

sudo yum update

当我停止mysql服务时，我得到了完全相同的错误，这里如何解决它:通过(重新)启动mysql使用这些命令:

sudo systemctl start mysql

or

sudo systemctl restart mysql

我看到所有这些答案，但没有一个提供重置密码的选项，没有接受的答案。实际的问题是他忘记了密码，所以他需要重置，而不是像大多数答案所暗示的那样，看看它是否正在运行(安装与否)。

重置密码

遵循以下步骤(如果你真的忘记了密码，这可能会有帮助，你可以随时尝试，即使你现在没有这种情况):

Stop mysql sudo /etc/init.d/mysql stop Or for other distribution versions: sudo /etc/init.d/mysqld stop Start MySQL in safe mode sudo mysqld_safe --skip-grant-tables & Log into MySQL using root mysql -u root Select the MySQL database to use use mysql; Reset the password -- MySQL version < 5.7 update user set password=PASSWORD("mynewpassword") where User='root'; -- MySQL 5.7, mysql.user table "password" field -> "authentication_string" update user set authentication_string=password('mynewpassword') where user='root'; Flush the privileges flush privileges; Restart the server quit Stop and start the server again Ubuntu and Debian: sudo /etc/init.d/mysql stop ... sudo /etc/init.d/mysql start

在CentOS、Fedora和RHEL上:

    sudo /etc/init.d/mysqld stop
    ...
    sudo /etc/init.d/mysqld start

使用新密码登录 Mysql -u root -p 输入新密码，再次享受您的服务器，就像什么都没有发生一样

这是从重置MySQL根密码。

而不是使用localhost:

mysql -u myuser -pmypassword -h localhost mydatabase

使用127.0.0.1

mysql -u myuser -pmypassword -h 127.0.0.1 mydatabase

(注意，-p和mpassword之间没有空格)

享受:)

This error can also occur if you try to change the directory where the database is stored, but imput the wrong directory in the configuration file (like a typo in the second drive as D instead of the accurate D_). Instead of telling you the typo directory does not exist, it will tell you that you lack permission to access it (leading you to try to change the permissions for the typo directory, which it will let you do). So if you get this error while changing directories, double check the configuration file and make sure you don't have a typo.