12-09-2014
MySQL Database Missing on UNIX server. Possible to recover?
My dedicated server is VERY old (running Apache/1.3.37 (Unix) PHP/4.4.4 FrontPage/5.0.2.2510).
We have a script that runs and manages our customer database. Early in the morning last Friday, it was working fine and processed data as usual. Later in the day, we got this error:
Cannot connect to MySQL: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111)
We contacted support (which is minimal since its a dedicated server) and they told us:
"The server is compromised and the operating system would need to be re-imaged. me clients have been reluctant to upgrade for various reasons, and now we're in a situation where the known vulnerabilities are being exploited. The issue with the server is that MySQL is broken and is missing critical system files."
When we went in via Putty to retrieve the database, the folder that I believe it should be in was empty (I should add that they did a reboot)
Is the data lost? Is there a way to retrieve it? Unfortunately, the last full backup I ran on it was a year ago. While that's better than nothing, I'm hoping there is something that can be done to get the current copy.
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LEARN ABOUT PHP
mysql_pconnect
MYSQL_PCONNECT(3) 1 MYSQL_PCONNECT(3)
mysql_pconnect - Open a persistent connection to a MySQL server
SYNOPSIS
Warning
This extension is deprecated as of PHP 5.5.0, and will be removed in the future. Instead, the MySQLi or PDO_MySQL extension should
be used. See also MySQL: choosing an API guide and related FAQ for more information. Alternatives to this function include:
omysqli_connect(3) with
p: host prefix
o PDO::__construct with PDO::ATTR_PERSISTENT as a driver option
resource mysql_pconnect ([string $server = ini_get("mysql.default_host")], [string $username = ini_get("mysql.default_user")], [string
$password = ini_get("mysql.default_password")], [int $client_flags])
DESCRIPTION
Establishes a persistent connection to a MySQL server.
mysql_pconnect(3) acts very much like mysql_connect(3) with two major differences.
First, when connecting, the function would first try to find a (persistent) link that's already open with the same host, username and
password. If one is found, an identifier for it will be returned instead of opening a new connection.
Second, the connection to the SQL server will not be closed when the execution of the script ends. Instead, the link will remain open for
future use (mysql_close(3) will not close links established by mysql_pconnect(3)).
This type of link is therefore called 'persistent'.
o $server
- The MySQL server. It can also include a port number. e.g. "hostname:port" or a path to a local socket e.g. ":/path/to/socket"
for the localhost. If the PHP directive mysql.default_host is undefined (default), then the default value is 'localhost:3306'
o $username
- The username. Default value is the name of the user that owns the server process.
o $password
- The password. Default value is an empty password.
o $client_flags
- The $client_flags parameter can be a combination of the following constants: 128 (enable LOAD DATA LOCAL handling),
MYSQL_CLIENT_SSL, MYSQL_CLIENT_COMPRESS, MYSQL_CLIENT_IGNORE_SPACE or MYSQL_CLIENT_INTERACTIVE.
Returns a MySQL persistent link identifier on success, or FALSE on failure.
+--------+---------------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------------------+
| 5.5.0 | |
| | |
| | This function will generate an E_DEPRECATED |
| | error. |
| | |
+--------+---------------------------------------------------+
Note
Note, that these kind of links only work if you are using a module version of PHP. See the Persistent Database Connections section
for more information.
Warning
Using persistent connections can require a bit of tuning of your Apache and MySQL configurations to ensure that you do not exceed
the number of connections allowed by MySQL.
Note
You can suppress the error message on failure by prepending a @ to the function name.
mysql_connect(3), Persistent Database Connections.
PHP Documentation Group MYSQL_PCONNECT(3)