Ubuntu、mysql伺服器連接

大家好，請忽略我的菜鳥，

我的問題從在 ubuntu 12.04 上連接到 mysql 開始

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

在調試和Google搜尋後，我在error.log中發現了以下內容，

130714 11:23:45 [Note] Plugin 'FEDERATED' is disabled.
^G/usr/sbin/mysqld: Can't find file: './mysql/plugin.frm' (errno: 13)
130714 11:23:45 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
130714 11:23:45 InnoDB: The InnoDB memory heap is disabled
130714 11:23:45 InnoDB: Mutexes and rw_locks use GCC atomic builtins
130714 11:23:45 InnoDB: Compressed tables use zlib 1.2.3.4
^G/usr/sbin/mysqld: Can't create/write to file '/tmp/ibcN8p9L' (Errcode: 13)
130714 11:23:45  InnoDB: Error: unable to create temporary file; errno: 13
130714 11:23:45 [ERROR] Plugin 'InnoDB' init function returned error.
130714 11:23:45 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
130714 11:23:45 [ERROR] Unknown/unsupported storage engine: InnoDB
130714 11:23:45 [ERROR] Aborting

這是我的一些配置/etc/mysql/my.cnf

user            = mysql
pid-file        = /var/run/mysqld/mysqld.pid
socket          = /var/run/mysqld/mysqld.sock
port            = 3306
basedir         = /usr
datadir         = /var/lib/mysql
tmpdir          = /tmp
lc-messages-dir = /usr/share/mysql
skip-external-locking

這是我通過執行獲得的磁碟空間資訊df -h

Filesystem      Size  Used Avail Use% Mounted on
/dev/vda         20G  2.0G   17G  11% /
udev            246M  4.0K  246M   1% /dev
tmpfs           100M  200K   99M   1% /run
none            5.0M     0  5.0M   0% /run/lock
none            248M     0  248M   0% /run/shm

這是我的記憶體使用詳細資訊

            total       used       free     shared    buffers     cached
Mem:           495         93        401          0         16         49
-/+ buffers/cache:         28        467
Swap:            0          0          0

當我執行mysql_install_db或mysql_upgrade（如錯誤詳細資訊中所述）時，它給了我

Installing MySQL system tables...

Installation of system tables failed!  Examine the logs in
/var/lib/mysql for more information.

You can try to start the mysqld daemon with:

   shell> /usr/sbin/mysqld --skip-grant &

and use the command line tool /usr/bin/mysql
to connect to the mysql database and look at the grant tables:

   shell> /usr/bin/mysql -u root mysql
   mysql> show tables

Try 'mysqld --help' if you have problems with paths.  Using --log
gives you a log in /var/lib/mysql that may be helpful.

Please consult the MySQL manual section
'Problems running mysql_install_db', and the manual section that
describes problems on your OS.  Another information source are the
MySQL email archives available at http://lists.mysql.com/.

Please check all of the above before mailing us!  And remember, if
you do mail us, you MUST use the /usr/scripts/mysqlbug script!

我google了很多，有人說要重新啟動然後啟動mysql服務，有人建議重新安裝mysql，但我仍然無法使其正確。請幫我。

謝謝

我會嘗試以下方法：

sudo mv /var/lib/mysql /var/lib/mysql_bak
sudo mysql_install_db
sudo /etc/init.d/mysql start
sudo netstat -anp | grep 3306

本質上，您是在備份 MySQL 數據目錄，然後重新初始化它並啟動 MySQL。netstat 命令將檢查偵聽埠 3306 的任何程序。

如果您在啟動 MySQL 時遇到問題，請再次檢查 error.log。

我首先會嘗試錯誤行的建議，如“請執行 mysql_upgrade 來創建它。”。

df -h然後，我將通過執行並確保有足夠的可用空間來檢查您的 mysql 分區上的磁碟空間。還執行htop或free -m檢查您的記憶體使用率tmpfs並確保您有足夠的空間。tmp無法在其中一行中寫入空間意味著空間問題。

innoDB 的使用似乎也存在問題，因此這可能需要進一步調查。

還要確保當時 MySQL 正在執行。但是，從您的評論來看，我假設您無法啟動 MySQL。

引用自：https://serverfault.com/questions/523206