RedHat Linux AS4下MySQL兩個(gè)問(wèn)題的處理

發(fā)布時(shí)間: 2012/8/14 18:04:48

問(wèn)題1：登錄mysql的錯(cuò)誤
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
解決方法：
1)默認(rèn)的mysql.sock文件是在/tmp目錄下。
2)我們建立一個(gè)軟連接，ln -s /tmp/mysql.sock /var/lib/mysql/mysql.sock
-

問(wèn)題2：Timeout error occurred trying to start MySQL Daemon.
#/etc/init.d/mysqld restart
stopping mysql [ok]
Timeout error occurred trying to start MySQL Daemon. [failure]
但是這個(gè)時(shí)候mysql實(shí)際上已經(jīng)起動(dòng)了,因?yàn)橛胣etstat -ln命令去看3306端口已經(jīng)起動(dòng).使用mysql -u root -p password也能連接到數(shù)據(jù)庫(kù).

解決方法：
修改/etc/init.d/mysqld.
在mysql里創(chuàng)建dameon用戶(hù),然后再修改/etc/init.d/mysqld.
具體操作如下：
我們不妨先看看/etc/init.d/mysqld起動(dòng)腳本是如何工作的,注意下面的一段
# If you've removed anonymous users, this line must be changed to
        # use a user that is allowed to ping mysqld.
        ping="/usr/bin/mysqladmin -uUNKNOWN_MYSQL_USER ping"
        # Spin for a maximum of ten seconds waiting for the server to come up
        if [ $ret -eq 0 ]; then
            for x in 1 2 3 4 5 6 7 8 9 10; do
            if [ -n "`$ping 2> /dev/null`" ]; then
                    break;
            else
                    sleep 1;
            fi
            done
            if !([ -n "`$ping 2> /dev/null`" ]); then
                    echo "Timeout error occurred trying to start MySQL
Daemon."                    action $"Starting $prog: " /bin/false
            else
                    action $"Starting $prog: " /bin/true
            fi
        else
            action $"Starting $prog: " /bin/false
        fi
        [ $ret -eq 0 ] && touch /var/lock/subsys/mysqld
        return $ret

    我們看到,腳本判斷mysql是否起動(dòng),使用的是mysqladmin ping命令.
    而這個(gè)命令想要正確執(zhí)行是需要能夠登錄mysql的.現(xiàn)在一些默認(rèn)帳號(hào)已經(jīng)刪除,而且其它帳號(hào)已經(jīng)設(shè)置了密碼(默認(rèn)沒(méi)有設(shè)置密碼).于是它沒(méi)有辦法連接到mysql.
   于是我用了下面的辦法解決.
   a)建立一個(gè)帳號(hào),不設(shè)置密碼,不給任何權(quán)限.
   b)修改/etc/init.d/mysqld
   下面我給出具體操作
   #mysql -u root -p passwd
   mysql>GRANT select ON test.* TO daemon@localhost
   mysql>revoke select on test.* from daemon@localhost
   vi打開(kāi)/etc/init.d/mysqld
   把下面這行
   ping="/usr/bin/mysqladmin -uUNKNOWN_MYSQL_USER ping"