Here's what nmap gives on my system:

PORT     STATE SERVICE
22/tcp   open  ssh
.
.
.
3306/tcp open  mysql

-- Mike

From: Qiubo Su (David Su) <qiubosu@gmail.com>
To: support@drupal.org; erik.saline@gmail.com
Sent: Thu, November 4, 2010 4:27:20 PM
Subject: Re: [support] urgently need help for Site off-line error

hello erik,

below are the results a) to e) by running the commands:

a) root@quicksu-desktop:/home/quicksu# netstat -a | grep mysql

b) root@quicksu-desktop:/home/quicksu# netstat -a | grep 3006

c) root@quicksu-desktop:/home/quicksu# nmap localhost

Starting Nmap 5.00 ( http://nmap.org ) at 2010-11-05 12:19 NZDT
Warning: Hostname localhost resolves to 2 IPs. Using 127.0.0.1.
Interesting ports on localhost (127.0.0.1):
Not shown: 996 closed ports
PORT    STATE SERVICE
21/tcp  open  ftp
80/tcp  open  http
443/tcp open  https
631/tcp open  ipp

Nmap done: 1 IP address (1 host up) scanned in 0.42 seconds

d) root@quicksu-desktop:/home/quicksu# nmap -A -T4 localhost

Starting Nmap 5.00 ( http://nmap.org ) at 2010-11-05 12:21 NZDT
Warning: Hostname localhost resolves to 2 IPs. Using 127.0.0.1.
Interesting ports on localhost (127.0.0.1):
Not shown: 996 closed ports
PORT    STATE SERVICE VERSION
21/tcp  open  ftp     vsftpd 2.2.2
80/tcp  open  http    Apache httpd 2.2.14 ((Ubuntu))
|  robots.txt: has 36 disallowed entries (15 shown)
|  /includes/ /misc/ /modules/ /profiles/ /scripts/
|  /sites/ /themes/ /CHANGELOG.txt /cron.php /INSTALL.mysql.txt
|  /INSTALL.pgsql.txt /install.php /INSTALL.txt /LICENSE.txt
|_ /MAINTAINERS.txt
|_ html-title: Site off-line | Drupal
443/tcp open  http    Apache httpd 2.2.14 ((Ubuntu))
|  robots.txt: has 36 disallowed entries (15 shown)
|  /includes/ /misc/ /modules/ /profiles/ /scripts/
|  /sites/ /themes/ /CHANGELOG.txt /cron.php /INSTALL.mysql.txt
|  /INSTALL.pgsql.txt /install.php /INSTALL.txt /LICENSE.txt
|_ /MAINTAINERS.txt
|_ html-title: Site off-line | Drupal
631/tcp open  ipp     CUPS 1.4
No exact OS matches for host (If you know what OS is running on it, see http://nmap.org/submit/ ).
TCP/IP fingerprint:
OS:SCAN(V=5.00%D=11/5%OT=21%CT=1%CU=30003%PV=N%DS=0%G=Y%TM=4CD34015%P=i686-
OS:pc-linux-gnu)SEQ(SP=CA%GCD=1%ISR=CC%TI=Z%CI=Z%II=I%TS=8)SEQ(SP=CA%GCD=2%
OS:ISR=CC%TI=Z%CI=Z%II=I%TS=8)OPS(O1=M400CST11NW6%O2=M400CST11NW6%O3=M400CN
OS:NT11NW6%O4=M400CST11NW6%O5=M400CST11NW6%O6=M400CST11)WIN(W1=8000%W2=8000
OS:%W3=8000%W4=8000%W5=8000%W6=8000)ECN(R=Y%DF=Y%T=40%W=8018%O=M400CNNSNW6%
OS:CC=Y%Q=)T1(R=Y%DF=Y%T=40%S=O%A=S+%F=AS%RD=0%Q=)T2(R=N)T3(R=Y%DF=Y%T=40%W
OS:=8000%S=O%A=S+%F=AS%O=M400CST11NW6%RD=0%Q=)T4(R=Y%DF=Y%T=40%W=0%S=A%A=Z%
OS:F=R%O=%RD=0%Q=)T5(R=Y%DF=Y%T=40%W=0%S=Z%A=S+%F=AR%O=%RD=0%Q=)T6(R=Y%DF=Y
OS:%T=40%W=0%S=A%A=Z%F=R%O=%RD=0%Q=)T7(R=Y%DF=Y%T=40%W=0%S=Z%A=S+%F=AR%O=%R
OS:D=0%Q=)U1(R=Y%DF=N%T=40%IPL=164%UN=0%RIPL=G%RID=G%RIPCK=G%RUCK=G%RUD=G)I
OS:E(R=Y%DFI=N%T=40%CD=S)

Network Distance: 0 hops
Service Info: OS: Unix

OS and Service detection performed. Please report any incorrect results at http://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 30.47 seconds

e) root@quicksu-desktop:/home/quicksu# ps aux | grep mysql | grep -v grep

On Fri, Nov 5, 2010 at 11:52 AM, Erik Saline <erik.saline@gmail.com> wrote:
netstat -a shows open or waiting connections.  Run this to see if
mysql or port 3306 is in the list.
nmap will show open ports on a server

Could be permissions issues.

Sounds like mysql might be running already.  What does the following
command show show?

ps aux |grep mysql|grep -v grep

If it returns anything mysql already started up


Google is usually the place I look to solve crazy mysql issues.


http://www.linuxforums.org/forum/servers/41668-mysql-problems-_-solved-_.html
http://www.linuxforums.org/forum/red-hat-fedora-linux/31155-error-2002-hy000-cant-connect-local-mysql-server.html


On Thu, Nov 4, 2010 at 3:41 PM, Qiubo Su (David Su) <qiubosu@gmail.com> wrote:
> hello victor,
>
> i did notice this and update the base memory RAM to 1G.
>
> it is ubuntu 10.0.4.
>
> On Fri, Nov 5, 2010 at 11:23 AM, Victor Kane <victorkane@gmail.com> wrote:
>>
>> Check the memory assigned to the VM and make sure it is enough to start
>> all the processes.
>> If it turns out that this is the case, you should be able to allocate
>> additional memory for that VM process in its configuration.
>> What is the base system?
>> Victor
>>
>> On Thu, Nov 4, 2010 at 7:05 PM, Michael Hannon <jm_hannon@yahoo.com>
>> wrote:
>>>
>>> Are you sure this isn't some kind of a firewall issue?  A simple, but
>>> slightly dangerous, test would be to:
>>>
>>>     (1) Turn off the firewall
>>>     (2) Try to make your connection
>>>     (3) Regardless of the outcome of (2), immediately turn the firewall
>>> back on.
>>>
>>> -- Mike
>>>
>>> From: Qiubo Su (David Su) <qiubosu@gmail.com>
>>> To: support@drupal.org; cjones@partialflow.com
>>> Sent: Thu, November 4, 2010 1:59:15 PM
>>> Subject: Re: [support] urgently need help for Site off-line error
>>>
>>> hello Christopher,
>>>
>>> i run apt-get install --reinstall mysql-server and start
>>> /etc/init.d/mysql start, but still got the same error "ERROR 2002 (HY000):
>>> Can't connect to local MySQL server through socket
>>> '/var/run/mysqld/mysqld.sock' (2)".
>>>
>>> i even create /var/run/mysqld/mysqld.sock file and then restart mysql,
>>> but the mysqld.sock file disappear and get the same error.
>>>
>>> i got this problem when i finished install/configure drupal site and make
>>> it up and running, can browse the drupal site, loging from phpmyadmin, run
>>> /etc/init.d/mysql start without any issue, log to mysql from command line
>>> without any issue, then i restart the VM (use VM for this), then got the
>>> above problem.
>>>
>>>
>>>
>>> On Fri, Nov 5, 2010 at 3:24 AM, Christopher M. Jones
>>> <cjones@partialflow.com> wrote:
>>>>
>>>> The log is telling you that the users table doesn't exist. I don't know
>>>> how you installed mysql, or what distro you are using. If you installed
>>>> using a package management tool then an administrative user should have
>>>> been created. Review your installation process and make sure that all
>>>> the necessary databases and tables are there, including the one
>>>> mentioned in your logs. If you're using apt / dpkg and friends on a
>>>> debian system, then you might try something like
>>>>
>>>> apt-get install --reinstall mysql-server
>>>>
>>>> On 11/03/2010 07:56 PM, Qiubo Su (David Su) wrote:
>>>> > dear drupal support,
>>>> >
>>>> > "/var/run/mysqld/" does exists. edit */etc/mysql/my.cnf* file to have
>>>> > "bind-address" set to localhost and "socket" is set to
>>>> > /var/run/mysqld/mysqld.sock already.
>>>> >
>>>> > but after run /etc/init.d/mysql start, still got below output
>>>> >
>>>> > Rather than invoking init scripts through /etc/init.d, use the
>>>> > service(8)
>>>> > utility, e.g. service mysql restart
>>>> >
>>>> > Since the script you are attempting to invoke has been converted to an
>>>> > Upstart job, you may also use the restart(8) utility, e.g. restart
>>>> > mysql
>>>> >
>>>> > mysql start/running
>>>> >
>>>> > run mysql, still got below output as well
>>>> >
>>>> > ERROR 2002 (HY000): Can't connect to local MySQL server through socket
>>>> > '/var/run/mysqld/mysqld.sock' (2)
>>>> >
>>>> > tail -10f /var/log/mysql/error.log, still got the same error
>>>> >
>>>> > 101104 12:41:09 [Note] Plugin 'FEDERATED' is disabled.
>>>> > 101104 12:41:09  InnoDB: Started; log sequence number 0 44233
>>>> > 101104 12:41:09 [ERROR] Fatal error: Can't open and lock privilege
>>>> > tables: Table 'mysql.user' doesn't exist
>>>> >
>>>> > by the way, the server use dynamic IP address and the
>>>> > /etc/network/interfaces is as below
>>>> >
>>>> > auto lo
>>>> > iface lo inet loopback
>>>> >
>>>> >
>>>> > On Thu, Nov 4, 2010 at 12:11 PM, Michel Morelli
>>>> > <michel@ziobuddalabs.it
>>>> > <mailto:michel@ziobuddalabs.it>> wrote:
>>>> >
>>>> >     Il 03/11/2010 21:35, Qiubo Su (David Su) ha scritto:
>>>> >>     hello drupal support team,
>>>> >>
>>>> >>     thanks for your reply.
>>>> >>     i tried /etc/init.d/mysql start and it is ok for the database,
>>>> >>     however, after i reboot the pc and run /etc/init.d/mysql start as
>>>> >>     below, it doesn't work again. thanks for your help with this
>>>> >> again.
>>>> >>
>>>> >>     root@quicksu-desktop:/var/www/sites/all/modules#
>>>> >> /etc/init.d/mysql
>>>> >>     start
>>>> >>
>>>> >>     Rather than invoking init scripts through /etc/init.d, use the
>>>> >>     service(8)
>>>> >>     utility, e.g. service mysql start
>>>> >>
>>>> >>     Since the script you are attempting to invoke has been converted
>>>> >> to an
>>>> >>
>>>> >>     Upstart job, you may also use the start(8) utility, e.g. start
>>>> >> mysql
>>>> >>     start: Job is already running: mysql
>>>> >>
>>>> >>     root@quicksu-desktop:/var/www/sites/all/modules# mysql
>>>> >>     ERROR 2002 (HY000): Can't connect to local MySQL server through
>>>> >>     socket '/var/run/mysqld/mysqld.sock' (2)
>>>> >     Hi, try to see if "/var/run/mysqld/" exist.
>>>> >     Try to edit */etc/mysql/my.cnf* file and see if "bind-address" is
>>>> >     set to localhost and if "socket" is set to
>>>> > /var/run/mysqld/mysqld.sock.
>>>> >
>>>> >     M.
>>>> >
>>>> >     --
>>>> >     Michel'ZioBudda'  Morellimichel@ziobuddalabs.it
>>>> >  <mailto:michel@ziobuddalabs.it>
>>>> >     Sviluppo applicazioni CMS DRUPAL e web dinamiche (LAMP+Ajax)
>>>> >     Telefono: 0200619074
>>>> >     Telefono Cell: +39-3939890025 --  Fax: +39-0291390660
>>>> >
>>>> >     http://www.ziobudda.net                          ICQ: 58351764
>>>> >     http://www.ziobuddalabs.it                       Skype: zio_budda
>>>> >     http://www.ziodrupal.net
>>>> >  MSN:michel@ziobuddalabs.it  <mailto:michel@ziobuddalabs.it>
>>>> >
>>>> > JABBER:michel@ziobuddalabs.it  <mailto:michel@ziobuddalabs.it>
>>>> >
>>>> >
>>>> --
>>>> [ Drupal support list | http://lists.drupal.org/ ]
>>>
>>>
>>>
>>> --
>>> [ Drupal support list | http://lists.drupal.org/ ]
>>
>>
>> --
>> [ Drupal support list | http://lists.drupal.org/ ]
>
>
> --
> [ Drupal support list | http://lists.drupal.org/ ]
>
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