may be following will solve:
a. create file '/var/lib/mysql/mysql.sock' if not exist, i mean verify
b. check permission of mysql dir, logfile and other files. /var/lib/mysql
c. check the error log it will show you more details about error..
2012/4/5 Peter Boros <petya@stripped>
> What are the parameters you are trying to change? What does the error
> log say?
> On Thu, 2012-04-05 at 14:40 +0000, Manivannan S. wrote:
> > I am not facing the MySQL server problem during installation. I
> have installed those two rpm packages in my machine successfully and
> started working in mysql.
> > I am trying to the change parameter value in my.cnf file to tune
> up the server for performance improvements. For that I stopped MySQL server
> and try to restart the MySQL service from that moment onwards I am getting
> this kind of errors like
> > Starting MySQL.Manager of pid-file quit without updating file
> > MySQL manager or server PID file could not be found! [FAILED]
> > ERROR 2002 (HY000): Can't connect to local MySQL server through
> socket '/var/lib/mysql/mysql.sock' (111)
> > I can't go with any other installable packages by keeping the same
> package I have to solve this issue. Please give some ideas to resolve this
> > -----Original Message-----
> > From: lists-mysql [mailto:replies-lists-b3z1-mysql@stripped
> > Sent: Thursday, April 05, 2012 5:28 PM
> > To: Manivannan S.
> > Subject: RE: Error in starting MySQL service on LINUX
> > ------------ Original Message ------------
> > > Date: Thursday, April 05, 2012 11:04:48 AM +0000
> > > From: "Manivannan S." <manivannan_s@stripped>
> > > To: mysql@stripped
> > > Subject: RE: Error in starting MySQL service on LINUX
> > >
> > > I am not using random binaries. I am using rpm packages only which are
> > > already tested and preconfigured. By installing rpm package also I am
> > > facing the same issue.
> > >
> > I'm not certain where you got the packages you installed:
> > MySQL-client-5.1.52-1.glibc23.x86_64.rpm
> > MySQL-server-5.1.52-1.glibc23.x86_64.rpm
> > but they are not from the rhel/centos repos. If you install packages
> from the appropriate repos it will take care of setting up the startup
> scripts, etc. for your environment. If you install packages/rpm files from
> some other location you'll need to do the configuration and setup yourself,
> as is your current situation.
> > I would suggest removing the above and doing a "yum install". The
> current packages in the rhel-6/centos-6 context are:
> > mysql-5.1.61-1.el6_2.1.x86_64
> > mysql-server-5.1.61-1.el6_2.1.x86_64
> > If, for some reason, you want to stick with what you've installed then
> you'll need to work on doing the setup/configuration manually.
> > - Richard
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