Can t connect to local MySQL server through socket var lib mysql mysql sock 2

Question

I am getting the following error when I try to connect to mysql    Can t connect to local MySQL server through socket   var lib mysql mysql sock   2   Is there a solution for this error  What might be the reason behind it

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Try first 2  3 solutions  Error is stil popup  amp  If you can not find  var lib mysql mysql sock   find  var  -name mysql sock   Check the space available in  var    df   If the directory is full remove some unusefull files directories  rm  var cache     Probably your issue will sorted now

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Please ensure you have installed MySQL server correctly  I met this error many times and I think it s complicated to debug from the socket  I mean it might be easier to reinstall it   If you are using CentOS 7  here is the correct way to install it   First of all  add the mysql community source yum install http   dev mysql com get mysql-community-release-el7-5 noarch rpm  Then you can install it by yum install mysql-community-server  Start it with systemctl  systemctl start mysqld

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Make sure you have enough space left in  var  If Mysql demon is not able to write additional info to the drive the mysql server won t start and it leads to the error Can t connect to local MySQL server through socket   var lib mysql mysql sock   2   Consider using   expire logs days   10 max binlog size   100M   This will help you keep disk usage down

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If your file my cnf  usually in the etc folder  is correctly configured with  socket  var lib mysql mysql sock   you can check if mysql is running with the following command   mysqladmin -u root -p status   try changing your permission to mysql folder  If you are working locally  you can try   sudo chmod -R 777  var lib mysql    that solved it for me

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Please check whether another mysql service is running

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I have the same problem and when I digged into the log   sudo tail -f  var log mysqld log  InnoDB  mmap 137363456 bytes  failed  errno 12 200610  6 27 27 InnoDB  Completed initialization of buffer pool 200610  6 27 27 InnoDB  Fatal error  cannot allocate memory for the buffer pool 200610  6 27 27  ERROR  Plugin  InnoDB  init function returned error  200610  6 27 27  ERROR  Plugin  InnoDB  registration as a STORAGE ENGINE failed  200610  6 27 27  ERROR  Unknown unsupported storage engine  InnoDB 200610  6 27 27  ERROR  Aborting   Clearly there s not enough memory and stopping InnoDB to start  I realized I never set up the swap file     I followed this to set up the swap file and it works

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The MySQL server is not running  or that is not the location of its socket file  check my cnf

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In my case  I was importing a new database  and I wasnt able to connect again after that  Finally I realized that was a space problem    So you can delete the last database and expand you hard drive or what I did  restored a snapshot of my virtual machine   Just in case someone thinks that is useful

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Are you connecting to  localhost  or  127 0 0 1    I noticed that when you connect to  localhost  the socket connector is used  but when you connect to  127 0 0 1  the TCP IP connector is used  You could try using  127 0 0 1  if the socket connector is not enabled working

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Ensure that your mysql service is running  service mysqld start   Then  try the one of the following following    if you have not set password for mysql   mysql -u root   if you have set password already  mysql -u root -p

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I came to this issue when i reinstall mariadb with yum  which rename my  etc my cnf d client cnf to  etc my cnf d client cnf rpmsave but leave  etc my cnf unchanged  For I has configed mysqld s socket in  etc my cnf  and mysql s socket in  etc my cnf d client cnf with customized path  So after the installation  mysql client cannot find the mysql s socket conf  so it try to use the default socket path to connect the msyqld  which will cause this issue  Here are some steps to locate this isue   check if mysqld is running with ps -aef   grep mysqld   ps -aef   grep mysqld   grep -v grep mysql    19946     1  0 09 54          00 00 03  usr sbin mysqld   if mysqld is running  show what socket it use with netstat -ln   grep mysql   netstat -ln   grep mysql unix  2        ACC       STREAM     LISTENING     560340807  data mysql mysql sock   check if the socket is mysql client trying to connect  if not  edit  etc my conf d client cnf or my conf to make the socket same with it in mysqld   client  socket  data mysql mysql sock  You also can edit the mysqld s socket  but you need to restart or reload mysqld

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First enter  service mysqld start  and login

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so it tells you that they cannot find the socket file at   var lib mysql mysql sock   what you ll do is you need to connect the mysql sock file to it most probably it is at  tmp mysql sock if the file doesn  exist create it using  touch  tmp mysql sock   and then execute  sudo ln -s  tmp mysql sock  var lib mysql mysql sock  note if there is no mysql directory inside  var lib create it   mkdir mysql  refresh your app

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if you change files in  var lib mysql   like copy or replace that     you must set owner of files to mysql this is so important if mariadb service restart has been faild  chown -R mysql mysql  var lib mysql   chmod -R 700  var lib mysql

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try  echo 0  gt   selinux enforce

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Most likely mysql sock does not exist in  var lib mysql    If you find the same file in another location then symlink it   For ex  I have it in  data mysql datadir mysql sock  Switch user to mysql and execute as mentioned below   su mysql  ln -s  data mysql datadir mysql sock  var lib mysql mysql sock   That solved my problem

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This might be a stupid suggestion but make 100  sure your DB is still hosted at localhost  For example  if a Network Admin chose  or changed to  Amazon DB hosting  you will need that hostname instead

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It worked for me with the following changes  Whatever path for socket is mentioned in  mysqld  and same in  client  in my cnf and restart mysql   mysqld  socket  var lib mysql mysql sock    client  socket  var lib mysql mysql sock

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Just rain into the same problem -- and here s how I addressed it   Assuming mysqld is running  then the problem might just be the mysql client not knowing where to look for the socket file   The most straightforward way to address this consists in adding the following line to your user s profile  my cnf file  on linux that s usually under  home myusername    socket  lt path to the mysql socket file gt    If you don t have a  my cnf file there  then create one containing the following    mysql  socket  lt path to the mysql socket file gt    In my case  since I moved the mysql default data folder   var lib mysql  in a different location   data mysql   I added to  my cnf the following    mysql  socket  data mysql mysql sock   Hope this helps

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Navicat15  Can t connect to local MySQL server through socket   var lib mysql mysql sock   Ubuntu16 04  if mysql server is running and the configure in  etc mysql like this    mysqld  socket    var run mysqld mysqld sock  Then Navicat15 localhost default setting is    var lib mysql mysql sock   You can edit in addvance like this

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If you are in the shell of sf net  try   mysql --host mysql- LETTER  --user  LETTER  GROUP ID admin -p   Change  LETTER  and  GROUP ID  as shown in your MySQL Database of project admin profile

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ran into this issue while trying to connect mysql in SSH client  found adding the socket path to the command helpful when switching between sockets is necessary    gt  mysql -u user -p --socket  path to mysql5143 sock

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In my case I have moved socket file to another location inside  etc my cnf  from  var lib mysql mysql sock to  tmp mysql sock  Even after restarting the mysqld service  I still see the error message when I try to connect  ERROR 2002  HY000   Can t connect to local MySQL server through socket   var lib mysql mysql sock   2   The problem is with the way that the client is configured  Running diagnostics will actually show the correct socket path  eg ps aux   grep mysqld  Works   mysql -uroot -p -h127 0 0 1 mysql -uroot -p --socket  tmp mysql sock   Does not Work   mysql -uroot -p mysql -uroot -p -hlocalhost   You can fix this problem by adding the same socket line under  client  section inside mysql config

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This is a problem if you are running out of disk space  Solution is to free some space from the HDD   Please read more to have the explanation    If you are running MySQL at LINUX check the free space of HDD with the command disk free     df    if you are getting something like that    Filesystem           1K-blocks      Used Available Use  Mounted on  dev sda2              5162828   4902260         0 100    udev                    156676        84    156592   1   dev  dev sda3              3107124     70844   2878444   3   home   Then this is the problem and now you have the solution   Since mysql sock wants to be created at the mysql folder which is almost always under the root folder could not achieve it because lack of space   If you are periodicaly give the ls command under the mysql directory  at openSUSE 11 1 is at  var lib mysql  you will get something like    hostname  var lib mysql    protected  IT     files        ibdata1             mysqld log  systemtemp  tmp        NEWS   greekDB      mysql               mysqld pid  test ARXEIO      TEMP1  ib logfile0  mysql sock          polis DATING      deisi  ib logfile1  mysql upgrade info  restore   The mysql sock file appearing and disappearing often  you must to try allot with the ls to hit a instance with the mysql sock file on folder    This caused by not enough disk space   I hope that i will help some people     Thanks

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Make sure you started the server   mysql server start   Then connect with root user   mysql -uroot

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Check if your mysqld service is running or not  if not run  start the service   If your problem isn t solved  look for  etc my cnf and modify as following  where you see a line starting with socket  Take a backup of that file before doing this update     socket  var lib mysql mysql sock     Change to  socket  opt lampp var mysql mysql sock -u root

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Note that while mysql reads the info of the location of the socketfile from the my cnf file  the mysql secure installation program seems to not do that correctly at times   So if you are like me and shuffle things around at installationtime you might get into the situation where you can connect to the database with mysql just fine  but the thing can not be secured  not using that script anyway    To fix this the suggestion from sreddy works well  make a softlink from where the script would expect the socket to where it actually is  Example   ln -s  tmp mysql sock  var lib mysql mysql sock    I use  tmp  as a default location for sockets

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If you are on a recent RHEL  you may need to start mariadb  an open source mysql db  instead of the mysql db   yum remove mysql yum -y install mariadb-server mariadb service mariadb start   You should then be able to access mysql in the usual fashion   mysql -u root -p

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Here s what worked for me   ln -s  var lib mysql mysql sock  tmp mysql sock service mysqld restart

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If your mysql was previously working and has stopped suddenly just  reboot  the server   Was facing this issue on my CentOS VPS -   Was constantly getting   Can t connect to local MySQL server through socket   var lib mysql mysql sock  2   Tried all techniques  finally restarting the server fixed the issues -   shutdown -r now  Hope this helps

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I had to disable explicit defaults for timestamp from my cnf

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MariaDB  a community developed fork of MySQL  has become the default implementation of MySQL in many distributions   So first you should start     sudo systemctl start mariadb   If this fails rather try     sudo systemctl start mysqld   Then to start mysql     mysql -u root -p     As of today  in Fedora the package is named mariadb And in Ubuntu it is called mariadb-server   So you may have to install it if its not already installed in your system

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My problem was that I installed mysql successfully and it worked fine   But one day  the same error occurred   Can t connect to local MySQL server through socket   var lib mysql mysql sock   2   And no mysql sock file existed   This sollution solved my problem and mysql was up and running again   Log in as root   sudo su -   Run   systemctl stop mysqld service systemctl start mysqld service systemctl enable mysqld service   Test as root   mysql -u root -p   mysql should now be up and running   I hope this can help someone else as well

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One way to reproduce this error   If you meant to connect to a foreign server but instead connect to the non existent local one    eric dev     mysql -u dev -p Enter password  ERROR 2002  HY000   Can t connect to local MySQL server through  socket   var lib mysql mysql sock   2  eric dev       So you have to specify the host like this   eric dev     mysql --host yourdb yourserver com -u dev -p Enter password  Welcome to the MySQL monitor   Commands end with   or  g  Your MySQL connection id is 235 Server version  5 6 19 MySQL Community Server  GPL   Type  help   or   h  for help  Type   c  to clear the current input statement   mysql gt  show databases   -------------------------    Database                   -------------------------    information schema          mysql                       performance schema         -------------------------  3 rows in set  0 00 sec   mysql gt  exit Bye eric dev

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Just edit  etc my cnf Add following lines to my cnf   mysqld   socket  var lib mysql mysql sock    client   socket  var lib mysql mysql sock   Restart mysql and connect again      mysql -u user -p password database -h host

[mysql] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

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