ERROR 2002 HY000 Can t connect to local MySQL server through socket var run mysqld mysqld sock 2

Question

I installed LAMP on Ubuntu nbsp 12 04 LTS  Precise Pangolin  and then set root password on phpMyAdmin  I forgot the password and now I am unable to login  When I try to change password through terminal I get      ERROR 2002  HY000   Can t connect to local MySQL server through socket      var run mysqld mysqld sock   2    How can I fix this  I am unable to open LAMP  uninstall it or reinstall it

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Simple solution on my server  After migrating to a new Debian 7 server with my MySQL databases  the second local IP address  127 0 1 1  was missing in my hosts file  Adding this resolved the warnings   echo -e   n127 0 1 1         hostname    gt  gt   etc hosts

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In my case it worked by doing some R amp D   I am able to connect to MySQL using  root-debian mysql -h 127 0 0 1 -u root -p   But it s not working with mysql -u root -p   I did not find any bind-address in my cnf  So I outcommented the parameter socket  var lib mysql mysqld sock in my cnf which was causing me a problem with login   After restarting the service it went fine   root debian    mysql -u root -p Enter password  Welcome to the MySQL monitor   Commands end with   or  g  Your MySQL connection id is 5 Server version  5 6 19 MySQL Community Server  GPL

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Instead of using localhost   mysql -u myuser -pmypassword -h localhost mydatabase   Use 127 0 0 1  mysql -u myuser -pmypassword -h 127 0 0 1 mydatabase    also note  no space between -p and mypassword   Enjoy

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I had to say     sudo  etc init d mysqld start

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In Ubuntu 18 10 Linode 1GB Ram  I experienced this error  After examining  var log mysql error log   I came across this    Note  InnoDB  innodb empty free list algorithm has been changed to legacy because of small buffer pool size  In order to use backoff  increase buffer pool at least up to 20MB   I upgraded my linode to 2GB and restarted mariadb with sudo mysql  Next mysql secure admin ran  but the root password did not set for the user-as ususl unitl changing the root user to use the mysql native password plugin  Not sure  but it appears that the sock was created  but the server shutdown due to the lack of memory in my VPS

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SOLUTION 1 Purge out  or remove if you want to keep databases  any mysql packages to repeat the installation anew   sudo apt purge  mysql     -Autoremove packages  sudo apt autoremove   -Stop the apparmor service  sudo systemctl stop apparmor   -Make apparmor drop its profiles  I thought with stop it was enough  but for me it wasn t  With systemctl it doesn t work   sudo service apparmor teardown   -Reinstall mysql-server  sudo apt install mysql-server   -Install apparmor-utils  to create a profile for mysql in apparmor that allows mysql to run  sudo apt install apparmor-utils   -Check the status of mysql-server  must be Active running    sudo systemctl status mysql   -Generate a profile for mysql in apparmor  sudo aa-genprof mysql   -In other terminal run mysql  enter root password   mysql -u root -p   -do things in MySQL while apparmor is generating the profile in the other terminal     mysql  CREATE DATABASE fooDB   -Swith to the other terminal and press  s   the prompt tells you it s for  scan    -Say yes to the policies from apparmor you see fit  I guess all of them for mysql   say yes pressing  a  for Allow  -Press  f  to Finish the apparmor profile  -Restart the apparmor service  sudo systemctl start apparmor   -Check to see if you still can use mysql in the other terminal     mysql exit   mysql -u root -p   If all is well you can use mysql from the command line

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This answer is related to updating to MySQL 5 6 on machines with a small amount of RAM  I had the same problem when upgrading from MySQL 5 5 to 5 6 on my Debian nbsp 8  Jessie   MySQL was not started  the status was showing active exited  and simply making service mysql start did not work  because as I found from the  var logs mysql error log log file   InnoDB  Initializing buffer pool  size   128 0M InnoDB  mmap 136019968 bytes  failed  errno 12 Cannot allocate memory for the buffer pool   The memory was not enough  I had only 256 MB of RAM   In MySQL there is a setting  performance schema  By default  it is turned off in MySQL 5 5   https   dev mysql com doc refman 5 5 en performance-schema-startup-configuration html  But in MySQL 5 6 the default is on  and simply by adding the following line in  etc mysql my cnf file and restarting  it worked   performance schema   off   Warning  Turning this setting off you might experience performance issues  but I guess in a development environment it won t be a problem   Also  here is an article that might be helpful configuring MySQL to use minimal memory  Configuring MySQL to use minimal memory

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I had the same problem  After much searching I didn t find any answer   At last  I checked the  tmp directory  and its permissions were 755  I changed its permissions to 777 and mysqld started well without any problem

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For me mysql wasn t running so I fixed it with sudo  etc init d mysql start

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I also facing same problem it will be occur if your mysql server is not running by default it will again stop after some sec so you again run    sudo service mysql start    command you can change if know   for that use command     sudo service mysql start       put user password if required because we use sudo      and then run    sudo mysql -u root -p           put user password if required     now you got your database

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I once had this problem and solved it by installing mysql-server  so make sure that you have installed the mysql-server  not the mysql-client or something else   That error means the file  var run mysqld mysqld sock doesn t exists  if you didn t install mysql-server  then the file would not exist  So in that case  install it with   sudo apt-get install mysql-server   But if the mysql-server is already installed and is running  then you need to check the config files   The config files are    etc my cnf  etc mysql my cnf  var lib mysql my cnf   In  etc my cnf  the socket file config may be  tmp mysql sock and in  etc mysql my cnf the socket file config may be  var run mysqld mysqld sock  So  remove or rename  etc mysql my cnf  let mysql use  etc my cnf  then the problem may solved

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In my case I was missing mysql-server  So after installing it via sudo apt-get install mysql-server I was able to connect again

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Uninstall completely MySQL sudo apt-get remove --purge mysql    reinstall it sudo apt install mysql-server mysql-client  test if it run sudo mysql  Install php drivers sudo apt install php7 4 php7 4-fpm php7 4-mysql php7 4-cgi php7 4-cli php7 4-common  Very nice

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I solved this by killing the mysql process   ps -ef   grep mysql kill  the id    And then I started the server again with   sudo  etc init d mysql restart   But start works as well   sudo  etc init d mysql start   Then I logged in as admin  and I was done

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If you have XAMPP installed on your Linux machine  try to copy your my cnf file from  opt lampp etc my cnf to  etc my cnf   Then  run the mysql -u root again    You should now have the correct socket and be able to run the MySQL client

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This error can also occur if you try to change the directory where the database is stored  but imput the wrong directory in the configuration file  like a typo in the second drive as D instead of the accurate D    Instead of telling you the typo directory does not exist  it will tell you that you lack permission to access it  leading you to try to change the permissions for the typo directory  which it will let you do   So if you get this error while changing directories  double check the configuration file and make sure you don t have a typo

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Just copy your  opt lampp etc my cnf file to  etc mysql my cnf   And in the terminal type   mysql -u root   You will be getting the mysql gt  prompt   mysql gt  Update mysql user set Password PASSWORD  your password   where user  root    mysql gt  FLUSH PRIVILEGES

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Check if you have the correct rights   sudo chmod 755  var lib mysql mysql   I had the same problems and this worked for me  After doing this I was able to start MySQL

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You are running locally  meaning that your client runs on the same machine as your server   Make sure that your Unix user can actually reach read  var run mysqld mysqld sock   ls -als  var ls -als  var run ls -als  var run mysqld ls -als  var run mysqld mysqld sock   If not  check with your system administrator or database administrator to provide adequate read execute access to those directories  or move the socket file elsewhere

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I had the same issue  Sometimes this happens if your MySQL service is turned down   So you have to start it   sudo service mysql start

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To prevent the problem from occurring  you must perform a graceful shutdown of the server from the command line rather than powering off the server   shutdown -h now   This will stop the running services before powering down the machine   Based on Centos  an additional method for getting it back up again when you run into this problem is to move mysql sock   mv  var lib mysql mysql sock  var lib mysql mysql sock bak  service mysqld start   Restarting the service creates a new entry called mqsql sock

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I was having this problem too and neither of these answers helped me  The issue was different  but the error was the described by the OP   I check the logs of MySQL in  var log mysql  and I saw this   150309  5 03 19  ERROR   usr sbin mysqld  unknown variable    lower case tables names 1    I opened the  etc mysql my cnf file and outcommented that line    After doing that  I was able to connect to the database   Honestly I don t know what the problem was  The linode server was scheduled to restart due to maintenance  and this error came out of nowhere

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Check the  bind-adress  parameter in my cnf   Else try with the command   mysql -h 127 0 0 1 -P 3306 -u root -p    -h for host 127 0 0 1  that is  localhost -P  notice -P as uppercase  for port 3306  that is  the default port for MySQL

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For me an update solved the problem   On Ubuntu   sudo apt-get update sudo apt-get upgrade   On CentOS     sudo yum update

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I just experienced the same issue after I had to restart my production server  I am running Debian nbsp 8 1  Jessie  on a DigitalOcean droplet   This is what I did to resolve my issue    Check if the file  var run mysqld mysqld sock exists  If it doesn t  manually create it by entering touch  var run mysqld mysqld sock  which is what I had to do   So the MySQL process can use this file  Change ownership of said file by entering chown mysql  var run mysqld mysqld sock  Once  2  has been done  restart the MySQL service by entering service mysql restart or  etc init d mysql restart    After going through the above steps  my issue was solved  I rarely have this issue  and there is probably a better way  so by all means provide constructive feedback if need be

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By experience I say that you need to check if the server is running first and then try configuring MySQL  The last solution is to re-install MySQL

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In my case  I m not able to access mysql and after 3 days research  I have got a solution  This is perfect solution because I have searched  var run mysqld mysqld sock and I did not find the folder  You can run on putty the commands listed below  sudo mkdir  var run mysqld  sudo chown -R mysql mysql  var log mysql sudo mysqld --basedir  usr --datadir  var lib mysql --user mysql --socket  var run mysqld mysqld sock sudo  etc init d mysql restart  You will save your valuable time

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This answer is likely to drown here  but maybe somebody stumbles upon it accidentally   In my case  SELinux prevented the user application from connecting to the MySQL  MariaDB  server socket  On RHEL  check  var log audit audit log if you have SELinux enabled

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Did you check if LAMPP is running   sudo bash  lt path gt  lampp start   For me  path is  sudo bash  opt lampp lampp start

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i solved this problem with restart mysql   etc init d mysql stop  and   etc init d mysql start  that s it

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In my case  It seems like I wasnt really able to kill the mysql process  when I run   sudo service mysql stop ps -ef   grep mysql   The mysql process was always there  it looks like it was blocking the socket file and new mysql process wasnt able to create it itself   so this helped  cd  var run sudo cp mysqld  mysqld bc -rf sudo chown mysql mysql mysqld bc  sudo service mysql stop sudo cp mysqld bc  mysqld -rf sudo chown mysql mysql mysqld -R sudo  usr sbin mysqld --skip-grant-tables --skip-networking  amp    Now Im able to log in database using  mysql -u root   Then to update root password   UPDATE user SET authentication string password  YOURPASSWORDHERE   WHERE user  root   FLUSH PRIVILEGES    PS  I had trouble updating root passwod  seems like problem with  auth socket  plugin  so I had to create new user with full privileges  insert into user set  Host     localhost    User     super    plugin     mysql native password    authentication string    NULL   password expired     N    password lifetime    NULL   account locked     N    Select priv     Y    Insert priv     Y    Update priv     Y    Delete priv     Y    Create priv     Y    Drop priv     Y    Reload priv     Y    Shutdown priv     Y    Process priv     Y    File priv     Y    Grant priv     Y     References priv     Y    Index priv     Y    Alter priv     Y    Show db priv     Y    Super priv     Y    Create tmp table priv     Y    Lock tables priv     Y    Execute priv     Y    Repl slave priv     Y     Repl client priv     Y     Create view priv     Y    Show view priv     Y    Create routine priv     Y    Alter routine priv     Y    Create user priv     Y     Event priv     Y    Trigger priv     Y    Create tablespace priv     Y     This creates user  super  with no password and then you can connect with mysql -u super

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I think whenever you get the error     ERROR 2002  HY000   Can t connect to local MySQL server through socket   var lib mysql mysql sock    I will recommend first to check whether your mysql daemon is running    Most of the time it will not running by default  You can check it by  etc init d mysqld status   If it s not running then start it first       etc init d mysqld start    I bet it will 110  work

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Installing mysql-server solved the issue  sudo apt-get install mysql-server

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mysqld stop mysql server start

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Your mysql-server might not be running  Ensure it runs by typing mysql server start into the terminal

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I had this on Ubuntu and as I ve figured out  there was more than one instance of mysqld    It looked like the previous one had not been completely stopped  while the new one has already started  Running   etc init d mysql stop  didn t help  it was always returning  OK  and a new instance has been launched automatically immediately after that             sudo  etc init d mysql stop            Stopping MySQL database server mysqld          OK              pgrep mysql         28315           sudo  etc init d mysql stop            Stopping MySQL database server mysqld          OK              pgrep mysql         28570           sudo  etc init d mysql stop            Stopping MySQL database server mysqld          OK              pgrep mysql         28763               etc       Fortunately  the following command has fixed the problem         sudo service mysql stop     mysql stop waiting        ps -ef   grep mysql     29841 26858  0 10 59 pts 8    00 00 00 grep --color auto mysql  lt --- IT s gone      After that I was able to start mysql again and see that mysql sock has been successfully created

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I solved this problem by removing this line from my  etc mysql my conf in the mysqld section   mysqld     default-character-set utf8   Restart and it works fine

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You are missing permission to create  var run mysqld directory So please create and  give permission as following    mkdir -p  var run mysqld chown mysql mysql  var run mysqld

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I FOUND THE SOLUTION  Before firing the command   mysql secure installation   Step 1  sudo systemctl stop mariadb  Step 2  sudo systemctl start mariadb Step 3  mysql secure installation   Then it will ask root password and you can simply press Enter and set your new root password

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For CentOS Linux release 7 3 The mysql sock file path is  var lib mysql mysql sock Edit  etc my cnf file and put below entry This will solve your problem    client  user root password Passw0rd port 3306 socket  var lib mysql mysql sock  mysqld  bind-address 0 0 0 0   After this restart the service   service mysql restart

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Make sure you have backups of important databases and then try uninstall MySQL related stuff   apt-get remove --purge mysql     Then install it again   apt-get install mysql-server mysql-client   This worked for me and data was kept   If PHP MySQL shows errors you might have to reinstall PHP MySQL   apt-get install php5-fpm php5-mysql

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I my case it was just because mysql was stopped because of the missing  var log mysql folder defined in  etc mysql my cnf  After creating it I could start mysql and it ran as usual

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It may be an issue with the configuration file  I had a similar problem  and I couldn t find a solution on the web  I noticed that I had two my cnf files  one in  etc mysql and the other in  etc  Follow the steps below    Check for my cnf files on your computer using locate my cnf  If there are two entries  i e   etc my cnf and  etc mysql my cnf  rename  etc mysql my cnf to something else  e g  etc mysql my cnf old   Try to run MySQL again

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I fixed this problem by executing the following command    mysql server start   And if you are on a mac and used brew to install mysql  simply use     brew services start mysql

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Install mysql-server   sudo apt-get install mysql-server enter password as root   Login   mysql -u root -p root   Here -u user name and -p password was given while installing MySQL server  It will work as it has worked for me

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In my case  the problem was page corruption in all my databases  check the mysql error log    I solved it with Forcing InnoDB Recovery  The trick is editing  etc mysql my cnf and adding  innodb force recovery   4   just below   mysqld    And then restart mysql  After checking everything works correctly now  remove the line back again

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For me it was   Open  etc mysql my cnf or  etc my cnf and search for  bind-address   It was 127 0 0 1  I converted it to localhost  so the line result should be  bind-address   localhost    Otherwise  you should run the your MySQL server with an IP address that existed in the bind-address directive  i e  mysql -h 127 0 0 1

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In  etc mysql my cnf  check the last line be    includedir  etc mysql conf d

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sudo touch  var lib mysql  force upgrade sudo rcmysql restart   worked for me when I had this issue

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It seems your MYSQL is stopped  use below command to start MySQL again sudo service mysql start

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On Debian server Jessie  my working solution was to simply do  service mysql restart service mysql reload   as root user

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In my case  i had files corrupted in my folder of mysql data      mv  var lib mysql  var lib mysql old   so as i had a backup  i moved the directory to   old   and started the docker again  it created a new folder mysql with clean data  and the socket worked

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Try this   mysql -h 127 0 0 1 -P 3306 -u root -p  lt database gt    Also  to see if it s running    telnet 127 0 0 1 3306    Probably it is just a misconfiguration in the my cnf file  in  etc somewhere  depending on the Linux distribution

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Open the terminal and type   sudo apt-get purge mysql-client-core-5 6  sudo apt-get autoremove  sudo apt-get autoclean  sudo apt-get install mysql-client-core-5 5  sudo apt-get install mysql-server     Both MySQL database core client and MySQL Server packages will be the same version 5 5  MySQL Client 5 5 and MySQL Server 5 5 are the current  best  versions of these packages in Ubuntu 14 04 as determined by the package maintainers    If you would rather install MySQL Client 5 6 and MySQL Server 5 6 you can also find the mysql-client-core-5 6 and mysql-server-5 6 packages in the Ubuntu Software Center  The important thing is that the client and server version numbers match in either case   This worked for me

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Also check your my conf   etc mysql my cnf  and see if bind-address is set to 127 0 0 1   If not  this might cause this issue

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I am seeing all these answers  but none offer the option to reset the password and no accepted answer  The actual question being he forgot his password  so he needs to reset  not see if it s running or not  installed or not  as most of these answers imply   To reset the password Follow these steps  can be helpful if you really forget your password and you can try it anytime  even if you re not in the situation at the moment    Stop mysql sudo  etc init d mysql stop  Or for other distribution versions  sudo  etc init d mysqld stop   Start MySQL in safe mode sudo mysqld safe --skip-grant-tables  amp    Log into MySQL using root mysql -u root   Select the MySQL database to use use mysql    Reset the password -- MySQL version  lt  5 7 update user set password PASSWORD  quot mynewpassword quot   where User  root    -- MySQL 5 7  mysql user table  quot password quot  field - gt   quot authentication string quot   update user set authentication string password  mynewpassword   where user  root     Flush the privileges flush privileges    Restart the server quit   Stop and start the server again Ubuntu and Debian  sudo  etc init d mysql stop     sudo  etc init d mysql start    On CentOS  Fedora  and RHEL      sudo  etc init d mysqld stop             sudo  etc init d mysqld start   Login with a new password mysql -u root -p   Type the new password and enjoy your server again like nothing happened   This was taken from Reset a MySQL root password

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Somehow the MySQL server process did not create the socket  or the client is looking for the socket in the wrong place   My first suggestion would be to check if the MySQL server is running  Second suggestion might be  is the MySQL server running on another host  If so  add the -h  lt hostname gt  flag to your MySQL client in the terminal   If MySQL is indeed running  and running locally  check your my cnf file  There should be a line like  socket    var run mysqld mysqld sock   See if that matches the socket location that you mentioned in your post    From experience  I would say the most likely scenario is your MySQL server either is not running at all or is not running on the same host as where you run your MySQL client from the terminal

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If you re using Amazon EC2  and you re having this problem on the instance  then you only need to do   sudo yum install mysql-server sudo service mysqld restart   Amazon EC2 doesn t have a server installed  only the client is installed   so in case of that you need to install that on your instance  and after that try   mysql -u root -p   to check if that worked

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In my case  the default port 3306 was being used by some other process and thus it was not starting  After I stopped the other service and did sudo service mysql start  it worked fine  BTW  you can use something like sudo lsof -Pn -iTCP 3306 to see who may be using the port

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I had a similar problem   mysql wouldn t start   sudo service mysql start start  Job failed to start   If I disabled apparmor   sudo aa-complain  etc apparmor d     the problem went away   The issue was that mysqld was trying to access  run mysqld mysqld sock but the apparmor profile only gave permission to  var run mysqld mysqld sock   var run is symlinked to  run  so these are actually the same    Not sure why mysqld isn t using the var path since that s what s set in all the configuration files  but you can fix the problem by adding the following to  etc apparmor d usr sbin mysqld   run mysqld mysqld pid rw   run mysqld mysqld sock rw

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I tried the following steps    Log in as super user or use sudo Open  etc mysql my cnf using gedit Find bind-address  and change its value to the database server host machine s IP address  For me  it was localhost or 127 0 0 1 Save and close the file  Come back to terminal and execute sudo service mysql start   And it worked for me

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An advice  Always ask MySQL what the problem is  In my case  less  var log mysql error log and see this   2015-07-28 12 01 48 23224  ERROR   usr sbin mysqld  unknown variable  log slow queries  var log mysql mysql-slow log  2015-07-28 12 01 48 23224  ERROR  Aborting   It is complaining  because I uncommented this option in my cnf  but after commenting this option  it started without any problem

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In my case it was that the disk was full and mysqld couldn t start anymore   Try to restart mysql service    gt  service mysql restart   or   gt  service mysql stop   gt  service mysql start   If it doesn t recognize stop command then it s definitely the disk space  You should make some space in the partition mysql is allocated or make the disk larger   Check the disk space with   gt  df -h

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I can t explain it  but in kubuntu 12 04 2 after     sudo apt-get autoremove linux-headers-3 2 0-37 linux-headers-3 2 0-37-generic   it started to work

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If you re using Ubuntu  it could be a matter of privileges   Check your directory privileges  It s not enough to be in the root group  also use a chmod on directories which MySQL writes  for example   var run mysqld  for the creation of the mysqld pid file    This was helpful for me

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Another cause of this issue  surprisingly  is the deletion of the folder  var log mariadb This was my case after i deleted this log folder  After the creation  the error disappeared

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It works now     I have followed the tutorial Installing MariaDB 10 1 16 on Mac OS X with Homebrew to overcome this issue   But don t forget to kill or uninstall the old installation of MariaDB

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I had the same issue  I found this   ERROR 2002  HY000   Can   t connect to local MySQL server through socket     var lib mysql mysql sock      This is because you are not running the mysqld daemon before launching the MySQL client  The file  var lib mysql mysql sock will be automatically created upon running the first instance of MySQL   To fix   First start the MySQL daemon  then type mysql    etc init d mysqld start mysql   Changing MySQL Root Password  By default  the root password is empty for the MySQL database  It is a good idea to change the MySQL root password to a new one from a security point of view   mysql gt  USE mysql  mysql gt  UPDATE user SET Password PASSWORD  newpassword   WHERE user  root   mysql gt  FLUSH PRIVILEGES    Once done  check by logging in   mysql -u root -p Enter Password   lt your new password gt

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My server storage was full  this was preventing Mysql from starting  Got the idea from here  Increasing the HD and rebooting fixed the issue

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The same on Ubuntu 14 04  Trusty Tahr    If you have installed XAMPP  installing mysql-server isn t the solution  because you ll access another MySQL   You have to use the right socket to access  Usually it is this    opt lampp var mysql mysql sock   Instead  change it to    var run mysqld mysqld sock

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You could first check whether the service is running  with   ps ax   grep mysql   I got this response   6104 pts 0    S      0 00  bin sh  usr bin mysqld safe 6431 pts 0    Sl     0 01  usr sbin mysqld --basedir  usr --datadir  var lib mysql --plugin-dir  usr lib mysql plugin --user mysql --pid-file  var run mysqld m   No response means the service isn t running  so do   service  mysql start

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If your installation was recent  you should to confirm if your installation is the installation SERVER    as mysql-server-5 5   Maybe you installed only  mysql     this is only client instead of the server

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Here s what worked for me   ln -s  var lib mysql mysql sock  tmp mysql sock service mysql restart   This creates a link

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I just had this problem now and solved it     Although you installed mysql-server  the daemon needs to be running in order for the client to connect to it     First check to see if mysql server is running    netstat -tap   grep mysql   You should see something like this      sudo netstat -tap   grep mysql tcp        0      0 localhost mysql                      LISTEN     6639 mysqld        If you don t have the server running  start the daemon by the following command    etc init d mysql restart   This should solve your problem if it s installed

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I got this problem too  but I just did   sudo service mysql restart    It worked for me

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I got exactely the same error when I have stopped mysql service  and here how to solve it  by  re starting mysql using these commands   sudo systemctl start mysql   or  sudo systemctl restart mysql

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Try restarting the server with  sudo  usr local mysql support-files mysql server start   If there is any error then follow the below steps   mysqld   You will see the the below log  Notice the highlighted portion of the MySQL directory here     mysqld  Can t change dir to     usr local mysql-5 7 14-osx10 11-x86 64 data    Errcode  13 - Permission denied  2016-10-04T14 09 19 392581Z 0  Warning  TIMESTAMP   with implicit DEFAULT value is deprecated  Please use   --explicit defaults for timestamp server option  see documentation for more details   2016-10-04T14 09 19 392847Z 0  Warning  Insecure   configuration for --secure-file-priv  Current value does not restrict   location of generated files  Consider setting it to a valid  non-empty   path  2016-10-04T14 09 19 392921Z 0  Note  mysqld  mysqld 5 7 14    starting as process 1402     2016-10-04T14 09 19 397569Z 0  Warning    Can t create test file     usr local mysql-5 7 14-osx10 11-x86 64 data Sudharshan lower-test    2016-10-04T14 09 19 397597Z 0  Warning  Can t create test file    usr local mysql-5 7 14-osx10 11-x86 64 data Sudharshan lower-test    2016-10-04T14 09 19 397712Z 0  ERROR  failed to set datadir to    usr local mysql-5 7 14-osx10 11-x86 64 data     2016-10-04T14 09 19 397776Z 0  ERROR  Aborting      2016-10-04T14 09 19 397795Z 0  Note  Binlog end    2016-10-04T14 09 19 397925Z 0  Note  mysqld  Shutdown complete    sudo chown -R  mysql  mysql  usr local mysql-5 7 14-osx10 11-x86 64   Note the MySQL folder path  usr local on the the previous log  and in my case it was mysql-5 7 14-osx10 11-x86 64  and you have to update it based on the log you get on your machine to provide read access to the MySQL directory   sudo  usr local mysql support-files mysql server start      Starting MySQL    SUCCESS

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You should verify the owner of the group for  var run mysqld  If it isn t mysql mysql  then do   su root chown mysql mysql  var run mysqld

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Upgrading MySQL fixed it for me   On RHEL-based servers  just run   sudo yum upgrade mysql-server

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

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