Fatal error Can t open and lock privilege tables Table mysql host doesn t exist

Question

I am on a server that has  afresh install on RHEL 5   I was able to install Apache and PHP just fine   but I am having serious trouble with my MySQL installation   I tried the following   yum install mysql-server mysql    And didn t get any errors or conflicts   Then I tried to start mysql with the following commands   chkconfig --levels 235 mysqld on service mysqld start   And get Timeout error occurred trying to start MySQL Daemon     I checked my logs and see this error    ERROR  Fatal error  Can t open and lock privilege tables  Table  mysql host  doesn t exist   I m not sure where to go from here   For reference I am using RHEL 5 and installed the latest versions of PHP 5 and Apache

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Just this command is enough to do the magic on centos 6 6   mysql install db

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I got similar error on overlayfs  overlay2  that is the default on Docker for Mac  The error happens when starting mysql on the image  after creating a image with mysql   2017-11-15T06 44 22 141481Z 0  ERROR  Fatal error  Can t open and lock privilege tables  Table storage engine for  user  doesn t have this option   Switching to  aufs  solved the issue   On Docker for Mac  the  daemon json  can be edited by choosing  Preferences     menu  and selecting  Daemon  tab  and selecting  Advanced  tab     etc docker daemon json         storage-driver     aufs      debug    true     experimental    true     Ref   https   github com moby moby issues 35503  https   qiita com Hige-Moja items 7b1208f16997e2aa9028

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My case on Ubuntu 14 04 2 LTS was similar to others with my cnf  but for me the cause was a    my cnf that was leftover from a previous installation  After deleting that file and purging re-installing mysql-server  it worked fine

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Uninstall mysql using yum remove mysql  Recursively delete  usr bin mysql and  var lib mysql  Delete the file  etc my cnf rmp Use ps -e to check the processes to make sure mysql isn t still running  Reboot server with reboot Run yum install mysql-server   This also seems to install the mysql client as a dependency  Give mysql ownership and group priveleges with   chown -R mysql  var lib mysql  chgrp -R mysql  var lib mysql Use service mysqld start to start MySQL Daemon

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If you move your datadir  you not only need to give the new datadir permissions  but you need to ensure all parent directories have permission   I moved my datadir to a hard drive  mounted in Ubuntu as    media  user  Data    and my datadir was Databases   I had to set permissions to 771 to each of the media  user and Data directories   sudo chmod 771  DIR    If this does not work  another way you can get mysql to work is to change user in  etc mysql my cnf to root  though there are no doubt some issues with doing that from a security perspective

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For myself  I had to do   yum remove mysql   rm -rf  var lib mysql  cp  etc my cnf   my cnf bkup  yum install -y mysql-server mysql-client  mysql install db  chown -R mysql mysql  var lib mysql chown -R mysql mysql  var log mysql  service mysql start   Then I was able to get back into my databases and configure them again after I nuked them the first go around

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After chown and chgrp ing  var lib mysql per the answer by  Bad Programmer  you may also have to execute the following command   sudo mysql install db --user mysql --ldata  var lib mysql   Then restart your mysqld

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I just met the same problem with mysql 5 7 on OSX   rm -rf  datadir  mysqld --initialize --datadir  datadir  mysqld --datadir  datadir

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I had the same issue in trying to start the server and followed the  checked  solution  But still had the problem   The issue was the my  etc my cnf file was not pointing to my designated datadir as defined when I executed the mysql install db with --datadir defined   Once I updated this  the server started correctly

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In Windows run the following commands in the command prompt as adminstrator Step 1  mysql install db exe  Step 2  mysqld --initialize  Step 3  mysqld --console  Step 4  In windows  Step 4  mysqladmin -u root password  quot XXXXXXX quot   Step 5  mysql -u root -p

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I had this issue on arch linux as well  The issue was pacman installed the package in a different location than MySQL was expecting  I was able to fix the issue with this   sudo mysql install db --user mysql --basedir  usr  --ldata  var lib mysql    Hope this helps someone

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On CentOS EL 6 and perhaps on earlier versions there is one way to get into this same mess   Install CentOS EL6 with a minimal installation  For example I used kickstart to install the following    packages  core acpid bison cmake dhcp-common flex gcc gcc-c   git libaio-devel make man ncurses-devel perl ntp ntpdate pciutils tar tcpdump wget  end   You will find that one of the dependencies of the above list is mysql-libs  I found that my system has a default my cnf in  etc and this contains    mysqld  dataddir  var lib mysql socket  var lib mysql mysql sock user mysql   Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links 0   mysqld safe  log-error  var log mysqld log pid-file  var run mysqld mysqld pid   When you build from the Generic Linux  Architecture Independent   Compressed TAR Archive your default data directory is  usr local mysql data which conflicts with the  etc my cnf already present which defines datadir  var lib mysql  Also the pid-file defined in the same file does not have permissions for the mysql user group to write to it in  var run mysqld    A quick remedy is to mv  etc my cnf  etc my cnf old which should get your generic source procedure working    Of course the experience is different of you use the source RPMs

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When download mysql zip version  if run mysqld directly  you ll get this error   2016-02-18T07 23 48 318481Z 0  ERROR  Fatal error  Can t open and lock privilege tables  Table  mysql user  doesn t exist 2016-02-18T07 23 48 319482Z 0  ERROR  Aborting  You have to run below command first   mysqld --initialize  Make sure your data folder is empty before this command

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mysql install db    -user mysql --ldata  var lib mysql   Worked for me in Centos 7

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initialize mysql before start on windows   mysqld --initialize

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The root of my problem seemed to be selinux  which was turned on  enforcing  automatically on OS install   I wanted my mysql in  data   After verifying that my cnf had   datadir  data mysql    and leaving the socket at  var lib mysql   I executed the command to turn off selinux for mysqld   alternative is to turn it off completely    setsebool -P mysqld disable trans 1   I ran the following commands    gt  chown -R mysql    gt  chgrp -R mysql    gt  mysql install db --user mysql   I started the mysql daemon and everything worked fine after that

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If you have a server which used to happily run MySQL  but now gives this error  then an uninstall and re-install of MySQL is overkill   In my case  the server died and took a few disk blocks with it  This affected a few files  including  var lib mysql mysql host frm and  var lib mysql mysql proc frm  Luckily  I could copy these from another server  and this got me past that table error

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In my case the path of MySQL data folder had a special character      and it make me get        Fatal error  Can t open and lock privilege tables  Table  mysql host    doesn t exist    I m have removed all special characters and everything works

[mysql] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist

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