Steps To Fix Problems Reinstalling Linux MySQL

 

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    You should check these fix methods if you get mysql error when reinstalling Linux.

     

     

    MySQL

    My database is corrupted. I want to remove old mysql servers as a way. How do I reinstall the MySQL version 5 database server from Linux or Unix operating systems? The progress of the software broke my system. How do I uninstall and reinstall mysql to revert to the latest full MySQL version?

    Instruction Details
    Difficulty level Medium
    Root rights Yes
    Requirements No
    Approx. Time 20 minutes

    You can easily reinstall MySQL server on Linux or Unix operating system. The steps are as follows:

    1. Back up and toclient of all configuration files.
    2. Uninstall / remove the existing MySQL server / client.
    3. Completely remove the data directory from the files.
    4. Remove all MySQL configuration files.
    5. Reinstall MySQL server from scratch.
    6. Restore configuration files and database.

    Step 1. Backup-backup-backup

    Backup. The importance of pre-backing up your system cannot be overemphasized. You need to make a database backup

    1. MySQL data web directory (for example, / var / lib / mysql / .
    2. MySQL databases using the mysqldump command.
    3. MySQL configuration data /etc/my.cnf, /etc/logrotate.d/mysqld and other files.
    4. Mysql signal files (for example, /var/log/mysqld.log .

    For example, it seems to me that I have backups of all important files on a CentOS / RHEL 6.x based server:
    # mkdir / root / mysql-files /
    # black / root / mysql-files / mysql zcvf.config-files.dd-mm-yyyy.tar.gz /etc/logrotate.d/mysqld /var/log/mysqld.log /etc/my.cnf / root / my.cnf / var / lib / mysql /

    In this example, I am backing up all the details using the mysql-backup.sh shell script:

     Dump ...... cyberciti blog mysql ... Made in / root / mysql-files / 12.08.2013. 

    -rw-r – r–. 1 main reason 1836687 Dec 8 04:00 mysql-blog 08-12-2013-04: 00: 18.gz-rw-r -r–. some root 7152648 Dec 8 04:00 mysql-cyberciti.08-12-2013-04: 00:25.gz-rw-r -r–. 1 trunk currently 135530 Dec 8 04:00 mysql-mysql.08-12-2013-04: 00: 41.gz

    I recommend that you read our previous sentences “HowTo: Migrating / Moving MySQL Database and Users to a New Server” for more information.

    Step 2: Remove / Uninstall MySQL Server

    How do I reinstall mysql on Linux?

    Backing up the database and all configuration files.Uninstall / remove the available MySQL server / client.Delete all materials catalog files.Delete all MySQL configuration files.Reinstall the MySQL database server completely.Restore the configuration files and database.

    If you are using Debian / Ubuntu Linux, enter the following apt-get command:
    $ sudo apt-get purge mysql-server mysql-common mysql-client
    Examples of results:

     Reading Lists ... DoneCreate dependency treeGovernment documents are read ... DoneThe mysql-client package is not installed, so it is undoubtedly removedThe following packages were also installed automatically and are no longer needed:  libnet-daemon-perl libterm-readkey-perl libdbi-perl mysql-server-core-5.5, mysql-client-core-5.5  libplrpc-perlUse apt-get autoremove to remove them.The following packages will be REMOVED:  libdbd-mysql-perl * mysql-client-5 libmysqlclient18 * .5 * shared mysql * mysql server *  mysql-5.5 server *0 updated, 0 reinstalled, personal loans y are removed and 2 are not updated.After some operation, 67.3 MB of free space will open.... I want to continue. [We] ? .y(Reading .database .... 82128 files and directories are installed during this time.)Remove MySQL Server ...Remove mysql-server-5.5 ...stop mysql / waitClearing data configuration for mysql-server-5.5 ...Remove mysql-client-5.5 ...remove libdbd-mysql-perl ...Removing libmysqlclient18 ...Remove libmysqlclient18 config files via ...Removing MySQL-Common ...Clean up common mysql config files for ...dpkg: Warning: Removing mysql-common does not remove the non-empty list '/ etc / mysql'.Handling triggers for working with man-db ...Advance Treatment Trigger ...Process activators for libc-bin ...ldconfig lazy processing now changes place 

    Remove config / database / log files using rm command:
    $ sudo rm -rvfi / var / lib / mysql / etc / mysql / / var / log / mysql *

    If you are using CentOS / RHEL / Fedora / Red Hat / Scientific Linux, enter yum command to uninstall mysql:
    # yum mysql remove mysql server
    Examples of results:

    Remove config / database / log files using rm command:
    # rm -rfvi /etc/my.cnf / var / lib / mysql / / var / log / mysqld.log

    Step 3. Reinstall MySQL Database Server

    linux reinstall mysql

    If you want to use CentOS / RHEL / Fedora / Red Hat / Scientific Linux, enter right after the yum command to install mysql:
    # yum use mysql mysql-server

    If you are using Debian / Ubuntu Linux, enter the following apt-get command:
    $ sudo apt-get mysql-client add mysql-server mysql-common

    Recovery Step # 4: Configuring Programs And Databases

    Restore all configuration files and additional databases as described in step 1. See How to restore a MySQL database backup:
    $ gunzip mysql-blog 08-12-2013-04: 00: 18.gz
    $ mysql -u major Mysql -p -e 'CREATE DATABASE blog;'
    $ mysql -u root -p blog
    Restore the MySQL configuration file as follows:
    # tar / root / mysql-files / mysql xvf.config-files.dd-mm-yyyy.tar.gz -C / root / backups /
    # cp /root/backups/etc/my.cnf / etc
    # Support for restarting mysqld

    ADVERTISING

     #! / bin / sh# mysql-backup.sh: Displays MySQL databases.# Note. Test on RHEL / CentOS / Debian / Ubuntu Linux only.# Author: nixCraft  Under GPL v2.0 +# ------------------------------------------------- - ----NOW = $ (date + "% j-% m-% A")BAK = "/ root / mysql-files / $ NOW"A####################### WRITE ME FIRST #######################MUSER = "root"MPASS = "YOUR-ROOT-PASSWORD-HERE"MHOST = "local host"AMYSQL = "$ (which is MySQL)"MYSQLDUMP = "$ (which is mysqldump)"Gzip = "$ (which is gzip)"Aif [ ! -d $ BAK Then ]; mkdir -significant $ BAKanother :FiADBS = "$ ($ MYSQL -u $ MUSER -h $ MHOST -p $ MPASS -Bse 'Show databases')"echo -n "Reset ... $ THISDB ... Db"for $ DBSmake echo -n "$ db" FILE = $ BAK / mysql- $ db. $ NOW - $ (date + "% T"). Gz $ MYSQLDUMP $ MUSER -u -h $ MHOST -p $ MPASS $ db | $ GZIP -9> $ FILEdidecho -n "... done @ $ BAK directory."echo "" 
     Downloaded plugins: rhnplugin, product id, security, subscription managerThis system is not designed to manage Red Hat subscriptions. Can you really use a subscription manager to sign up?This system accepts messages from RHN Classic or RHN Satellite.Customize the removal processAllow dependencies-> Execute parcel receipt transaction---> mysql.x86_64 0: package 5.1.71-1.el6 removed---> mysql-server.x86_64 0: 5.1.71.el6 removed-> Permissionaddiction completedASolved dependenciesA================================================== = = ================================================ == Arch package version repository size================================================== = = ================================================ ==Removed: mysql x86_64 5.1.71-1.el6 @ rhel-x86_64-server-6 2.4M mysql server x86_64 5.1.71-1.el6 @ rhel-x86_64-server-6 25MATransaction summary================================================== = = ================================================ ==Remove 2 packagesASet brightness: 27 Kmeverything is fine [yes / no]: yesDownload packages:Run rpm_check_debugRun a transaction testSuccessful transaction verificationOperation in progress  Delete: mysql-server-5.1.71-1.el6.x86_64 1/2  Remove * mysql-5.1.71-1.el6.x86_64 2/2  Check: mysql-server-5.1.71-1.el6.x86_64 1/2  Check: mysql-5.1.71-1.el6.x86_64 2/2AREMOVED:  mysql.x86_64 0: 5.1.71-1.el6 mysql-server.x86_64 0: 5.1.71-1.el6AMade ! 

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    How uninstall and reinstall mysql Linux?

    First, remove the already installed mysql server with - sudo apt-get remove --remove mysql-server mysql-client mysql-common.Then clear all types of fa Sudo apt-get autoremove.Then install mysql-server - sudo apt-get fix -f mysql-server.Start the MySQL server - sudo systemctl starts mysql.

    How do I reinstall mysql without losing data?

    Copy the database first, for example with just mysqldump.Now run sudo apt-get purge mysql-server mysql-server-5.7 -Reinstall mysql with sudo apt-get. You can install mysql-server mysql-server-5.7.Start the MySQL database.

     

     

     

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