mysql误删root用户恢复方法
装完数据库清理一些默认账号的时候不小心把root删除了，flushprivileges之后的新root忘了grant任何权限，查看mysqld选项里面有个−−skip-grant-tables
#/usr/libexec/mysqld--verbos--help
mysql5.5手册说明如下
--skip-grant-tables
Thisoptioncausestheservertostartwithoutusingtheprivilegesystematall,whichgivesanyonewithaccesstotheserverunrestrictedaccesstoalldatabases.Youcancausearunningservertostartusingthegranttablesagainbyexecutingmysqladminflush-privilegesormysqladminreloadcommandfromasystemshell,orbyissuingaMySQLFLUSHPRIVILEGESstatementafterconnectingtotheserver.Thisoptionalsosuppressesloadingofplugins,user-definedfunctions(UDFs),andscheduledevents.Tocausepluginstobeloadedanyway,usethe--plugin-loadoption.
--skip-grant-tablesisunavailableifMySQLwasconfiguredwiththe--disable-grant-optionsoption.SeeSection2.10.2,“TypicalconfigureOptions”.
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