mysql 5.1.71升级到5.6.30mysqldump-h主机名 -P端口 -u用户名 -p密码 (–database) 数据库名 >文件名.sql

备份MySQL数据库的命令

mysqldump-hhostname -uusername -ppassword databasename >backupfile.sql

备份MySQL数据库为带删除表的格式，能够让该备份覆盖已有数据库而不需要手动删除原有数据库。

mysqldump-–add-drop-table -uusername -ppassword databasename >backupfile.sql

直接将MySQL数据库压缩备份

mysqldump-hhostname -uusername -ppassword databasename | gzip >backupfile.sql.gz

备份MySQL数据库某个(些)表

mysqldump-hhostname -uusername -ppassword databasename specific_table1 specific_table2 >backupfile.sql

同时备份多个MySQL数据库

mysqldump-hhostname -uusername -ppassword --databases databasename1 databasename2 databasename3 >multibackupfile.sql

仅仅备份数据库结构

mysqldump –-no-data --databases databasename1 databasename2 databasename3 >structurebackupfile.sql

备份服务器上所有数据库

mysqldump –all-databases >allbackupfile.sql

还原MySQL数据库的命令

mysql-hhostname -uusername -ppassword databasename

还原压缩的MySQL数据库

gunzip< backupfile.sql.gz | mysql -uusername -ppassword databasename

将数据库转移到新服务器

mysqldump-uusername -ppassword databasename | mysql –host=*.*.*.* -C databasename1、备份配置文件

[root@webmaildb01~]#cat /etc/my.cnf | egrep -v "^$|^#"

[mysqld]

skip-name-resolve

port= 3306skip-external-locking

query-cache-type = 1query-cache-size =64M

query_cache_limit=10M

thread_cache_size= 8innodb_file_per_table

ssl-cert = /etc/pki/tls/certs/iRedMail.crt

ssl-key = /etc/pki/tls/private/iRedMail.key

ssl-cipher =ALL

server-id = 1log_bin= /var/log/mysqld/mysql-bin.log

log-slave-updates

log-bin-index = /var/log/mysqld/mysqld-log-bin.index

log-error = /var/log/mysqld/error.log

relay-log = /var/log/mysqld/relay.log

relay-log-info-file = /var/log/mysqld/relay-log.info

relay-log-index = /var/log/mysqld/relay-log.index

auto_increment_increment= 10auto_increment_offset= 1binlog_do_db=amavisd

binlog_do_db=iredadmin

binlog_do_db=roundcubemail

binlog_do_db=vmail

binlog-ignore-db=test

binlog-ignore-db=information_schema

binlog-ignore-db=mysql

binlog-ignore-db=iredapd

binlog-ignore-db=sogo

binlog-ignore-db=test

log-slave-updates

replicate-ignore-db=test

replicate-ignore-db=information_schema

replicate-ignore-db=mysql

replicate-ignore-db=iredapd

[client]

default-character-set=utf8

[mysqld_safe]

log-error = /var/log/mysqld/mysqld.log##############################################################

[root@webmaildb02~]#cat /etc/my.cnf | egrep -v "^$|^#"

[mysqld]

port= 3306skip-external-locking

query-cache-type = 1query-cache-size =64M

query_cache_limit=10M

thread_cache_size= 8innodb_file_per_table

ssl-cert = /etc/pki/tls/certs/iRedMail.crt

ssl-key = /etc/pki/tls/private/iRedMail.key

ssl-cipher =ALL

skip-name-resolve

server-id = 2log_bin= /var/log/mysqld/mysqld-bin.log

log-slave-updates

log-bin-index = /var/log/mysqld/log-bin.index

log-error = /var/log/mysqld/error.log

relay-log = /var/log/mysqld/relay.log

relay-log-info-file = /var/log/mysqld/relay-log.info

relay-log-index = /var/log/mysqld/relay-log.index

auto_increment_increment= 10auto_increment_offset= 1binlog_do_db=amavisd

binlog_do_db=iredadmin

binlog_do_db=roundcubemail

binlog_do_db=vmail

binlog-ignore-db=test

binlog-ignore-db=information_schema

binlog-ignore-db=mysql

binlog-ignore-db=iredapd

binlog-ignore-db=sogo

log-slave-updates

replicate-ignore-db=test

replicate-ignore-db=information_schema

replicate-ignore-db=mysql

replicate-ignore-db=iredapd

[client]

default-character-set=utf8

[mysqld_safe]

log-error = /var/log/mysqld/mysqld.log2、关闭数据库，备份全部数据库,和部分数据库，表结构######################################################################

同时备份多个MySQL数据库

mysqldump-hhostname -uusername -ppassword –-databases databasename1 databasename2 databasename3 >multibackupfile.sql

仅仅备份数据库结构

mysqldump –-no-data –-databases databasename1 databasename2 databasename3 >structurebackupfile.sql

备份服务器上所有数据库

mysqldump-uroot -p密码 --all-databases >allbackupfile.sql

还原MySQL数据库的命令

mysql-hhostname -uusername -ppassword databasename

先备份全库

mysqldump-uroot -p密码 --all-databases >allbackupfile.sql

备份mysql,amavisd,iredadmin,iredapd,roundcubemail,vmail

mysqldump-uroot -p密码 --databases amavisd iredadmin iredapd roundcubemail vmail mysql >multibackupfile.sql

备份表结构

mysqldump-uroot -p密码 --no-data --databases amavisd iredadmin iredapd roundcubemail vmail mysql >structurebackupfile.sql2.1、删除/var/lib/mysql所有文件

删除/var/log/mysqld/下的所有的文件3、上传数据包

安装升级包，如果遇到冲突的包就卸载他,本次遇到的冲突包为mysql-libs4、还原数据库

SET PASSWORD= PASSWORD('密码');

还原MySQL数据库的命令

mysql-uroot -p密码

mysql> source /root/allbackupfile.sql