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
