MySQL學習筆記

標籤：

背景：不熟悉Ubuntu也不熟悉MySQL，只有使用RHEL和Oracle的經驗。嘗試在Ubuntu上開始學習使用MySQL。

 關於Ubuntu與Redhat包管理的差異比較，見文章

首先確認是否已經安裝了MySQL，使用dpkg命令：

$ dpkg -l|grep -i mysqlii  libdbd-mysql-perl                   4.025-1                              amd64        Perl5 database interface to the MySQL databaseii  libmysqlclient18:amd64              5.5.49-0ubuntu0.14.04.1              amd64        MySQL database client libraryii  mysql-client-5.5                    5.5.49-0ubuntu0.14.04.1              amd64        MySQL database client binariesii  mysql-client-core-5.5               5.5.49-0ubuntu0.14.04.1              amd64        MySQL database core client binariesii  mysql-common                        5.5.49-0ubuntu0.14.04.1              all          MySQL database common files, e.g. /etc/mysql/my.cnfii  mysql-server                        5.5.49-0ubuntu0.14.04.1              all          MySQL database server (metapackage depending on the latest version)ii  mysql-server-5.5                    5.5.49-0ubuntu0.14.04.1              amd64        MySQL database server binaries and system database setupii  mysql-server-core-5.5               5.5.49-0ubuntu0.14.04.1              amd64        MySQL database server binariesii  php5-mysql                          5.5.9+dfsg-1ubuntu4.16               amd64        MySQL module for php5ii  python-mysqldb                      1.2.3-2ubuntu1                       amd64        Python interface to MySQL

然後確認MySQL是否已經運行：

$ pgrep mysqld8573

然後掃一眼設定檔，MySQL設定檔：/etc/mysql/my.cnf ，其中指定了資料檔案存放路徑。

哇，資訊量還是很大的，做為一個Oracle的DBA，看一眼這個發現有很多需要重視的地方，先別急。

$ cat /etc/mysql/my.cnf## The MySQL database server configuration file.## You can copy this to one of:# - "/etc/mysql/my.cnf" to set global options,# - "~/.my.cnf" to set user-specific options.# # One can use all long options that the program supports.# Run program with --help to get a list of available options and with# --print-defaults to see which it would actually understand and use.## For explanations see# http://dev.mysql.com/doc/mysql/en/server-system-variables.html# This will be passed to all mysql clients# It has been reported that passwords should be enclosed with ticks/quotes# escpecially if they contain "#" chars...# Remember to edit /etc/mysql/debian.cnf when changing the socket location.[client]port= 3306socket= /var/run/mysqld/mysqld.sock# Here is entries for some specific programs# The following values assume you have at least 32M ram# This was formally known as [safe_mysqld]. Both versions are currently parsed.[mysqld_safe]socket= /var/run/mysqld/mysqld.socknice= 0[mysqld]## * Basic Settings#user= mysqlpid-file= /var/run/mysqld/mysqld.pidsocket= /var/run/mysqld/mysqld.sockport= 3306basedir= /usrdatadir= /var/lib/mysqltmpdir= /tmplc-messages-dir= /usr/share/mysqlskip-external-locking## Instead of skip-networking the default is now to listen only on# localhost which is more compatible and is not less secure.bind-address= 0.0.0.0## * Fine Tuning#key_buffer= 16Mmax_allowed_packet= 16Mthread_stack= 192Kthread_cache_size       = 8# This replaces the startup script and checks MyISAM tables if needed# the first time they are touchedmyisam-recover         = BACKUP#max_connections        = 100#table_cache            = 64#thread_concurrency     = 10## * Query Cache Configuration#query_cache_limit= 1Mquery_cache_size        = 16M## * Logging and Replication## Both location gets rotated by the cronjob.# Be aware that this log type is a performance killer.# As of 5.1 you can enable the log at runtime!#general_log_file        = /var/log/mysql/mysql.log#general_log             = 1## Error log - should be very few entries.#log_error = /var/log/mysql/error.log## Here you can see queries with especially long duration#log_slow_queries= /var/log/mysql/mysql-slow.log#long_query_time = 2#log-queries-not-using-indexes## The following can be used as easy to replay backup logs or for replication.# note: if you are setting up a replication slave, see README.Debian about#       other settings you may need to change.#server-id= 1#log_bin= /var/log/mysql/mysql-bin.logexpire_logs_days= 10max_binlog_size         = 100M#binlog_do_db= include_database_name#binlog_ignore_db= include_database_name## * InnoDB## InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.# Read the manual for more InnoDB related options. There are many!## * Security Features## Read the manual, too, if you want chroot!# chroot = /var/lib/mysql/## For generating SSL certificates I recommend the OpenSSL GUI "tinyca".## ssl-ca=/etc/mysql/cacert.pem# ssl-cert=/etc/mysql/server-cert.pem# ssl-key=/etc/mysql/server-key.pem[mysqldump]quickquote-namesmax_allowed_packet= 16M[mysql]#no-auto-rehash# faster start of mysql but no tab completition[isamchk]key_buffer= 16M## * IMPORTANT: Additional settings that can override those from this file!#   The files must end with ‘.cnf‘, otherwise they‘ll be ignored.#!includedir /etc/mysql/conf.d/

先想辦法用mysql用戶端登入一下資料庫

 

MySQL學習筆記