MySQL啟動時必需到usr/local/mysql目錄的問題解決方法
阿新 • • 發佈：2018-08-09
set pid director med mat 需要 develop example create 之前我安裝MySql數據庫的時候，由於我的MySQL不是安裝在標準的/usr/local/mysql目錄，而是安裝在/usr/local/development/mysql-5.5.25目錄，導致在啟動MySQL服務時報告找不到/usr/local/mysql目錄的錯誤。最後我就創建了符號鏈/usr/local/mysql鏈接到/usr/local/development/mysql-5.5.25，解決了服務啟動不了的問題。
為什麽會出現此問題呢？我們可以打開mysql.server腳本文件，裏面有這樣的代碼：
# If you install MySQL on some other places than /usr/local/mysql, then you # have to do one of the following things for this script to work: # # - Run this script from within the MySQL installation directory # - Create a /etc/my.cnf file with the following information: # [mysqld] # basedir=<path-to-mysql-installation-directory> # - Add the above to any other configuration file (for example ~/.my.ini) # and copy my_print_defaults to /usr/bin # - Add the path to the mysql-installation-directory to the basedir variable # below. # # If you want to affect other MySQL variables, you should make your changes # in the /etc/my.cnf, ~/.my.cnf or other MySQL configuration files. # If you change base dir, you must also change datadir. These may get # overwritten by settings in the MySQL configuration files. basedir= datadir= # The following variables are only set for letting mysql.server find things. # Set some defaults mysqld_pid_file_path= if test -z "$basedir" then basedir=/usr/local/mysql bindir=/usr/local/mysql/bin if test -z "$datadir" then datadir=/usr/local/mysql/data fi sbindir=/usr/local/mysql/bin libexecdir=/usr/local/mysql/bin else bindir="$basedir/bin" if test -z "$datadir" then datadir="$basedir/data" fi sbindir="$basedir/sbin" libexecdir="$basedir/libexec" fi
也就是說，/usr/local/mysql目錄是它的默認安裝目錄。要解決此問題，需要有兩個步驟。
步驟一：創建/etc/my.cnf文件，裏面包含basedir目錄設定。
cd /usr/local/development/mysql-5.5.25/support-files
sudo cp my-medium.cnf my.cnf
cd /etc
sudo ln -s /usr/local/development/mysql-5.5.25/support-files/my.cnf然後將basedir=/usr/local/development/mysql-5.5.25這一條指令放到my.cnf文件的mysqld段。
# The MySQL server [mysqld] ...... basedir=/usr/local/development/mysql-5.5.25
步驟二：將mysql目錄下的bin/my_print_defaults鏈接到/usr/bin目錄下。
cd /usr/bin
sudo ln -s /usr/local/development/mysql-5.5.25/bin/my_print_defaults為什麽需要my_print_defaults呢？這是因為mysql.server執行時就是通過my_print_defaults來讀取my.cnf配置變量的。
完成上面兩個步驟後，刪除/usr/local/mysql，也應該是可以正常啟動和停止mysql服務的。
MySQL啟動時必需到usr/local/mysql目錄的問題解決方法