Linux、Unix常用命令笔记

1、查看是否安装了jdk

　　rpm -qa |grep java

2、查看位数(Linux/MacOS通用)

　　getconf LONG_BIT

3、MacOS上安装了Mysql后

    执行文件目录:/usr/local/mysql/bin

    命令打开停止mysql

    sudo /Library/StartupItems/MySQLCOM/MySQLCOM restart

    sudo /Library/StartupItems/MySQLCOM/MySQLCOM start

    sudo /Library/StartupItems/MySQLCOM/MySQLCOM stop

4、停止apach服务

    sudo apachectl stop