MACOS使用locate命令一直提示:WARNING: The locate database (/var/db/locate.database) does not exist. To create

现象

在macOS上使用locate命令查找文件的时候，报错如下：

$ locate jdk 
WARNING: The locate database (/var/db/locate.database) does not exist.To create the database, run the following command:
  sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.locate.plist
Please be aware that the database can take some time to generate; once
the database has been created, this message will no longer appear.

按照系统的提示，使用sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.locate.plist这个命令，提示如下：

$ sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.locate.plist
Password:
/System/Library/LaunchDaemons/com.apple.locate.plist: service already loaded

然后再次使用locate命令，仍旧是提示上面的错误，db不存在。

解决方法

使用命令sudo /usr/libexec/locate.updatedb,直接更新locate的db，等几分钟后再使用locate命令。