Mac 下locate命令使用問題WARNING: The locate database (/var/db/locate.database) does not exist.

想在Mac下使用locate時，提醒數據庫沒創建:

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.

根據提示使用 

sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.locate.plist 

 並沒有生效。

需要執行

sudo /usr/libexec/locate.updatedb 進行庫更新。