error when starting mysql with brew

I'm starting to learn PHP Laravel, I reached the valet installation and came to the point where I need to install mysql with brew with this command

brew install mysql

the mysql installation is done successfully, However when I run the command

brew services start mysql

I get this error that I couldn't find a solution for

 sh: 1: list: not found
 Error: Failure while executing:  load -w 
 /home/chemseddinez/Library/LaunchAgents/homebrew.mxcl.mysql.plist

PS: I'm using ubuntu 16.04 LTS

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