Mac install and open mysql using terminal

In MacOS, Mysql's executable file is located in /usr/local/mysql/bin/mysql and you can easily login to it with the following command:

/usr/local/mysql/bin/mysql -u USERNAME -p

But this is a very long command and very boring, so you can add mysql path to Os's Environment variable and access to it much easier.

For macOS Catalina and later

Starting with macOS Catalina, Mac devices use zsh as the default login shell and interactive shell and you have to update .zprofile file in your home directory.

echo 'export PATH="$PATH:/usr/local/mysql/bin"' >> ~/.zprofile
source ~/.zprofile
mysql -u USERNAME -p

For macOS Mojave and earlier

Although you can always switch to zsh, bash is the default shell in macOS Mojave and earlier and with bash you have to update .bash_profile file.

echo 'export PATH="$PATH:/usr/local/mysql/bin"' >> ~/.bash_profile
source ~/.bash_profile
mysql -u USERNAME -p

In the terminal, I typed:

/usr/local/mysql/bin/mysql -u root -p

I was then prompted to enter the temporary password that was given to me upon completion of the installation.

(Updated for 2017)

When you installed MySQL it generated a password for the root user. You can connect using

/usr/local/mysql/bin/mysql -u root -p

and type in the generated password.

Previously, the root user in MySQL used to not have a password and could only connect from localhost. So you would connect using

/usr/local/mysql/bin/mysql -u root

open terminal and type

sudo sh -c 'echo /usr/local/mysql/bin > /etc/paths.d/mysql'

then close terminal and open a new terminal and type

mysql -u root -p

hit enter, and it will ask you for password

I have found this solution on https://teamtreehouse.com/community/says-mysql-command-not-found

now to set new password type

ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass';