can't connect to local mysql server through socket '/tmp/mysql.socket'

This error message usually occurs when the MySQL server is not running or the socket file is missing or inaccessible. Here are some troubleshooting steps you can try:

1. Check if the MySQL server is running by running the following command in your terminal:

   sudo systemctl status mysql

If the server is not running, start it using the following command:

   sudo systemctl start mysql

2. Check if the socket file exists in the correct location by running the following command in your terminal:

   ls -l /tmp/mysql.sock

If the file is missing, you can create a new socket file using the following command:

   sudo touch /tmp/mysql.sock
   sudo chmod 777 /tmp/mysql.sock

3. Check if the MySQL configuration file is pointing to the correct socket file. Open the file `/etc/mysql/mysql.conf.d/mysqld.cnf` and look for the following line:

   socket = /tmp/mysql.sock

If the line is commented out or pointing to a different location, change it to the correct location and save the file. Then, restart the MySQL server using the following command:

   sudo systemctl restart mysql

If none of these steps solve the issue, it might be a more complex problem that requires further investigation.