In all command you could specify --password=[password] but it's not safe. Option -p will prompt you to enter password
| mysql -u [user] -p -e "show databases" | list db on server | ||
| mysql -u [user] -p -r [dbname] -e "show tables" | list tables of dbname | ||
| mysqldump -u [user] -p --databases [dbname] > [backupfile] | backup database to file | ||
| mysqladmin -u [user] -p processlist | list mysql current process | ||