Reset the root password in mysql in Ubuntu 18.04 OS - mysql

Question

ok here's the thing I tried installing MySQL-server and it did install perfectly no problem there.
later I had had to format my system and then when I tried to install it, it did install but it did not prompt for the root password. when I later tried to reset the root password here's the problem I get
user#user:~$ sudo /etc/init.d/mysql stop
[ ok ] Stopping mysql (via systemctl): mysql.service.
user#user:~$ sudo mysqld --skip-grant-tables &
[3] 13831
user#user:~$ mysql -u root -p
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
[3] Exit 1 sudo mysqld --skip-grant-tables
I tried resolving the 2002 error but I am unable to do so. any help will be appreciated.
from what I understand I should not get the 2002 error to proceed further

Answer 1

The error is probably due to error in installation. Try the following:
Ensure that my MySQL service is running by executing the following command in the terminal:
$ sudo service mysql start
Verify the state of the process:
$ ps -A|grep mysql
$ ps -A|grep mysqld
Then kill the process with the following command:
$ sudo pkill mysql
$ sudo pkill mysqld
Finally restart the service:
$ sudo service mysql restart
And run the following command:
$ mysql -u root -p

Answer 2

Step#1: Run this command:
sudo mysql_secure_installation
Step#2: press n
Step#3: input your password.
Step#4: press y for until it says All done!
or follow this video tutorial
Also to change the password use this command:
mysql> ALTER USER 'root'#'localhost' IDENTIFIED WITH mysql_native_password BY 'your_password';