update xampp mysql in ubuntu

i am a student, i am learning mysql. i have installed xampp in linux and it have been running for a while according to this video https://www.youtube.com/watch?v=R5CUn5wGQGg , but one day when i read the error log, it show this:

InnoDB: Table mysql/innodb_index_stats has length mismatch in the column name table_name. Please run mysql_upgrade

i tried to run mysql_upgrade in ubuntu terminal, or use a phpmyadmin to run the command, but neither of them works

for terminal, it shows:

kelvin@kelvin-linux:~/Desktop/1.16.5main_switch$ mysql-upgrade

Command 'mysql-upgrade' not found, did you mean:

  command 'mysql_upgrade' from deb mysql-server-core-8.0 (8.0.25-0ubuntu0.20.04.1)
  command 'mysql_upgrade' from deb mariadb-server-core-10.3 (1:10.3.29-0ubuntu0.20.04.1)

Try: sudo apt install <deb name>

kelvin@kelvin-linux:~/Desktop/1.16.5main_switch$ 

xampp version: libmysql - mysqlnd 8.0.6

Apache/2.4.47 (Unix) OpenSSL/1.1.1k PHP/8.0.6 mod_perl/2.0.11 Perl/v5.32.1

i tried to google but most of them are for windows, i am not sure whether they work for ubuntu too.

update1:

kelvin@kelvin-linux:~/Desktop/1.16.5main_switch$ mysql_upgrade

Command 'mysql_upgrade' not found, but can be installed with:

sudo apt install mysql-server-core-8.0     # version 8.0.25-0ubuntu0.20.04.1, or
sudo apt install mariadb-server-core-10.3  # version 1:10.3.29-0ubuntu0.20.04.1

kelvin@kelvin-linux:~/Desktop/1.16.5main_switch$ 

You typed "mysql-upgrade", but the actual command is "mysql_upgrade". That's an underscore not a minus between the words.