ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/run/mysqld/mysqld.sock' (2 "No such file or directory")
i get this error when i run the command : "mysql -u root -p"
i m currently using manjaro linux.

What does:
Say?

the command was just executed successfully without an error but didnt give me any output.

Well, that most likely means that you do not have a mysql server up and running, since it is not listening on any port.

How did you start your mysql server, if at all?

Also, what does:
say?

[bakabon@bakabon-Xenon mysql]$ ps aux | grep mysql
root 3758 0.0 0.1 70072 4864 pts/0 T 22:54 0:00 sudo mysqld_safe
root 3759 0.0 0.0 13888 3252 pts/0 T 22:54 0:00 /bin/sh /usr/bin/mysqld_safe
mysql 3873 0.1 3.0 656468 121084 pts/0 Sl 22:54 0:00 /usr/bin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --user=mysql --log-error=/var/lib/mysql/bakabon-Xenon.err --pid-file=bakabon-Xenon.pid --socket=/run/mysqld/mysqld.sock --port=3306
bakabon 4000 0.0 0.2 43024 9360 pts/0 S+ 22:56 0:00 mysql
bakabon 4023 0.0 0.0 10764 2104 pts/1 S+ 22:58 0:00 grep --colour=auto mysql

Do you have a /run directory in your system?
Look like a setup error to me (should be /var/run)

/run is simply a symlink to /var/run (at least on arch linux) so it shouldn't really matter.

Best regards,
HMW

Ah thanks !

To Op: Did you check /run/mysqld content and permissions?

how do i do it?

Kali Linux is your installed OS?

I ask because I heard there are no other user than root in setup, and mysql requires 'mysql' user and group

Anyway, you can check permissions and content with the ls command