Sudo says password is wrong

[Sahaj]

I am completely newbie to linux
when i installed manjaro i set root password same to login password but when i do anything with sudo it says wrong password
its correct in su
i wanted to downoload opera so i went to manjaro hello>applications and then selected opera then i updated system, it says enter password but its wrong again
i am pretty sure that i am typing the correct password

[megavolt]

Hello and welcome @Sahaj

Have a look here:

Password for performing updates

Yes, sudo or polkit will always ask for the user password. Root has its own account and have full access on everything. This asks for the root password: su && whoami && exit This asks for the user password: sudo su && whoami && exit (but only if the user is in the wheel group) This way you have only temporary root access for only one task and not the whole time. And distinction between the real root and fakeroot (sudo), ensure more security.

[omano]

@Sahaj

when i installed manjaro i set root password same to login password

Did you write twice the password? or did you tick the box to have one unique password?

[freggel.doe]

Login as root via su - and check faillock:

"Sorry, password authentication didn't work. Please try again." - After install

When this happens and you’re logged in as root, check the failllock status for your $user: # faillock --user $user Possibly reset # faillock --user $user --reset and try login as $user again.

[Manfrago]

I would like to suggest querying the status of the current account in advance with

passwd -S

and to translate this output using passwd(1) - Linux manual page / section -S, --status. Neither su nor sudo is required for this.