How do I login into VE without knowing its root password?

How do I login into VE without knowing its root password?

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There are many ways for a hardware node owner to login into a VE or execute a command in VE context.

# vzctl exec 101 /bin/ls

will execute '/bin/ls' command inside VE #101.

# vzctl enter 101

will run a shell in VE #101.

If you need to log into VE #101 as root by SSH you can add a user with UID=0 to /vz/root/101/etc/passwd and set a password for this user using

# vzctl exec 101 passwd username