Ubuntu 18, не получается выполнить команду sudo apt-get update, как исправить?
root@server:~# sudo apt-get update
Hit:1 http://mirror.yandex.ru/ubuntu bionic InRelease
Hit:2 http://mirror.yandex.ru/ubuntu bionic-updates InRelease
Hit:3 http://mirror.yandex.ru/ubuntu bionic-backports InRelease
Hit:4 http://security.ubuntu.com/ubuntu bionic-security InRelease
Hit:5 http://download.ispsystem.com/repo/ubuntu base-bionic InRelease
Hit:6 http://download.ispsystem.com/repo/ubuntu 5.259-bionic InRelease
Get:7 https://repo.cloudlinux.com/kernelcare-debian/6 stable InRelease [1,857 B]
Err:7 https://repo.cloudlinux.com/kernelcare-debian/6 stable InRelease
The following signatures were invalid: E58FE9B3FE3B0470525159BD6DC3D600CDEF74BB
Reading package lists... Done
W: GPG error: https://repo.cloudlinux.com/kernelcare-debian/6 stable InRelease: The following signatures were invalid: E58FE9B3FE3B0470525159BD6DC3D600CDEF74BB
E: The repository 'http://repo.cloudlinux.com/kernelcare-debian/6 stable InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.