Bdtyktl

First of all sorry for my English

I have Antergos installed on my Notebook and I accidentally deleted the folder /etc/pam.d so i cannot use any root command neither access to my user session.
I thought about reinstalling the packages which have files installed in pam.d so i tried:

 pacman -S $(pacman -Ql | grep /etc/pam.d/$ | awk '{print $1}') 

into a live usb of Antergos. I did it after mounting the partitions /, /home and uefi in /mnt, /mnt/home and /mnt/boot/efi respectively. Then I did:

 sudo cp /etc/resolv.conf /mnt/etc/  

 sudo cp /etc/hosts mnt/etc/

 sudo mount --bind /dev/ /mnt/dev

 sudo chroot /mnt

 mount -t proc none /proc 

 mount -t sysfs none /sys 

 mount -t devpts none /dev/pts 

And finally tried this options but all of them return the same error:

 pacman -S $(pacman -Ql | grep /etc/pam.d/$ | awk '{print $1}') 

 pacman -Syu 

 pacman -Syyu 

 pacman -S libpam-runtime libpam-modules 

error that returns:

 error: failed retrieving file ´´´´ from mirror.´´´´ : Could not resolve host: mirror.´´´´´ 

in the ´´´´ go the names of the corresponding files and mirrors

Can you help me recover the /pam.d folder in some way? Am I doing something wrong when I mount the partitions?

PS: I have connection to Internet and I also have a copy of the folder pam.d in /home/user/Downloads (I did the copy before remove it from /etc/)