Hello! I got stuck during installation process. Grub is installed but configuration does not work - grub-mkconfig -o /boot/grub/grub.cfg says /usr/bin/grub-mkconfig: line 245: /boot/grub/grub.cfg.new: No such file or directory.

What have I missed? Are there more information I can provide?

What distro? uefi or legacy mode? did you try running the grub-install command first?

This error probably means that /boot/grub doesn’t exist.

I have used the basic iso from archlinux pages, UEFI mode, yes, I have run the installation, no errors (the installation bar was completed, the app advised me to use grub-mkconfig).

@Berndbausch: I understand that. How can I verify the information? Is it possible that the installation through pacman seemed to be successful (e.g. the console output indicated so) and yet failed? How can I check that?

Is it possible that I did something wrong during the installation proces that could now cause the problem?

On re-reading this, I wonder if my remark sounded arrogant or condescending. If so, sorry.

My guess is that you created /boot at this step: https://wiki.archlinux.org/index.php...e_file_systems. Then, to create /boot/grub, I guess you have to do https://wiki.archlinux.org/index.php...Installation_2. This is where you should look for errors or oversights.

Of course, it can’t be excluded that something or someone removed /boot or /boot/grub. Perhaps there are traces in the logs.

I was not feeling offended, I am glad you are trying to help. Yes, the directory is created. I tried to run the pacman again, I guess it detected previous installation (Warning: ... is up to date -- reinstalling...), the Boot directory is created (and populated), but threre is no Grub subdirectory, if there should be one. Could I have intalled it to wrong location? Find / -type d -name "grub" found two folders of that name: /usr/share/grub and /usr/lib/grub. Is that wrong?

During the grub installation was the efi partition mounted at /boot or /boot/efi. If you had to create the efi partition was it formatted as fat32
Debian based systems mount the efi partition at /boot/efi, I don't use Arch, but when looking up Arch grub documentation I found conflicting info as to where to mount the efi partition.

NO, that is where the package manager installs the grub package to. These files are what is used whenis ran to install the grub bootloader to the efi partition and the grub files to /boot/grub/*.

Did you chroot into your arch installation before installing grub?

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Per instructions from https://linuxhint.com/install-arch-linux/ I am pretty sure I did (90%). Can I verify? Is there something else I could try but start from scratch?

EFI partition was already created by Win10.

The link you posted doesn't mention anything about installing grub on an efi system. Here is some info for installing grub on efi mode:
If you already have an efi partition then you won't have to create it just mount it to /boot/efi
http://fasterland.net/how-to-install...inux-uefi.html
https://gist.github.com/Apsu/4108795

I have followed the tutorial in link, mounted EFI, same result. :/

does the directory /boot/grub exist? If not create the /boot/grub directory.

Since I am interested in Archlinux and UEFI, I started an installation as documented on the Archlinux Wiki. Right before boot loader installation, the EFI system partition exists and is mounted on /boot.

Grub installation is also documented on the Wiki. I installed the grub and efibootmgr packages, then ran grub-install:
After this, /boot/grub exists.

Adding the --verbose option to grub-install (it is extremely verbose; redirect it to a file), I see that it copies a large number of files from /usr/lib/grub to /boot/grub. This is obviously the moment when /boot/grub is created.

Now I also have an installation problem. I end up in the UEFI shell rather than booting Archlinux. Just to tell you that you are not alone

first things first: we are all assuming that you are root when doing these things.

you have asked this twice now.
do you know how to traverse your filesystem with the shell (bash)?
basic commands like cd and ls?
maybe you need to learn that first.

another thing:
during the installation process i do not recommend to use anything else but the archwiki for instructions (except where archwiki itself points to external resources).
and, whenever the archwiki "recommends" something, it means: "unless you're 100% sure why you want to do it differently, this is how you must do it".