[root@ubuntu /]# grub-install /dev/nvme0n1p6
Installing for i386-pc platform.
/proc/devices: fopen failed: No such file or directory.
/proc/devices: fopen failed: No such file or directory.
/proc/devices: fopen failed: No such file or directory.
/proc/devices: fopen failed: No such file or directory.
grub-install: warning: File system `ext2' doesn't support embedding.
grub-install: warning: Embedding is not possible. GRUB can only be installed in this setup by using blocklists. However, blocklists are UNRELIABLE and their use is discouraged..
grub-install: error: will not proceed with blocklists.