Arch from scratch

I finally built my own pc, now lets do it again, this time is a complete from scratch, no os in the system previously

Get the ISO

ref

Verify Arch ISO Signature on macOS

> gpg --verify archlinux-2026.05.01-x86_64.iso.sig archlinux-2026.05.01-x86_64.iso
gpg: Signature made Fri May  1 14:07:18 2026 CST
gpg:                using EDDSA key 3E80CA1A8B89F69CBA57D98A76A5EF9054449A5C
gpg:                issuer "pierre@archlinux.org"
gpg: Good signature from "Pierre Schmitz <pierre@archlinux.org>" [unknown]
gpg: WARNING: The key's User ID is not certified with a trusted signature!
gpg:          There is no indication that the signature belongs to the owner.
      3E80CA1A8B89F69CBA57D98A76A5EF9054449A5C

The signature is valid, the key belongs to the official Arch release engineer, and the fingerprint matches.

> shasum -a 256 archlinux-2026.05.01-x86_64.iso
4af795aab6530e8344553961d0a0e8e84f9622a131ee7d44b0b86b035b2d9ff7  archlinux-2026.05.01-x86_64.iso

match the official:

ISO

    PGP signature
    PGP fingerprint: 0x54449A5C
    SHA256: 4af795aab6530e8344553961d0a0e8e84f9622a131ee7d44b0b86b035b2d9ff7
    BLAKE2b: 2ecbbc0290162e09088c320ce0a09024a4542f9f37468e4175333cc286781f175b87552e6bdecb89738b923a576ad819fd24e58fb6286b6f7a56c6c858a64767

Flash the iso using usb

# on mac
diskutil unmountDisk /dev/disk4  # or otherdisk number stands for your usb, use `diskutil list` to see it
# Unmount of all volumes on disk4 was successful

sudo dd if=archlinux-2026.05.01-x86_64.iso of=/dev/rdisk4 bs=1m
load: 2.82  cmd: dd 34856 uninterruptible 0.00u 0.02s
109+0 records in
109+0 records out
114294784 bytes transferred in 12.896952 secs (8862155 bytes/sec)
1474+1 records in
1474+1 records out
1545814016 bytes transferred in 213.145068 secs (7252403 bytes/sec)

for asock motherboard, make sure your usb file format is labeld ARCH_202605 or somthing similar

go to UEFI shell

# List all mapped filesystems
map

# Look for your USB (usually fs0:, fs1:, etc.)
# Switch to the filesystem
fs0:

# List contents
ls

# Should show: EFI/  boot/  arch/  etc.
# Navigate to the EFI bootloader
cd EFI\BOOT

# Launch Arch
BOOTx64.EFI

Then we’re in the archiso

We can reference this ref now