All my problem is in the title, but here are some of my informations :
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fdisk -l /dev/sdb ✔ 09:49:51
Disk /dev/sdb: 59.48 GiB, 63864569856 bytes, 124735488 sectors
Disk model: Card Reader
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x4abfef6c
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 411647 409600 200M c W95 FAT32 (LBA)
/dev/sdb2 411648 124735487 124323840 59.3G 83 Linux
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and so this command was passed without any errors.
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mkfs.vfat /dev/sdb1 && mkdir boot && mount /dev/sdb1 boot && mkfs.ext4 /dev/sdb2 && mkdir root && mount /dev/sdb2 root && wgetmake_clickable_callback(MAGIC_URL_FULL, ' ', 'http://os.archlinuxarm.org/os/ArchLinuxARM-rpi-aarch64-latest.tar.gz', '', ' class="postlink"') && bsdtar -xpf ArchLinuxARM-rpi-aarch64-latest.tar.gz -C root && sync && umount boot root
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Did i do something wrong ???

ps : this :
make_clickable_callback(MAGIC_URL_FULL, ' ', '
', '', ' class="postlink"')
are added by the archlinux forum, i totaly do not understand why this happen, but this text should not be here, it was not me. I cannot send the link without this bug.
make_clickable_callback(MAGIC_URL_FULL, '
', 'http://www.google.com', '', ' class="postlink"')