update-binfmts: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/sbin/update-binfmts - from package: binfmt-support

You may install the required package with command apt-get install {package}

Error in other languages:
update-binfmts: bevel nie gevind nie
update-binfmts: comandă negăsită
update-binfmts: comando não encontrado
update-binfmts: commande introuvable
update-binfmts: command not found
update-binfmts: käsku ei ole
update-binfmts: không tìm thấy lệnh
update-binfmts: komanda nerasta
update-binfmts: Kommando nicht gefunden.
update-binfmts: kommandot finns inte
update-binfmts: komut yok
update-binfmts: nie znaleziono polecenia
update-binfmts: níor aimsíodh an t-ordú
update-binfmts: no se encontró la orden
update-binfmts: no s'ha trobat l'ordre
update-binfmts: opdracht niet gevonden
update-binfmts: parancs nem található
update-binfmts: perintah tidak ditemukan
update-binfmts: príkaz nenájdený
update-binfmts: příkaz nenalezen
update-binfmts: команда не найдена
update-binfmts: командата не е открита
update-binfmts: 命令找不到
update-binfmts: コマンドが見つかりません