fmttest: 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/bin/mh/fmttest - from package: nmh

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

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