field: 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/field - from package: rheolef

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

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