edfhed: 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/edfhed - from package: aghermann

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

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