edisplay: 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/edisplay - from package: edisplay

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

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