dispread: 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/dispread - from package: argyll

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

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