spotread: 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/spotread - from package: argyll

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

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