spykeviewer: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/spykeviewer - from package: spykeviewer

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