skrooge: 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
/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/skrooge - from package: skrooge

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