cougar: 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/cougar - from package: alliance

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

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