frogr: 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/frogr - from package: frogr

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

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