cam: 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/cam - from package: cam

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

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