palo: 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:

/sbin/palo - from package: palo

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