input-pad: 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/input-pad - from package: input-pad

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

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