pamusb-conf: 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

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/pamusb-conf - from package: pamusb-common

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