dsdp5: 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/dsdp5 - from package: dsdp

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

Error in other languages:
dsdp5: bevel nie gevind nie
dsdp5: comandă negăsită
dsdp5: comando não encontrado
dsdp5: commande introuvable
dsdp5: command not found
dsdp5: käsku ei ole
dsdp5: không tìm thấy lệnh
dsdp5: komanda nerasta
dsdp5: Kommando nicht gefunden.
dsdp5: kommandot finns inte
dsdp5: komut yok
dsdp5: nie znaleziono polecenia
dsdp5: níor aimsíodh an t-ordú
dsdp5: no se encontró la orden
dsdp5: no s'ha trobat l'ordre
dsdp5: opdracht niet gevonden
dsdp5: parancs nem található
dsdp5: perintah tidak ditemukan
dsdp5: príkaz nenájdený
dsdp5: příkaz nenalezen
dsdp5: команда не найдена
dsdp5: командата не е открита
dsdp5: 命令找不到
dsdp5: コマンドが見つかりません