hpssd: 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/sbin/hpssd - from package: hplip

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

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