sdc: 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/sdc - from package: hpsockd

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

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