sdcv: 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 CentOS possible default full paths are:

/usr/bin/sdcv - from package: sdcv

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/sdcv - from package: sdcv

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

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