sdfcli: 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/sdfcli - from package: sdf

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

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