smart: command not found

Have You tried accessing the binary with the full path?

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/smart - from package: smartpm-core

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