smb4k: 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/smb4k - from package: smb4k

You may install the required package with command apt-get install {package}
Error in other languages:
smb4k: bevel nie gevind nie
smb4k: comandă negăsită
smb4k: comando não encontrado
smb4k: commande introuvable
smb4k: command not found
smb4k: käsku ei ole
smb4k: không tìm thấy lệnh
smb4k: komanda nerasta
smb4k: Kommando nicht gefunden.
smb4k: kommandot finns inte
smb4k: komut yok
smb4k: nie znaleziono polecenia
smb4k: níor aimsíodh an t-ordú
smb4k: no se encontró la orden
smb4k: no s'ha trobat l'ordre
smb4k: opdracht niet gevonden
smb4k: parancs nem található
smb4k: perintah tidak ditemukan
smb4k: príkaz nenájdený
smb4k: příkaz nenalezen
smb4k: команда не найдена
smb4k: командата не е открита
smb4k: 命令找不到
smb4k: コマンドが見つかりません