kf-slam: 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/kf-slam - from package: mrpt-apps

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

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