k3d-sl2xml: 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/k3d-sl2xml - from package: k3d

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

Error in other languages:
k3d-sl2xml: bevel nie gevind nie
k3d-sl2xml: comandă negăsită
k3d-sl2xml: comando não encontrado
k3d-sl2xml: commande introuvable
k3d-sl2xml: command not found
k3d-sl2xml: käsku ei ole
k3d-sl2xml: không tìm thấy lệnh
k3d-sl2xml: komanda nerasta
k3d-sl2xml: Kommando nicht gefunden.
k3d-sl2xml: kommandot finns inte
k3d-sl2xml: komut yok
k3d-sl2xml: nie znaleziono polecenia
k3d-sl2xml: níor aimsíodh an t-ordú
k3d-sl2xml: no se encontró la orden
k3d-sl2xml: no s'ha trobat l'ordre
k3d-sl2xml: opdracht niet gevonden
k3d-sl2xml: parancs nem található
k3d-sl2xml: perintah tidak ditemukan
k3d-sl2xml: príkaz nenájdený
k3d-sl2xml: příkaz nenalezen
k3d-sl2xml: команда не найдена
k3d-sl2xml: командата не е открита
k3d-sl2xml: 命令找不到
k3d-sl2xml: コマンドが見つかりません