pksvm: 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/pksvm - from package: pktools

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

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