ktserver: 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/ktserver - from package: kyototycoon

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

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