ktikz: 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/ktikz - from package: ktikz

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

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