ktouch: 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/ktouch - from package: ktouch

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

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