memctouch: 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/memctouch - from package: libmemcached-tools

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

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