memcrm: 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/memcrm - from package: libmemcached-tools

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

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