cm2rem: 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/cm2rem - from package: tkremind

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

Error in other languages:
cm2rem: bevel nie gevind nie
cm2rem: comandă negăsită
cm2rem: comando não encontrado
cm2rem: commande introuvable
cm2rem: command not found
cm2rem: käsku ei ole
cm2rem: không tìm thấy lệnh
cm2rem: komanda nerasta
cm2rem: Kommando nicht gefunden.
cm2rem: kommandot finns inte
cm2rem: komut yok
cm2rem: nie znaleziono polecenia
cm2rem: níor aimsíodh an t-ordú
cm2rem: no se encontró la orden
cm2rem: no s'ha trobat l'ordre
cm2rem: opdracht niet gevonden
cm2rem: parancs nem található
cm2rem: perintah tidak ditemukan
cm2rem: príkaz nenájdený
cm2rem: příkaz nenalezen
cm2rem: команда не найдена
cm2rem: командата не е открита
cm2rem: 命令找不到
cm2rem: コマンドが見つかりません