rmtermd: command not found

Have You tried accessing the binary with the full path?

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/sbin/rmtermd - from package: dnet-progs

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