remhost: 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/remhost - from package: dmucs

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

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