bbhostgrep: 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/lib/xymon/server/bin/bbhostgrep - from package: xymon

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

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