obus-dump: 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/obus-dump - from package: libobus-ocaml-bin

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

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