proton-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 CentOS possible default full paths are:

/usr/bin/proton-dump - from package: qpid-proton-c

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/proton-dump - from package: qpid-proton-dump

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

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