qmf-tool: 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/qmf-tool - from package: qpid-tools

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

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