create-munge-key: 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/sbin/create-munge-key - from package: munge

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

On Debian possible default full paths are:

/usr/sbin/create-munge-key - from package: munge

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

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