multielasticdump: 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/multielasticdump - from package: elasticdump
/usr/lib/node_modules/elasticdump/bin/multielasticdump - from package: elasticdump

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

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