dumpelf: 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/dumpelf - from package: pax-utils

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

On Debian possible default full paths are:

/usr/bin/dumpelf - from package: pax-utils

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

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