objdump86: 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/objdump86 - from package: dev86

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

On Debian possible default full paths are:

/usr/bin/objdump86 - from package: bin86

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

Error in other languages:
objdump86: bevel nie gevind nie
objdump86: comandă negăsită
objdump86: comando não encontrado
objdump86: commande introuvable
objdump86: command not found
objdump86: käsku ei ole
objdump86: không tìm thấy lệnh
objdump86: komanda nerasta
objdump86: Kommando nicht gefunden.
objdump86: kommandot finns inte
objdump86: komut yok
objdump86: nie znaleziono polecenia
objdump86: níor aimsíodh an t-ordú
objdump86: no se encontró la orden
objdump86: no s'ha trobat l'ordre
objdump86: opdracht niet gevonden
objdump86: parancs nem található
objdump86: perintah tidak ditemukan
objdump86: príkaz nenájdený
objdump86: příkaz nenalezen
objdump86: команда не найдена
objdump86: командата не е открита
objdump86: 命令找不到
objdump86: コマンドが見つかりません