bashbug-64: 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/bashbug-64 - from package: bash

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

Error in other languages:
bashbug-64: bevel nie gevind nie
bashbug-64: comandă negăsită
bashbug-64: comando não encontrado
bashbug-64: commande introuvable
bashbug-64: command not found
bashbug-64: käsku ei ole
bashbug-64: không tìm thấy lệnh
bashbug-64: komanda nerasta
bashbug-64: Kommando nicht gefunden.
bashbug-64: kommandot finns inte
bashbug-64: komut yok
bashbug-64: nie znaleziono polecenia
bashbug-64: níor aimsíodh an t-ordú
bashbug-64: no se encontró la orden
bashbug-64: no s'ha trobat l'ordre
bashbug-64: opdracht niet gevonden
bashbug-64: parancs nem található
bashbug-64: perintah tidak ditemukan
bashbug-64: príkaz nenájdený
bashbug-64: příkaz nenalezen
bashbug-64: команда не найдена
bashbug-64: командата не е открита
bashbug-64: 命令找不到
bashbug-64: コマンドが見つかりません