bucky: command not found

Have You tried accessing the binary with the full path?

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/bucky - from package: python-bucky

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