bugpoint: 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/bugpoint - from package: llvm

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

On Debian possible default full paths are:

/usr/bin/bugpoint - from package: llvm
/usr/lib/llvm-3.4/bin/bugpoint - from package: llvm-3.4
/usr/lib/llvm-3.5/bin/bugpoint - from package: llvm-3.5

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

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