easy_install: 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/easy_install - from package: python-setuptools

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

On Debian possible default full paths are:

/usr/bin/easy_install - from package: python-setuptools

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

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