bundle: 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/bundle - from package: rubygem-bundler
/usr/lib/ruby/gems/1.8/gems/bundler-1.5.2/bin/bundle - from package: rubygem-bundler

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

On Debian possible default full paths are:

/usr/bin/bundle - from package: bundler
/usr/share/redmine/bin/bundle - from package: redmine
/usr/lib/ruby/vendor_ruby/rails/generators/rails/app/templates/bin/bundle - from package: ruby-railties

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

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