rakarrack: 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/rakarrack - from package: rakarrack

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

On Debian possible default full paths are:

/usr/bin/rakarrack - from package: rakarrack

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

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