parrot: 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/parrot - from package: parrot

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

On Debian possible default full paths are:

/usr/bin/parrot - from package: parrot-minimal

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

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