ftpget: command not found

Have You tried accessing the binary with the full path?

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/ftpget - from package: qftp

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