ftplist: 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/ftplist - from package: qftp

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

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