curlftpfs: 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/curlftpfs - from package: curlftpfs

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

On Debian possible default full paths are:

/usr/bin/curlftpfs - from package: curlftpfs

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

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