encfs: 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 Debian possible default full paths are:

/usr/bin/encfs - from package: encfs

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