encfssh: 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/encfssh - from package: encfs

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