zfs-fuse: 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/zfs-fuse - from package: zfs-fuse

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

On Debian possible default full paths are:

/sbin/zfs-fuse - from package: zfs-fuse

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

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