fuse-gtk: 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 Debian possible default full paths are:

/usr/bin/fuse-gtk - from package: fuse-emulator-gtk

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

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