mount.fuse-ext2: 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

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:

/sbin/mount.fuse-ext2 - from package: fuseext2

You may install the required package with command apt-get install {package}
Error in other languages:
mount.fuse-ext2: bevel nie gevind nie
mount.fuse-ext2: comandă negăsită
mount.fuse-ext2: comando não encontrado
mount.fuse-ext2: commande introuvable
mount.fuse-ext2: command not found
mount.fuse-ext2: käsku ei ole
mount.fuse-ext2: không tìm thấy lệnh
mount.fuse-ext2: komanda nerasta
mount.fuse-ext2: Kommando nicht gefunden.
mount.fuse-ext2: kommandot finns inte
mount.fuse-ext2: komut yok
mount.fuse-ext2: nie znaleziono polecenia
mount.fuse-ext2: níor aimsíodh an t-ordú
mount.fuse-ext2: no se encontró la orden
mount.fuse-ext2: no s'ha trobat l'ordre
mount.fuse-ext2: opdracht niet gevonden
mount.fuse-ext2: parancs nem található
mount.fuse-ext2: perintah tidak ditemukan
mount.fuse-ext2: príkaz nenájdený
mount.fuse-ext2: příkaz nenalezen
mount.fuse-ext2: команда не найдена
mount.fuse-ext2: командата не е открита
mount.fuse-ext2: 命令找不到
mount.fuse-ext2: コマンドが見つかりません