ext2spice: 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/ext2spice - from package: magic

You may install the required package with command apt-get install {package}
Error in other languages:
ext2spice: bevel nie gevind nie
ext2spice: comandă negăsită
ext2spice: comando não encontrado
ext2spice: commande introuvable
ext2spice: command not found
ext2spice: käsku ei ole
ext2spice: không tìm thấy lệnh
ext2spice: komanda nerasta
ext2spice: Kommando nicht gefunden.
ext2spice: kommandot finns inte
ext2spice: komut yok
ext2spice: nie znaleziono polecenia
ext2spice: níor aimsíodh an t-ordú
ext2spice: no se encontró la orden
ext2spice: no s'ha trobat l'ordre
ext2spice: opdracht niet gevonden
ext2spice: parancs nem található
ext2spice: perintah tidak ditemukan
ext2spice: príkaz nenájdený
ext2spice: příkaz nenalezen
ext2spice: команда не найдена
ext2spice: командата не е открита
ext2spice: 命令找不到
ext2spice: コマンドが見つかりません