debsnap: 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/debsnap - from package: devscripts

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

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