debugreiserfs: 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:

/sbin/debugreiserfs - from package: reiserfsprogs

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

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