svnrdump: 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/lib/debug/usr/bin/svnrdump - from package: subversion-dbg
/usr/bin/svnrdump - from package: subversion

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