viewvc.asp: 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/share/gforge/www/scm/viewvc/bin/asp/viewvc.asp - from package: gforge-web-apache2

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

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