viewvc-cvsdbadmin: 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/sbin/viewvc-cvsdbadmin - from package: viewvc-query

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

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