cvsdo: 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/bin/cvsdo - from package: cvsutils

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