cvs2cl: 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/bin/cvs2cl - from package: cvs2cl

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

Error in other languages:
cvs2cl: bevel nie gevind nie
cvs2cl: comandă negăsită
cvs2cl: comando não encontrado
cvs2cl: commande introuvable
cvs2cl: command not found
cvs2cl: käsku ei ole
cvs2cl: không tìm thấy lệnh
cvs2cl: komanda nerasta
cvs2cl: Kommando nicht gefunden.
cvs2cl: kommandot finns inte
cvs2cl: komut yok
cvs2cl: nie znaleziono polecenia
cvs2cl: níor aimsíodh an t-ordú
cvs2cl: no se encontró la orden
cvs2cl: no s'ha trobat l'ordre
cvs2cl: opdracht niet gevonden
cvs2cl: parancs nem található
cvs2cl: perintah tidak ditemukan
cvs2cl: príkaz nenájdený
cvs2cl: příkaz nenalezen
cvs2cl: команда не найдена
cvs2cl: командата не е открита
cvs2cl: 命令找不到
cvs2cl: コマンドが見つかりません