cvs-switchroot: 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/cvs-switchroot - from package: cvs

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

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