cvpcb: 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 CentOS possible default full paths are:

/usr/bin/cvpcb - from package: kicad

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/cvpcb - from package: kicad

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

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