vows: 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/vows - from package: nodejs-vows
/usr/lib/node_modules/vows/bin/vows - from package: nodejs-vows

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

On Debian possible default full paths are:

/usr/bin/vows - from package: node-vows

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

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