vigr: 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/sbin/vigr - from package: shadow-utils

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

On Debian possible default full paths are:

/usr/sbin/vigr - from package: passwd

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

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