peverify: 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/peverify - from package: mono-devel

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

On Debian possible default full paths are:

/usr/bin/peverify - from package: mono-utils

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

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