crlutil: 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/crlutil - from package: nss-tools

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

On Debian possible default full paths are:

/usr/bin/crlutil - from package: libnss3-tools

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

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