getcert: 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/getcert - from package: certmonger

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

On Debian possible default full paths are:

/usr/bin/getcert - from package: certmonger

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

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