ogonkify: 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/ogonkify - from package: a2ps

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

On Debian possible default full paths are:

/usr/bin/ogonkify - from package: a2ps

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

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