geoipupdate: 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/geoipupdate - from package: geoipupdate

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

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