examineAC.pl: 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/examineAC.pl - from package: perl-VOMS-Lite

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

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