irxevent: 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/irxevent - from package: lirc

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

On Debian possible default full paths are:

/usr/bin/irxevent - from package: lirc-x

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

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