irdaping: 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/sbin/irdaping - from package: irda-utils

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

On Debian possible default full paths are:

/usr/sbin/irdaping - from package: irda-utils

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

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