ircat: 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/ircat - from package: lirc

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

On Debian possible default full paths are:

/usr/bin/ircat - from package: lirc

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

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