lostirc: 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 Debian possible default full paths are:

/usr/bin/lostirc - from package: lostirc

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

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