lrsbuffer: 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/lrsbuffer - from package: lrslib

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

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