lbzless: 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/lbzless - from package: lbzip2-utils

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

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