lbzexe: command not found

Have You tried accessing the binary with the full path?

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/lbzexe - from package: lbzip2-utils

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