lbzforce: 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/lbzforce - from package: lbzip2-utils

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

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