lbunzip2: 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/lbunzip2 - from package: lbzip2

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

On Debian possible default full paths are:

/usr/bin/lbunzip2 - from package: lbzip2

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

Error in other languages:
lbunzip2: bevel nie gevind nie
lbunzip2: comandă negăsită
lbunzip2: comando não encontrado
lbunzip2: commande introuvable
lbunzip2: command not found
lbunzip2: käsku ei ole
lbunzip2: không tìm thấy lệnh
lbunzip2: komanda nerasta
lbunzip2: Kommando nicht gefunden.
lbunzip2: kommandot finns inte
lbunzip2: komut yok
lbunzip2: nie znaleziono polecenia
lbunzip2: níor aimsíodh an t-ordú
lbunzip2: no se encontró la orden
lbunzip2: no s'ha trobat l'ordre
lbunzip2: opdracht niet gevonden
lbunzip2: parancs nem található
lbunzip2: perintah tidak ditemukan
lbunzip2: príkaz nenájdený
lbunzip2: příkaz nenalezen
lbunzip2: команда не найдена
lbunzip2: командата не е открита
lbunzip2: 命令找不到
lbunzip2: コマンドが見つかりません