unlzf: 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/unlzf - from package: liblzf

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

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