lzmadec: 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/lzmadec - from package: xz-lzma-compat

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

On Debian possible default full paths are:

/usr/bin/lzmadec - from package: xzdec

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

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