lrunzip: 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/lrunzip - from package: lrzip

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

On Debian possible default full paths are:

/usr/bin/lrunzip - from package: lrzip

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

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