lrztar: 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/lrztar - from package: lrzip

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

On Debian possible default full paths are:

/usr/bin/lrztar - from package: lrzip

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

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