lrzcat: 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/lrzcat - from package: lrzip

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

On Debian possible default full paths are:

/usr/bin/lrzcat - from package: lrzip

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

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