xzmore: 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/xzmore - from package: xz

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

On Debian possible default full paths are:

/usr/bin/xzmore - from package: xz-utils

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

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