lzfgrep: command not found

Have You tried accessing the binary with the full path?

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/lzfgrep - from package: xz-lzma-compat

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