lfc-modifygrpmap: 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/lfc-modifygrpmap - from package: lfc

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

On Debian possible default full paths are:

/usr/bin/lfc-modifygrpmap - from package: lfc

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

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