lgroupdel: 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/sbin/lgroupdel - from package: libuser

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

On Debian possible default full paths are:

/usr/sbin/lgroupdel - from package: libuser

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

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