lmConfigEditor: 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 Debian possible default full paths are:

/usr/share/lemonldap-ng/bin/lmConfigEditor - from package: liblemonldap-ng-manager-perl

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

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