smbldap-usermod: 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/smbldap-usermod - from package: smbldap-tools

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

On Debian possible default full paths are:

/usr/sbin/smbldap-usermod - from package: smbldap-tools

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

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