ldbdel: 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/ldbdel - from package: ldb-tools

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

On Debian possible default full paths are:

/usr/bin/ldbdel - from package: ldb-tools

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

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