bidentd: 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/sbin/bidentd - from package: bidentd

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

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