shibd: 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/shibd - from package: shibboleth-sp2-utils

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

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