kdigest: 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/kdigest - from package: heimdal-clients
/usr/lib/debug/usr/sbin/kdigest - from package: heimdal-dbg

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

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