dhisd: command not found

Have You tried accessing the binary with the full path?

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/dhisd - from package: dhis-server

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