dnginfo: 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

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/bin/dnginfo - from package: kipi-plugins

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