ikidns: 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/ikidns - from package: ikiwiki-hosting-dns

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