iki-git-hook-update: 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/bin/iki-git-hook-update - from package: ikiwiki-hosting-web

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

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