ikiwiki: 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 CentOS possible default full paths are:

/usr/bin/ikiwiki - from package: ikiwiki

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/ikiwiki - from package: ikiwiki

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

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