ibis: 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/ibis - from package: ibutils

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

On Debian possible default full paths are:

/usr/bin/ibis - from package: ibutils

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

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