kinit: 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/lib/heimdal/bin/kinit - from package: heimdal-workstation
/usr/bin/kinit - from package: krb5-workstation

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

On Debian possible default full paths are:

/usr/bin/kinit - from package: krb5-user
/usr/lib/klibc/bin/kinit - from package: klibc-utils

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

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