klist: 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/klist - from package: heimdal-workstation
/usr/bin/klist - from package: krb5-workstation

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

On Debian possible default full paths are:

/usr/bin/klist - from package: krb5-user

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

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