klog.afs: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/klog.afs - from package: openafs-client

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