pkfix: 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 Debian possible default full paths are:

/usr/bin/pkfix - from package: texlive-extra-utils

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

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