tzconfig: 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/sbin/tzconfig - from package: tzdata

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

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