adjtimexconfig: 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/adjtimexconfig - from package: adjtimex

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

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