faxconfig: 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/sbin/faxconfig - from package: hylafax+

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

On Debian possible default full paths are:

/usr/sbin/faxconfig - from package: hylafax-server

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

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