faxlock: 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/faxlock - from package: hylafax+

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

On Debian possible default full paths are:

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

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

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