faxquit: 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/faxquit - from package: hylafax+

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

On Debian possible default full paths are:

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

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

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