pagesend: 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/pagesend - from package: hylafax+

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

On Debian possible default full paths are:

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

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

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