forsort: 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/bin/forsort - from package: Canna

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

On Debian possible default full paths are:

/usr/bin/forsort - from package: Canna

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

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