fragiso: 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/fragiso - from package: deltaiso

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

On Debian possible default full paths are:

/usr/bin/fragiso - from package: deltarpm

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

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