gfork: 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/gfork - from package: globus-gfork-progs

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

On Debian possible default full paths are:

/usr/sbin/gfork - from package: globus-gfork-progs
/usr/lib/debug/usr/sbin/gfork - from package: globus-gfork-dbg

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

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