gfs-gfork-master: 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/gfs-gfork-master - from package: globus-gridftp-server-progs

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

On Debian possible default full paths are:

/usr/sbin/gfs-gfork-master - from package: globus-gridftp-server-progs
/usr/lib/debug/usr/sbin/gfs-gfork-master - from package: globus-gridftp-server-dbg

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

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