edg-gridftp-ls: 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/edg-gridftp-ls - from package: edg-gridftp-client

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

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