glite-sd-query: 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/glite-sd-query - from package: is-interface

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

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