lcg-get-checksum: 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/lcg-get-checksum - from package: lcg-util

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

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