saml_assertion_init: 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/saml_assertion_init - from package: nordugrid-arc-misc-utils

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

On Debian possible default full paths are:

/usr/bin/saml_assertion_init - from package: nordugrid-arc-misc-utils

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

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