olsr_print_databases: 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 Debian possible default full paths are:

/usr/lib/xorp/bin/olsr_print_databases - from package: xorp

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

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