Fred's Blog » debian

Speeding up DNS lookups with dnsmasq

admin — Fri, 04 Dec 2009 23:35:44 +0000

Speed up DNS lookups by using dnsmasq as a DNS cache:

First install dnsmasq: sudo apt-get install dnsmasq

Update /etc/dnsmasq.conf to include: listen-address=127.0.0.1

Update /etc/dhcp3/dhclient.conf to include: prepend domain-name-servers 127.0.0.1;

Finally, edit /etc/resolv.conf and add: nameserver 127.0.0.1

Test DNS caching:
1. dig google.com 19 msec
2. dig google.com 0 msec!!!

VoilÃ

Importing keys into the apt keyring

admin — Tue, 13 Nov 2007 10:37:47 +0000

Simple approach to loading apt keys from a key server into the apt keyring:

# import key to keyring from key server
sudo gpg –keyserver subkeys.pgp.net –recv-key A040830F7FAC5991

# check key fingerprint (optional)
sudo gpg –fingerprint A040830F7FAC5991

# export key to apt keyring
sudo gpg –armor –export A040830F7FAC5991 | sudo apt-key add -

This should address the following apt-get / aptitude error:

GPG error: http://dl.google.com stable Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY A040830F7FAC5991