Feb 20, 2019 · NSCD is the preferred DNS caching system for the majority of RedHat-based Linux operating systems. Therefore, if you’re using OpenSUSE Linux, CentOS or something similar, there’s a good chance that you’ll need to fuss with it to clear your DNS cache. Note: though Fedora Linux is RedHat-based, by default it does not store a DNS cache.
How To Troubleshoot DNS Client Issues in Linux As DNS is an important service being able to troubleshoot it is a useful skill. By default Linux will first check it’s local host file /etc/hosts before querying DNS servers defined in /etc/resolv.conf. It is important to confirm that the correct DNS servers have been specified within this file and that you can connect to them on TCP/UDP port 53. How To Use nslookup Command & Dig Command For DNS Check … Under Options, select the Show command check box.; Under Nameservers, select the server that you want to use for the DNS query.You can use the default name server, or select a specific DNS server, like OpenDNS or Google. Click Dig.The page displays the results from dig, … Test Your DNS Servers - RouterSecurity.org
Oct 31, 2018 · On Linux, there are multiple ways to test if DNS works, and in this post we’ll review how DNS servers are configured and what commands you can use to test them. DNS server configuration Every host needs to have a list of DNS server IPs, and, in most cases, this list comes from the DHCP lease.
Linux for Network Engineers: How to Resolve a Host & Test Oct 31, 2018 The DNS configuration in Debian • Linux Hub
Linux / UNIX: DNS Lookup Command - nixCraft
How To Check DNS Records Using Basic Nslookup Command … May 21, 2016 How to Find Default Gateway in Linux | Unixmen