CentOS 7 DIG command tool is patched with EDNS

The dig tool does not support Google edns by default. By patching, dig supports + client query, such as the following code:

#下载bind包

wget ftp://ftp.isc.org/isc/bind9/9.9.9/bind-9.9.9.tar.gz

tar xf bind-9.9.3.tar.gz

cd bind-9.9.9

#从Wilmer van der Gaast下载补丁.

wget https://wilmer.gaa.st/edns-client-subnet/bind-9.9.3-dig-edns-client-subnet-iana.diff

#Patch the code, configure (without OpenSSL because we only want dig) and compile.

patch -p0 < bind-9.9.3-dig-edns-client-subnet-iana.diff

./configure --without-openssl

make

In the bind-9.9.9 / bin / dig directory, you can find the compiled dig binary tool!

[root@localhost dig]# pwd
/usr/local/src/bind-9.9.9/bin/dig

Copy the compiled dig binary command to the / usr / bin directory to replace the original old version

mv /usr/bin/dig /usr/bin/dig.bak
​​​​​​​cp /usr/local/src/bind-9.9.9/bin/dig/dig /usr/bin/