🖥️nslookup

➡️This is a command-line reference manual for commands and command combinations that you don’t use often enough to remember it. This cheatsheet explains the nslookup command with important options and switches using examples.

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#==============================#
# CMD NSLOOKUP
#==============================##==============================#
nslookup www.example.com 192.168.1.254

nslookup -q=txt -class=CHAOS version.bind NS.PHX5.NEARLYFREESPEECH.NET
# Check version of DNS Server

busybox nslookup www.example.com 192.168.1.254

nslookup -q=TXT _netblocks.google.com | grep -Po '\b([0-1]?\d{1,2}|2[0-4]\d|25[0-5])(\.([0-1]?\d{1,2}|2[0-4]\d|25[0-5])){3}(/\d{1,2})\b'
# get all Google ipv4 subnets for a iptables firewall for example

nslookup -q=TXT _netblocks.google.com | grep -Eo 'ip4:([0-9\.\/]+)' | cut -d: -f2
# get all Google ipv4 subnets for a iptables firewall for example a bit shorter, parenthesis not needed but added for clarity 

#==============================##==============================#
# CMD NSLOOKUP
#==============================##==============================#

Cheatsheets are an excellent complement to other information sources like Linux man-pages, Linux help, or How-To’s and tutorials, as they provide compact and easily accessible information. While man-pages and detailed tutorials often contain comprehensive explanations and extensive guides, cheatsheets summarize the most important options forthe command nslookup in a clear format. This allows users to quickly access the needed information for nslookup without having to sift through lengthy texts. Especially in stressful situations or for recurring tasks, cheatsheets for nslookup are a valuable resource to work efficiently and purposefully.

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