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p - PID (Linux)<br />
s - statistics
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==DIG==
 
View Short Output
dig redhat.com +short
 
Display Only the ANSWER SECTION
dig redhat.com +nocomments +noquestion +noauthority +noadditional +nostats
dig redhat.com +noall +answer
 
Use a Specific DNS server Using dig @dnsserver
dig @ns1.redhat.com redhat.com
 
DNS Reverse Look-up
dig -x 209.132.183.81 +short
 
View ALL DNS Records Types
dig redhat.com ANY +noall +answer
dig @ns1.redhat.com redhat.com ANY +noall +answer
 
Query MX Records
dig redhat.com MX +noall +answer
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​sudo apt-get install qrencode
qrencode -t ANSI "Hello World"​
 
==VI Editor==
Shortcuts:
i = insert
crtl + c = exit insert mode
ZZ or :x = save & exit
 
 
==Create Hotspot in Ubuntu==