Flush DNS cache


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Windows ipconfig /flushdns Macintosh OS X sudo dscacheutil -flushcache sudo killall -HUP mDNSResponder Linux (depend on distribution) /etc/rc.d/init.d/nscd restart /etc/init.d/nscd restart /etc/init.d/dnsmasq restart /etc/init.d/named restart

Display CNAME from DNS zone


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Below command will display the CNAME record from the domain zone # host -t axfr domain.com ns1.domain.com | grep -i cname

Replace – Install new Flash card in Cisco router


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Today I replaced Cisco 64MB Flash card with 512MB LEXAR The whole procedure is pretty simple just make a copy of your current IOS, just insert your current Flash card it to the computer with TFTP server installed and copy…