• How To Mathematically Convert and Calculate Binary Value To Decimal Value


    When converting binary the easiest way is to write out a vertical list in a format like below and follow the formula in the table. Example Convert 1101 1111 to decimal. Step 1.) Write out the binary below in vertical form (leave lots of space on the left side). Keep this in mind that the "previous sum" starts at 0 on your first line. Step 2.) Formula: 2 *........
  • sed script to automatically update IPs in named/BIND and httpd/Apache


    Always make a backup of the original file before trying this, I find this kind of thing when updating IPs etc.. to use a script. Where the old IP is "192.168.5.8" and the new IP is "10.10.5.8" sed -i s/192.168.5.8/10.10.5.8/g testdomain.org.db The -i with sed means "inline" meaning we edit the file directly, but without the -i we could just use >and output the results to another file or do whatever else we wanted.........
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