Linux introduction

I daily drive linux on my machines that are Windows from the manufacturer, however I have been without a daily Linux machine for some time. My new machine should be here soon.

Networking on CentOS

• While logged in as root, open nmtui using the cli, then select edit a connection
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• Select your NIC/adapter you want to use
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• In this case, we will use the address scheme given to us.
  • Our IP should be 10.0.5.3.
  • Our gateway should be our Pfsense firewall of .5.2
  • Our DNS server should be our AD server of .5.5.
  • We will also input a search domain of “yourname.local” (in this case, my name) to follow the same format as the other hosts on the network.

Commands

• cat: Searches through a file (such as a text file) and prints it's content as output in the terminal. Very useful when using SSH to replace an SSL certificate or editing a website. (Essentially converts standard input to output) Supports scrolling as well and can copy files too.

  • tac: displays content in reverse, same methodology as cat.

• head & tail: Each of these print in the terminal the first or last ten lines of a file, example being a text file. It functions like the cat command. You can change the amount of lines you want displayed using the -n# or -# option.

• grep: searches for a line with a specific string (or just specific text) within a file.

Poorly edited screenshot showing the commands being used