Command of the Day: dig

Going to end this week with the last DNS lookup tools released with BIND9. I’m sure there are other DNS lookup tools, and I know the Internet Systems Consortium has various other tools for you to use. Today we’re looking at dig, the first DNS lookup utility I ever used back in the day. Had now idea how it worked, kind of just copied and pasted code, but thought it was so cool to get an IP address of a website.
/usr/bin/cat ⏎ 

Command of the Day: nslookup

Continuing with the theme, I decided to continue the networking utilities by covering nslookup. I’ll finish this week off by covering dig and doing a comparison between the two. Just like host, nslookup was developed by the Internet Systems Consortium and is released with BIND9.
/usr/bin/cat ⏎ 

Command of the Day: host

As I continue down the path of trying to transition into InfoSec and continuing to study for my OSCP exam, I thought I’d take advantage of what I’m doing here to make this a study habit for myself. I thought about starting with a deep dive in and cover nc, but that seems to be really diving in the deep-end. I’ll start with host and see where this takes me.
/usr/bin/cat ⏎ 

Command of the Day: sort

Probably should have done this in opposite order, as a precursor to the uniq command. But who cares. If you’ve follwed yesterday’s post, then you’ve had some exposure to the sort command. Let’s dive into it and get some more use out of it!
/usr/bin/cat ⏎ 

Command of the Day: uniq

Finding uniquiness in a list! Remove duplicates, print duplicated, show only duplicates…the possibilities are endless! Well, actually there is a finite number of posibilities, but that involves combinatorics. And I’m too lazy for that right now. Anyway… uniq is pretty slick. Check it out!
/usr/bin/cat ⏎ 

Command of the Day: tail

If you saw yesterday’s Command of the Day about head then you prolly saw this coming.
/usr/bin/cat ⏎ 

Command of the Day: head

I think it’s safe to say that head was one of the first Unix commands I learned. Definitely up there with cd, ls, and rm. Although, I find myself using its converse utility tail much more often, digging into this reminded me how useful the head command actually is. Even if you’ve used this a million times before, I hope you can gain something out of this.
/usr/bin/cat ⏎ 

Command of the Day: wc

The wc command (or word-count), is another one of those gems that I find myself using more often in scripts than I expect. The initial release was in November of ‘71 (48 years ago!) and a release has been part of the Free Software Foundation since 1985. Perhaps even more amazing, is that it continues to be developed today! At this time of writing wc has had three commits directly related to it within the past year.
/usr/bin/cat ⏎