Linux (part 6) Copy Commands and crontab

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we kill it. We cat out

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my file three,

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This is a secret. Took the text from my file for and put it in my file three. So again in this case, and put on the same system all we've really done is done the copy command over the network

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on a local system, but moving at between different systems, you see how this might be useful. It is one way of transferring files. We will see additional ones, but it's certainly worth knowing. So let's see how about one more thing and then we'll call it a day on Lennox and move on. So let's see.

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How about

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Kron Tab So automating tasks. Everybody likes to automate tasks, right? Particularly if Europe investor and you want access to stick around forever. What if I wanted to check periodically whether

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there were any commands that needed to be run? Well, Lennox has a way of doing that. Windows does. Well, then Lennox uses something called Kron jobs. So if we go into the etc directory with CD,

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we do it l s and pipe that into grab and ask for Krahn.

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Well, show us Kron. So we look at Toronto

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basically our list of jobs. You can add something here

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that has default. Ones like you saw him here like

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daily hourly, monthly weekly,

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the things that are run on a regular basis.

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But we can add something as well. We can either add something to one of these. If I did KRON up daily,

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I could add something to be run here daily

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or if I needed

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be a bit more specific. I could add something here.

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So it is minute, hour,

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day of the months, months

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on day of the week.

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So

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here's one that's hourly. So it says on the 17th minute of every hour of every day of the month of every month of every day of the week. That makes sense, right? Hourly. Every 17 minutes,

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every hour it's going to run was ever in the hourly.

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Likewise, here, the next one down, we have

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daily,

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So let's see runs

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on the 25th minute of the sixth hour of every day. So, indeed, that's daily. What if I wanted to add my own here rather than added into one of the crawling Tubbs?

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What if I wanted to make it run every minute?

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Maybe That would be a little bit excessive.

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But what if I did?

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Then the user. I was a root and I want to run the command. That cat

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L V p 1234 Every minute is gonna run that gut

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good. Save that and should have do service pronto.

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Nervous crawling, restart. We start the scheduler. Then if we d'oh might have the wait a minute.

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The Apaches listening.

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Give it a second match. Ron

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Minute. Never seemed so.

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So it didn't work.

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I know you're there. It is.

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I really was a long minute, OK? We must have been, like in the middle of minutes or something. There it is. So it's listening on 1234

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So I really simple example there. In fact, let's get rid of it. Um,

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just keep stepping on itself.

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But that might be something we want to do for persistence. Maybe,

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but we can add things again. You can Adam into, like, the crawl, not dailies are lease month. These weeklies as well, of course, who wouldn't see it happened quite quickly and not really appropriate for a video to have to wait for an hour?

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No. And if we need more

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ability to change the times. We can do

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straight in schedule like that, like we just did against a kind of brief introduction to lay next. Um, certainly encouraged you to come more from your athletics and

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then, hopefully will be a Grand Lennox expert. Probably more so than me, even. But in general, it's just certainly worth knowing for pen testing because they got a lot of Europe in testing tools. Are one gonna be built into Callie Lennox? And many of them may not even have a window there Mac version for you to use. So if you aren't familiar with this platform, you