Making heads and tails of text files...

By default, the head and tail commands each give an output of ten lines. That's not bad, and for many things it is all that we need. But there are times that it would be nice to get more or less from these commands.

To get head to give us a different number of lines, just add the number of lines that you wish to be returned following a hyphen, as it if were a normal flag. Here is an example to return the top five lines of a file.

# head -5 /var/log/messages

Strangely, and I have no explanation for this, tail works similarly but not exactly the same. The tail command needs a "-n" flag followed by the number of lines that we wish to extract. So if we wanted to see the final eighteen lines of a text file we would do it like so:

# tail -n 18 /var/log/messages

@DustinB3403 said in Linux: Aliases:

@johnhooks said in Linux: Aliases:

@DustinB3403 said in Linux: Aliases:

You know just because I hate having to type "clear" every time... every linux system I have is getting the "cls" alias!

You can just do ctrl+l

And have to remember yet another keyboard shortcut?!

ctrl + l (L) is pretty universal for clear screen in the POSIX-compliant world, it's really about learning standard short cuts, like ctrl + k is delete line, ctrl + c is SIGINT, hell the latter even works in MSDOS and PowerShell.

@thwr said in Linux: File Colors:

@thwr said in Linux: File Colors:

@guyinpv said in Linux: File Colors:

@thwr said in Linux: File Colors:

@guyinpv said in Linux: File Colors:

PuTTY, CentOS.
I also use Consolas, 14pt text.

Fonts are a client-side thing, the data is plain ASCII/UTF8/whatever

Didn't say it wasn't.
I mentioned PuTTY in Windows. I particularly like Consolas, I also use it for programming.

Didn't mean to offend you, just wanted to clarify. Not everyone here is a Linux guru 😉

OMG, that sounds very SAM-ish...

Here you go.

0_1473461608944_sandwich.jpg

OH, you said SAM-ish, whoops.

@Mogrith Glad that someone is!! LOL. Thanks, it's fixed.

Fixed

@BRRABill said in Accessing a Linux Server via SSH:

@scottalanmiller said

The default of what is to copy, paste and hit return?

PUTTY.

Be default when you right click something to copy, it copies it and pastes it and then hits return.

I guess perhaps just highlighting it copies it? I like the Windows method.

No it does not. I thought maybe you were thinking this but did not want to imply it. That's a misunderstanding of what is happening. It only does that IF your Windows environment and your actions are copying a carriage return into the clipboard (which Windows does by default.) This has nothing to do with PuTTY and is all about your Windows desktop AND it only does this if YOU make it happen, it does not do that for the rest of us. We don't copy the carriage return into the clipboard unless we want it. Windows makes this easy to control as a feature, but it is an invisible feature of the Windows environment so if you are not a Windows power user, you might not be aware that there is an interface to it that you are misusing.

PuTTY simply does what Windows tells it to do, PuTTY has no default behaviour like you are imagining.

@scottalanmiller said in Linux: The Lay of the Land and the Filesystem Hierarchy Standard:

@BRRABill said in Linux: The Lay of the Land and the Filesystem Hierarchy Standard:

So to wrap this question up...

Anything to be shared with users not on the local machine should be stored in /var and probably /var/exports

So a file structure such as

/var/exports/HRdata
/var/exports/XObackups
/var/exports/userhomefolders
/var/exports/sharedDOCS

Would be what you are expecting to see on a Linux file server....?

Yes, that would be a very good approach.

Thanks!

Hope it was a good question.

Had a spare laptop laying around. Installing CentOS now. Also planning on installing NextCloud here soon as well. Creating a repository/shared calendar for the family with this machine.

Open source has been a very important tool in the operation of many cheaper systems, by cheaper, I mean company's who want the best, for the least. Been there done that. But, we used a Zip program that had a 4gb limitation, probably due to the limitations in place at the time of writing/modification. There were no warnings on its help, or on user documentation. A 6gb structure was not being zipped, Music mostly ITunes. Sure no problem there, just the Owners Son. Documentation, patching after the fact? What of limitations as above? Backup's serve well but would not have been needed if we could have stored the dir in a non local storage device. Now testing is as thorough as you can get without knowing all sources modified since the first code was documented, and as above some documentation may not have been known by the author, whoever that might have been. Managers hate not having someone to scream at on the phone if some part of what they have used does not perform as advertised, HA. But still open source fills a void, one that some 'Licensed' code cannot fill. As long as this is true, pioneers will navigate through the code until the 'perfect' fit is found.

Added ZFS page: https://mangolassi.it/topic/19669

@scottalanmiller said:

(Windows 10 is kernel NT 6.4.)

Windows 10 is kernel version 10. 😉 They changed it after one of the major consumer previews were released.

0_1450808009008_Capture.JPG

+1 for primary application platform on Ubuntu.

If you mean what I think you mean, I use Centos for General server stuff, basically a server that can handle anything or can be more than 1 thing, however for Ubuntu and cause of the snaps, I use Ubuntu for specific roles like :

File server
Or
RockChat server

For specific purpose roles.