Need advice on output redirection

mnzahra · 11-18-2009, 12:39 PM

Just getting confused doing a lab for my linux class. Need help for the following;

Run the command 'mkdir old' and redirect any error messages into the file 'errors'.

I've tried a bunch of different combination and none of them work for some reason. Thanks a lot in advance.

kdelover · 11-18-2009, 12:40 PM

hi,

please use proper title for your message,and secondly this is your classwork,search for it and do it yourself :-) All i can tell you is look for redirectors in unix/linux.The answer to your question was in your Question

.Mention what all options you tried

EricTRA · 11-18-2009, 12:43 PM

Hello and welcome to LinuxQuestions,

First of all you'll have to change the title of your thread since this isn't drawing attention to it, on the contrary. Second, post what you've tried and what errors you got. And last but not least, read the man page for mkdir

Code:

man mkdir

and do some Googling on output redirection in Linux (turns up this)

Kind regards,

Eric

mnzahra · 11-18-2009, 12:49 PM

I've tried
mkdir old | 2>errors
mkdir old | cat 2>errors

I'm not even sure if I'm supposed to be piping it. Assuming that's right since it says run the command mkdir old and then redirect error messages into a file named errors.
And yeah, I know it's my classwork. I said that in my first post.

I'm not too sure how to change the name of the thread. I'll be more descriptive next time. Thanks.

EricTRA · 11-18-2009, 12:55 PM

Have a look at the link I posted about redirection. Compare the example(s) in that document to your structure. I'm sure you'll see the error. Since it is your homework, I'm not going to do it for you but this should get you in the right direction.

Tip: Read about the difference between piping and redirecting output.

Kind regards,

Eric

mnzahra · 11-18-2009, 01:01 PM

Thanks a lot. Appreciate the help.

Didn't need to pipe. The command mkdir old 2>errors worked just fine.

mrrangerman · 11-18-2009, 01:11 PM

Quote:

mnzahra

Thanks a lot. Appreciate the help.

Didn't need to pipe. The command mkdir old 2>errors worked just fine.

In case you don't know, when you use only one > to redirect the output, each time you run the command a single > will overwrite the existing file. If you want to append to the file use two >>

EricTRA · 11-18-2009, 01:14 PM

Quote:

Originally Posted by mnzahra

Thanks a lot. Appreciate the help.

Didn't need to pipe. The command mkdir old 2>errors worked just fine.

Good for you, you figured it out. First point won, on to the next one. Just think logically and read a lot (Google even more

)

Kind regards,

Eric

mnzahra · 11-18-2009, 01:46 PM

Yeah I did. I should have read the question more clearly. My prof has a really bad accent and I can't understand anything he says. Thanks

EricTRA · 11-18-2009, 01:53 PM

That's going to be pretty difficult when you have to take exam.

mnzahra · 11-18-2009, 01:59 PM

Well I've used the operating system before. This class is just introduction to Linux using the shell in Windows. So I should be fine as long as I do my work. The class average right now is 53% and I'm getting a 70

. I wouldn't be surprised if that is the highest mark in the class too.

EricTRA · 11-18-2009, 02:03 PM

Looks like your taking the lead in the classroom! Great! Keep it up!

chrism01 · 11-18-2009, 06:08 PM

I can recommend the following links for anyone in that kind of class
http://rute.2038bug.com/index.html.gz
http://tldp.org/LDP/Bash-Beginners-G...tml/index.html
http://www.tldp.org/LDP/abs/html/