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tail from one and match it in the other file

genius_not — Thu, 17 May 2012 00:32:25 GMT

Can someone help me to do the following

I have two files

file one

123456
789012
345678
901234
567890

file two

abcdef
ghklmn
opqrst
901234
567890
uvwxyz
123456

I would like to do tail on the last two lines from file one,
match the string in file two and then delete all lines above matching string, and send output to file three.

File three should look

uvwxyz
123456

My search is always based on the last two lines from file one, and that changes every day.

Thank you for your help.

---------- Post updated at 07:32 PM ---------- Previous update was at 07:29 PM ----------

And I forgot to mention, I searched forum and could not find any previos topics that could provide the solution to my issue.

Observing two logs at same time

KAREENA18 — Wed, 16 May 2012 16:55:19 GMT

Hi Folks,
I have an application at the backend and I have to check it logs at the thru putty but I have to go see two different logs at the same time and that is I am doing by opening two different instances of putty since both the logs are in different directory . Please advise is there any other way I can open the single instance of putty and see both the logs at the sametime..

Code:

cd /usr/local/abc.log

cd /var/tt/bce.log

Please advise.

Regarding the logs on putty

KAREENA18 — Wed, 16 May 2012 16:42:56 GMT

Hi Folks,
I have an application and I connect to unix box through putty , sometimes I Have to check the logs and for that I reached to particular directory and write

Code:

tail -f abc.log

Is there any better command so that these logs are dynamically go on increasing while I work on my application so please suggest any better command to observe the logs:confused:

---------- Post updated at 11:42 AM ---------- Previous update was at 11:36 AM ----------

Guys Please advise..!!

Filtering data -extracting specific lines

A-V — Wed, 16 May 2012 16:16:15 GMT

I have a table to data which one of the columns include string of text

from within that, I am searching to include few lines but not others

for example I want to to include some combination of word address such as (address.| address? |the address | your address) but not (ip address | email address | address bar )

in include the things that i want, i have used

Code:

egrep 'address| your address'

but now i have problems with things i dont want to include
i have used the

Code:

grep -v

but i dont know how to combine it so it will delete the things that i dont want

so simple how to delete lines that do have x or y or z

I am not sure whether i have to used grep, sed or awk either

cheers

how to know if i use "Red Hat Enterprise Linux" or "Red Hat Desktop" ?

ahmedamer12 — Wed, 16 May 2012 10:19:22 GMT

how to know if i use "Red Hat Enterprise Linux" or "Red Hat Desktop" ?

Oracle installation on cygwin

Uinx_addic — Wed, 16 May 2012 08:11:22 GMT

Can someone help in Oracle installation on cygwin

AWK help

preethgideon — Wed, 16 May 2012 05:36:16 GMT

Hi,
I have a file with the following data in a file :: File1

Code:

Name Credit

A       45

B       4

D       9

A       -3

B       -10

A       -3

Need the output as

Code:

Name  +ve Cr    -ve Cr

A        45            -6

B        4              -10

D        9               0

Got a command that adds up all the records but without segregating +ve and -ve values.

Code:

awk -F"," '{a[$2]+=$1}END{for (i in a) print i,a[i]}' file1

Please assist.

Thanks and Regards,
Gideon.

Rename multiple files, changing prefix, extension and dropping characters

bbmcg — Tue, 15 May 2012 18:55:08 GMT

I'm currently only able to perform some very basic functions, so hope this makes sense...

I have a set of about 27 files that need to be renamed from something like this:

Code:

000012ABCDEFGHIJ.XXX.YYY.ZZZ

000078KLMNO.XXX.YYY.ZZZ

000099PQ.XXX.YYY.ZZZ

to something like this:

Code:

newa012.abc

newa078.abc

newa099.abc

The file names currently all start with '0000', then a 2-digit value, then a name that can be anywhere from 2 to 10 characthers, then the same extension. They need to be changed to a new prefix + 0 + the existing 2 digit value, dropping the next 2 to 10 characters, and changing the extension on each file to the new one. All are case sensitive as indicated.

I was able to use one-liners to get to a file name like 'newa012PQ.abc', and am having the most trouble trying to understand how to drop the 'PQ' etc.

As I said I'm not familiar with much of this and see a lot of references to sed and awk etc. but short of copying code I'm not sure the meaning of, or messing with scripting that I've never touched before I figured I'd try here first.

Any help is appreciated!
Thanks

XML to TXT or CSV

A-V — Tue, 15 May 2012 17:54:22 GMT

Hi all,

I am new to unix and even newer to XML :wall:

I have a dataset which I need to work on and extract data from but I cant even see things. its a XML file which i need to analyse and return the results in xml as well but need to filter some of them like i would do with excel file so not sure what is the right thing to do

Can you please help me?

my data looks like this

Code:





  

    

      953b

      18:03

      this is an evidence regarding ...

    

    

      04bfa

      18:03

      we have seen those documents before 

    

     . 

     . 

     .

 

 

 .

 .

 .

it can look anything really
i dont really need the data to be normalized
i can have them separated by archive or simply having it all in one line

Thank you in advance for your help

A-V

Sending command from one terminal to another.

alireza6485 — Tue, 15 May 2012 17:34:31 GMT

Hello,
I am running a program in a terminal.
this program is just printing random words.
I can change the color of each word by entering the first character of the color(for example G for Green).
I want to write a bash code that runs in a different terminal and sends different characters to terminal 1 (the one showing the rectangle) to change the color automatically and constantly.

my word program is running in /dev/pts/1

i tried to do the following:

echo G > /dev/pts/1 , all it does is printing G in terminal 1. nothing happens to the color. how can I make it execute and change the color of the words?

Disk Usage

TH3M0Nk — Tue, 15 May 2012 14:29:56 GMT

Hi,

I have always felt problems using commands to check disk usage, or I should say I might not be using the commands properly.

dfspace and free are 2 most frequent command that I use, but the data that it echoes is not comprehandable atleast to me.:wall::wall::wall::wall::wall:

I want something like windows when you are inside a directory and type the command it should tell you how much memory.

Can some one highlight how to use disk usage.

Appreciate you help!

Unix concepts help

mdsaleemj — Tue, 15 May 2012 12:50:56 GMT

Team,
I am working in unix perl . i have come across scenarios where there are lots of unix concepts are being used.

For example, Handle, pipes, forking ,data sharing between processes,parallel processing and so on. I need some conceptual explanation about the unix system .

I have prior experience with unix . i have used various unix commands and shell scripting .

I tried to google for books/resources but it comes with C code and there is no conceptual discussion . i just see things related to kernal programming which is not scope.

Can you please suggest some resources/books where there is enough conceptual discussion like what exactly is pipe,handle and relation between the two , streams , how to create pipe and connect to forked process, etc..

i dont know C language...

Thanks..

Basic Question on perl use POSIX [SOLVED]

WongSifu — Mon, 14 May 2012 18:00:52 GMT

Hi guys,

I think this is a basic question. I'm not very familiar with this.

I'm trying to round a number up and round a number down. From what I have read this can be done using POSIX. I have tried to to use this, but i'm getting errors:

Code:



sub findGridBounds($$$%)

{

    use POSIX;

    my ($searchValue, $key, $gridTableKey, %gridTable) = @_;

    

    if (exists $gridTable{ $key })                                

    {

        my $inc = ($gridTable{$gridTableKey}[1] - $gridTable{$gridTableKey}[0]) / 501;

        my $mid = (($searchValue - $gridTable{$gridTableKey}[0]) / $inc) + 1;

        

        

        my $gridUpper = ceil($mid);

        my $gridLower = floor($mid);    

        print "Upper is: $gridUpper Lower is: $gridLower\n";



    }



}

I'm getting the following error:

Code:

Global symbol "$gridUpper" requires explicit package name

Global symbol "$gridLower" requires explicit package name

I'm not sure what i'm doing wrong. I'm thinking it has something to do with use POSIX, but i'm not sure.

Thanks guys!

---------- Post updated at 02:00 PM ---------- Previous update was at 12:10 PM ----------

Sorry for waiting ur time.... I just had a stupid syntax error... I'm just learning Perl. Please forgive me.

[Solved] Box with a new MAC address can't connect to the internet

tezarin — Mon, 14 May 2012 16:55:42 GMT

Hi,

i replaced one of my UNIX machines last week, the old box had an external IP address before. Everything is the same as the previous box and the only difference is the new one has a different MAC address (of course, since the mother boards are different). The problem is the new machine can't get on the internet and I was wondering if I someone could help me with that.

I checked the firewall rule on the main firewall machine but it doesn't have anything listed about that old box and its IP address. The box doesn't have a private address (192.x.x.x) and I'm not sure if/where the IT company which installed that for me long ago had the previous MAC address added somewhere.

I assigned the same IP to this new box, so I assume everything should work but it cannot connect to the internet.

Can someone please help me with this?

thanks

Auditd (How to disable)

HiphopTech — Mon, 14 May 2012 13:30:16 GMT

I'm running CentOS 5.x and want to disable this daemon as it's crashing my server daily!

I didn't install that and don't know why it's started magically for some reason.

Please enlighten me to the answer to this question, I've read the man pages on this and found something that stops it temporary. I'd like to permanently disable that.

It was saying originally the backlog limit was stopping my server but i upped the limit. Do i have to do something in the .conf file?

What should I do??? Help!

Thanks!!!:wall: