General :: Read File And Pipe To Grep

May 26, 2011

I'm storing a list of strings in a file and would like to read the file and pipe each line returned to grep which in turn searches a directory for files containing the string.However this is not returning any output.

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CentOS 5 :: Grep The Line And Pipe That Into The Sed?

Sep 22, 2010

I need to simply replace a 2 lines, or one and I'll run each command separately, in a eps file. I know I can grep the line and pipe that into the sed but I would like to keep this in a sed command. I can use sed /s and get it if I copy the section out of the file and paste it. Really just trying to rewrite the boundingbox coord's in eps files.

sed -i 's/%%BoundingBox: 00 00 88 487/%%BoundingBox: 24 315 288 487/g;s/%%HiResBoundingBox: 00 00 88 487/%%HiResBoundingBox: 26 315 288 487/g' someeps.eps

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General :: Windows Access The File From Ubuntu Got Read Only Even Though Have A Full Permission To Read, Write And Execute The File?

Feb 4, 2010

What are the possible problem when Windows access the file from Ubuntu got Read Only even though have a full permission to read, write and execute the file? Ubuntu to Ubuntu accessing the file there is no problem only Windows got a problem.

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Programming :: Read Unknown Data Length From Usb Pipe?

Aug 12, 2010

I've written a usb device driver and a program that sends and receives data over the bulk pipe. The read function sometimes returnsI'm reading an unknown amount of data. However, using a usb tracker I can see that the correct data is being sent.The error only occurs sometimes.I expect that the read function is told to read more data that it receives it would fail and return -1, however if this was the case then every read call would fail.

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General :: Nawk - Input From A Pipe And A File At The Same Time

Sep 16, 2010

I am tying to read a file in with nawk whilst trying to take input from a pipe. I've come across the getline option and no matter how hard I try, I can't figure out the correct syntax. What I want to do is to take some input from the pipe and make a comparison with all of the values in a file and print a match.

Code:

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General :: What Is Meaning That File Is Named Pipe (FIFO)?

Jul 12, 2011

What is a pipe? and why a file is a named pipe? I am just learning linux.

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Programming :: Input File - Grep Within Grep

Nov 22, 2010

I need to kind of grep within grep. My input file would be something like:

[Code]....

and I need to find the first occurrence of hello before MY PATTERN (hello 9008 in this case), so the output should be:

[Code]....

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General :: Feed Text To File Editor From Named Pipe

Apr 24, 2011

Does any one know how can i input text by reading from a named pipe to any popular GUI based text editor?

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General :: Use Grep, Cut, Or Awk To Get An IP From A File?

Feb 3, 2010

I have a file which contains a line like this:SERVER=10.205.110.19 How can I cut out the IP and assign it to a variable?

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General :: Grep The Contents Of A File With Another File?

Sep 25, 2010

someone once told me that use can pass a file to grep and use that to search the contents of another file. if that is the case I'm not entirely sure why the following isn't working for me.

Code:

[root@LCENT01:~]#grep -i id_rsa.pub .ssh/authorized_keys
[root@LCENT01:~]#cat id_rsa.pub >> .ssh/authorized_keys
[root@LCENT01:~]#grep -i id_rsa.pub .ssh/authorized_keys

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General :: Grep Or Sed Or Awk For File Manipulation?

Dec 7, 2010

Let me *try* and explain what I'm trying to do, and keep in mind aside from a little command line stuff I'm a beginner to any of what I'm asking about.

I have a directory structure something like this:

Code:

/usr/local/chatlogs/
webserver1/
1.chatlog
2.chatlog

[Code]....

So that whatever was captured in the () in the first part of the statement would be used in the 1 in the back part of the statement for every n.chatlog that might be in any of the /webserver directories at that time.

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General :: Grep 2 Items In A File?

Dec 31, 2010

I have collection my routers configuration through rancid. Now i want to do the following,

Display all the files that contain the following words

C1841 AND HWIC-4ESW

I want to display all the files that contains both these words.

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General :: Search For A String In A Php File Using `grep`?

Jan 19, 2010

I am searching for Class declaration on a site with hundreds of PHP files, how can I do this in the current folder and subfolders using GREP?

I tested cding to the folder and then something like

grep -r 'class MyClass' *.php

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General :: Grep And Store Two Lines In Other File

Feb 16, 2011

I have following contents

I want to grep "#2" and want the output as

How to using shell script?

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General :: How To Grep Negative Number In File?

Mar 4, 2010

I wanted to grep the line in a file starts with -1.000000e+00.

Tried grep "-1.000000e+00" *, got error "grep: invalid option --".
Neither of the following works:
grep "-1.000000e00" *
grep "1.000000e00" *

How do I grep a negative number with scientific notation?

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General :: Ls: Cannot Access Grep: No Such File Or Directory

Mar 16, 2010

I ran into a bit of trouble making a bash script. (Desktop is a directory, and I try to get it's modification date)

Code:

lamp:~# cmd='ls -l Desktop | grep -o "....-..-.. ..:.."'
lamp:~# $cmd
ls: cannot access |: No such file or directory
ls: cannot access grep: No such file or directory

[code]....

When I type in the command directly, without using an inbetween variable, it works fine.

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General :: Using Grep With Pattern File And PCRE

Sep 25, 2010

I would like to write a newline delimeted rules file using PCREs for use with the grep command. Grep has the option -f to obtain the search pattern from a file, and option -P to search using PCREs. However, these two options do not work together. The -f option only seems to work with fixed string rules.A friend previously helped me get around this limitation somehow, but I can't remember how he did it. I also would like the ability to add comments at the end of each rule in the file.

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General :: Able To Grep For Names In A File That Contain Foo And Not BlahhFoo?

Feb 1, 2010

I have a number of files:FooBlahhFooI only want to be able to grep for names in a file that contain Foo and not BlahhFoo. However I am not able to pull only those files away. How can this bee done. My grep/zgrep knowledge only goes this far at this point. I'm still learning but I'm stuck on how to make my arguments more precise zgrep 'Foo' SomeFileIMade.gz > /home/user/FOOFILE

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General :: Grep Multiple Lines From A Text File

Jun 17, 2009

I have a list of words that I want to grep in many files to see which ones have it and which ones dont. in the text file I have all the words listed line by line, ex: list.txt:

check
try this
word1
word2
open space
list ..

I want to grep each line one by one. like I want it to

grep "check" *.log
grep "try this" *.log
grep "word1" *.log .. etc how can I do this?

and maybe write the output to a file.

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General :: Grep Contents Of File On Remote Server?

Sep 24, 2010

I am attempting to grep the contents of a key file I have SCP'd to a remote server. I am able to cat it:

Code:
[bluethundr@LBSD2:~]$:ssh root@sum1 cat /root/id_rsa.pub
root@lcent01.summitnjhome.com's password:

[code]...

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Programming :: Handle A Broken Pipe Exception (SIGPIPE) In FIFO Pipe?

Mar 2, 2011

I've written a simple server in linux used fork to create a FIFO pipe.The server create two FIFO pipe.One for server read data from client and write data to client.Then another pipe for client read data from server and write data to server.When the server read data from a client used server-pipe and then write data to client.But ,if the client no read open the pipe,the server side write will be crashed because of a broken-pipe SIGPIPE. How to check whether the read side is opened?Or,how to catch the SIGPIPE,and then my server will still execute on,not crashed!!

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General :: Grep All Values Other Than Encrypted Password From /etc/shadow File?

Jan 14, 2010

I would like to grep all values other than encrypted password from /etc/shadow fileFor example,each line consists of 8 fields separated with :/The only thing that I want not to print out is the contents between first : and second : (encrypted password)

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General :: Multiple Grep Outputs Appended To Single Row Of CSV File?

Sep 12, 2010

how to update a series of values from multiple grep commands outputs to be appended to a single row of a csv file? Work on a linux envir. The values from grep output will be numeric values.

Output sold look like:

1,3,4,5,7,0,5

Each of these values will be odtained from multiple grep commands piped with wc -l Is it possible to update a single row of a csv file if so pleas ehelp me with the command to be used to redirect the output into the csv file

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General :: Using Grep To Remove Line And Write Back To Same File?

Feb 10, 2010

remove a line starting with specific word with grep. Here is what I found

grep -v '^cc$' data.txt

Here I remove all lines with on 'cc' in that line. But I want the result write back to data.txt

I try several ways

grep -v '^cc$' data.txt > output.txt # works but to another file
echo `grep -v '^cc$' data.txt` > data.txt # didn't work, all carets gone, become one line
grep -v '^cc$' data.txt > data.txt # data.txt is empty after running this

How can I save the result of grep to the input file?

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Ubuntu Servers :: Grep Gzip Segfault - Not Boot Apart From In Read-only Mode

Mar 28, 2010

I have an interesting issue Ubuntu Server 8.04, The server has been running for quite a while (not designed or put together by me) but recently it has started segfualting and now will not boot apart from in read-only mode. I see the following errors in dmesg.

[Code]....

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General :: How To Make Grep To Search A Pattern In Only Specific File Type?

Mar 6, 2010

To search a string pattern in all files in a directory and subdirectories, I am using;

Code:
grep -R "myclass::my-func(" mydirectory/
Now I want grep, to search in only specific file types say *.cc. Please help me. I have read manual of grep, but could not deduce any hint.
Best Regards.

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General :: Grep - Manipulating Large Text File Full Of Records

Nov 26, 2010

I'm trying to manipulate a large text file full of records (metadata - one complete record per line). I need to delete every line on which certain words appear - there are five different words, all pretty simple all-caps strings with occasional whitespace. I tried using grep -v, which worked a treat, but only string-by-string. Ideally I'd like to run this as grep -v -f, where the file targeted by the -f contains the strings I need to match in order to delete the lines they're in.

i.e. grep -v -f filecontainingSTRINGS.txt targetfile.txt > outputfile.txt

When I try this, however, I don't get any matches - or more specifically, no changes are made in the output file. It works fine if there's only one string in filecontainingSTRINGS, but it doesn't work if there's more than one (I'm using newline as the delimiter). (Also my machine doesn't recognise /usr/xpg4/bin/grep - no idea what that's all about!)

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General :: Sed/awk/grep Search For Number String Of Variable Length In Text File?

Jan 19, 2010

I need to search a text file for a string of numbers which are different lengths, and always are between number=" and " like:

number="1234567890"
number="22390"

I need to grab those numbers and pipe each one to a line in a file. I've already tried something with awk and that didn't seem to work.

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Networking :: PING - Pipe 2 Versus Pipe 3

Apr 10, 2009

I'm doing ping between 2 RH servers through a VPN site2site tunnel and in some times I got in the result pipe 2 and another pipe 3 as I mark it in blue color below.

e.g.

64 bytes from 192.168.1.10: icmp_seq=0 ttl=128 time=0.229 ms
64 bytes from 192.168.1.10: icmp_seq=1 ttl=128 time=0.287 ms
64 bytes from 192.168.1.10: icmp_seq=2 ttl=128 time=0.278 ms

[code]....

What's the difference between pipe 2 and pipe 3 and what's the meaning of it?

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General :: Read .gz File Direct On Shell/terminal Without Decompressing The File?

Dec 9, 2008

How can I read .gz file direct on shell/terminal without decompressing the file?
satimis

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