Programming :: Append Variable String In A Specific Line?

Jun 8, 2010

I want to append a variable string to the end of a specific line. not like append the same string to each line. like in my file i have 4 columns, i want to add a string in 5th column in some fixed row.

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Programming :: How To Append A String To A Next Line In Perl

Apr 9, 2010

I have a requirement like this..this just a sample script...

Code:

when i run this scipt...

Code:

Code:

It is appended in the same line...

I want it to be added to the next line.....

I want to do this by explitly using the filehandles in perl....and not with redirection operators in shell.

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Programming :: Sed Append To End Of A Specific Line?

Jan 29, 2011

What I am trying to achive is the editing of /etc/ssh/sshd_config I have the line

Code: AllowUsers usera userb

And I want to be able to append to the end of this line from a bash script.I have muddled together from other sites and got the following:-

Code: sed -e "s/^AllowUsers/� userc/" -i /etc/ssh/sshd_config

But this appears to add userc directly after AllowUsers and not after userb

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Programming :: Append To String In Awk?

Sep 20, 2009

I'm having problems completing my school exercises with awk.

Heres the desired outcome:

Code:

./my_awk 2
ACG GAG ATT AGG AGG ATC CCA CCA
CAC AGG ACG GAG ATT AGG AGG ATC

So it generates data in group of threes, 8 groups per row and prints it. My problem is that I can't seem to get awk to append stuff to string so I could print it nicely to screen. It just prints empty lines per the parameter given to it.

Heres my code so far:

Code:

#!/bin/sh
awk -v rows=$1 '
BEGIN {

[code]....

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Programming :: Using Bash To Append A String To Array?

May 19, 2011

I have the following function that does not iterate through the array I want to be able to do some manipulation on each element in the array[@].it appears the below array has only one item in the array whereas i want the array to have 3 items hence the loop three times printing the message Any ideas why this is not happening ?

function foo() {
name =$1
array=( "$2" )

[code]...

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Programming :: List All The Files That Don't Contain Pattern1 And Append A New String?

Mar 24, 2011

How to list all the files that don't contain pattern1 and append a new line (pattern1) to those files before pattern2 only once.

pattern1 = /var/script/showMessage.sh
pattern2 = ;;

Code:
grep -c 'pattern1' /var/script/*_cam* | grep :0 | add pattern1 before pattern2 in each file loacted before.

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Programming :: Make A New Variable With The String From The Old Variable Btut Without Any Plus Sign?

Apr 7, 2010

my script has a variable which comes in the form +00.00 +0.00 -00.00 or -0.00 (the numbers can be any in that form) for any that have a + symbol I need to remove the +, but if it has a - symbol it needs to stay.

i need to make a new variable with the string from the old variable btut without any plus sign. I have tried a lot of different ways with no success, each thing I tried either left the + or removed the entire string. I think this should work but doesn't

foo=+12.40
bar=${foo#+}

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Programming :: C - Put A Specific Arbitrary Part Of A String Into It's Own String?

Apr 18, 2010

So if I'm given a location of a file like:

How can I just take the type of the file at the end? I know I can use strrchr() for a period to get the pointer to the period just before file type. Is there a build in string function that will just take the rest of the string from a certain point on forward in the string? I know it wouldn't be much work to make it myself, but I figured I would find out if it already existed before doing it.

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Programming :: Append A / At The End Of The Line?

Aug 10, 2010

The s means substitute
The $ in this particular regex (regular expression) means end of the line.
The ; is what you're subbing. This works fine and well, but what if you want to append a / at the end of the line?

sed 's/$///' filename doesn't work.

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Programming :: Pthread - Take String From The Command Line And Creates A Thread To Print The String

May 3, 2011

I've been trying to understand pthread in C a little better. So I made a simple program that takes in a string from the command line and creates a thread to print the string. I've looked online and copied the basic concepts but there are something things I'm confused about. The programs works just fine, but I have questions. Here's what I have so far.

[Code]....

One thing I'd like to know is why the 3rd argument in the pthread_create function which is my SendMessage function needs to be typecasted to a void pointer and then send the address of the function. Also as for the 4th argument, I would see typecasting to void pointer in some of the pthread examples I saw online, but in my case I'm passing a char pointer, would this be correct? In which case would I ever want to pass a void pointer?

Do I need a pthread_exit(NULL) in my main and in the SendMessage function? If so, why? I added the sleep() function so that I could let the pthread_exit function in my SendMessage function execute first. I simply saw that the online examples on pthread had pthread_exit() in both locations.

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Programming :: How To Append Text To Second Line Of File?

Nov 6, 2010

Say I have a text file like:
Code:
1
3
4
How would I use ksh to put the number '2' into the second line of that file?Okay it's not bash, it's ksh because this computer is OpenBSD

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Programming :: Using Sed Replace Line Containing Particular String By A Single String?

Oct 16, 2010

I have a set of lines as ahown below:

Leon went to school
Leon came back from school..
Leon had dinner...

I have to replace the line containing "dinner" by a single string LUNCH...

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Programming :: Copy And Replacing Specific Line From File1 To File2 Line By Line

Mar 22, 2011

I have two files, file1.traj and file2.traj. Both these files contain identical data and the data are arranged in same format in them. The first line of both files is a comment.

At line 7843 of both files there is a cartesian coordinate X, Y and Z ( three digits ). And at line 15685 there is another three digits. The number of lines in between two cartesian coordinates are 7841. And there are few hundreds of thousands of lines in a file.

What I need to do is copy the X Y Z coordinate (three digits) from file1.traj at line 7843 and paste into file2.traj at the same line number as in file1.traj. The next line will be 15685 from file1.traj and replace at line 15685 at file2.traj. And I dont want other lines (data) in file2.traj get altered. This sequence shall be going on until the end of the file. Means copy and substitude the selected lines from file1.traj into file2.traj.

I tried to use paste command but I cant do for specified line alone.

Here i showed the data format in the file. I used the line number for clarity purpose.

Code:

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Programming :: [Java] Append Something To Each Line In A Text File?

Apr 15, 2009

I am thinking of appending something to each line in a text file with Java. I prefer not write a new file with content appended from the old one.That 'something' would probably be Time Stamp when the file is created (which is same for each line).I am not sure Java provide some easy way for it or not

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Programming :: Insert Line Using Sed Or Awk At Line Using Line Number As Variable

Jul 25, 2011

I want to insert a line at a particular line number using sed or awk. where line number is not fixed and is in form of variable.

I want to use variable in sed or awk command.I tried something like below, but no luck.

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Programming :: Change String Variable In Awk?

Nov 26, 2010

How to change string variable in awk? for example, I parse with awk script text file named some_name_with_extension.txt

I want to print only some_name in my script

Code:
....
varCompName = FILENAME
print varCompName

How to put not all symbols from FILENAME to variable?

[Code].....

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Programming :: Replace Specific Character After Specific Line By Awk?

Jul 19, 2010

I want to replace specific character in a file after every specific line. example as follows.

O 000000000000000000
A 111111111111111111
C 222222222222222222

[code]...

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Programming :: Bash Concatenating String To Variable ?

Jan 18, 2011

I have a program that loops over each word in a sentence. I need to append a constant to the beginning and end of each word. It works up until the last word on the line.

Code:

Output:

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Programming :: BASH - If Variable -eq String Not Working ?

Jan 24, 2010

Here is the code:

Code:

How ever when I run this script I get the following error

Quote:

I just don't get it, I have racked my brain trying to figure out every combination of how I should write this if statement and I can't get it to work.

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Programming :: Pass A Path As A String To A Variable?

Apr 17, 2009

I'm trying to pass a path as a string to an array, but its evaluating it as a command instead. I want to take the literal string "/mnt/accounts/user/temp/*.jpg" and assign it to an array{1}, but when i echo the array variable, it displays it as

pic1.jpg
pic2.jpg
pic3.jpg

[code]....

I just want it to be the actual text "/mnt/accounts/user/temp/*.jpg" which i will be combining with other text to create a longer path elsewhere in the code.

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Programming :: HOSTNAME Variable Is Being An Empty String

May 19, 2011

The script produces 2 empty lines and I don't know why.

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Programming :: Need To Delete A Specific String

Aug 27, 2010

These must a be a question you received a lot, but I couldn't find a similar thread! It's a simple question.
I need to delete a specific string from a file. For example the specific numbers "3456" from a file. I've tried with the tr comand, using
Code:
tr -d '3456' file,
but it also deleted whichever ocurrence of 3,4,5,6 from my file. Should I use a regular expression?

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Programming :: Bash Thinks String Variable Is A Numeric One

Jul 7, 2011

Bash 3.1.7

Code:

Code:

Code:

I think read A1 A2 makes A1, A2 string variables. Then, when A2 gets the value 01, '01' should be a string. But for some reason bash takes it as numeric. I know there are no types in bash.

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Programming :: Include A String Variable In A Regex (Perl)

Jan 9, 2010

how do you include a string variable as part of a regex in Perl?

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Programming :: Use AWK To Search For A Specific String Inside Html?

Jan 26, 2010

how to search for a specific string of text inside an html document. I then want to cut out that specific data that the field or string contains. I want to do a shellscript that makes this function automaticly.

For example:

#
#Here i want to find the field "town" inside the html/java and then cut #out the town name from it and paste that to an file.
#
#

[Code].....

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Programming :: Text On A Specific Line At The End Of A Line?

Jul 26, 2010

I'm trying to add text to a file for a specific group of users, I'll need to do examples as I can't think of an easy way of explaining, my file is like this:

Code:

users{
user1
user2

[code]....

At the present my code lists all the available groups, how would I add a user to a specified group? (e.g add "members user3") to the end of group 1 for example. So the code ends up like this

Code:

members user2,user3

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Programming :: Bash - Calling A Specific Variable Based On User Input?

May 3, 2011

I'm trying to call a specific variable based on a user selection. For example:

Code: Select a file:

[1] foo.tar
[2] bar.tar

Enter a selection: I have already coded each possible selection to have its own variable. If the user selects 2 I need to select $SELECTED_TAR2, or if they select 1 I need to select $SELECTED_TAR1 and then do something like this behind the scenes:

Code: cp /home/user/$SELECTED_TAR2 /home/user/backup/$SELECTED_TAR2

I was thinking something like this:

Code: echo "Enter a selection: "
read -e SELECTED_NUMBER
cp /home/user/$SELECTED_TAR$SELECTED_NUMBER /home/user/backup

[code]....

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Programming :: Add String On The Beginning And End Of The Line ?

Aug 3, 2010

I need to output of a script to a file with tags.

I'm trying sed and was able to put a tag on the end of the line

Code:

Output is

Quote:

What I need to have is

Quote:

I'm thinking of I redirect my first sed command to a file and then use sed again to put <group> at the beginning of the line. My problem is how to put <group> to all beginning of the string.

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Programming :: Delete Line In File Matching String?

Jan 26, 2010

Quote:Originally Posted by topcatI would like to know how i can write a shell script to delete a line if a particular pattern exists?E.g. I have a text file with multiple lines. Say 1000s. in the following pattern.

username@email.com:149.0.3.4:1
username1@email.com:149.0.3.4:1
username1@email.net:149.0.3.4:1
username1@email.edu:149.0.3.4:1

If the patternusername@email.com exists then the line "username@email.com:149.0.3.4:1 should be deleted from the file.I have a very similar question but I need to delete one line in a file which matches one very precise instance of a string only. Let's assume I have a file composed of thousands of lines and let's call the file chap-secrets. Let's take the following sample entries:

Code:
#USERNAME SERVER PASSWORD IP
pp pptpd blahblah *

[code]....

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Programming :: Read A Blank Line Ie A String Of Length 0?

Apr 19, 2010

in gcc how to read a blank line ie a string of length 0.my code:

Code:
#include<stdio.h>
#include<string.h>

[code]...

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