General :: Using Sed To Send A Variable And Replace?
Oct 6, 2010I can't figure out the exact sed to make this work. I've installed CentOS and am trying to pass variables to a network-config file.
variables:
$ipAddress
$netmask
[code]...
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General :: Text Manipulation Find / Replace Variable Efficiency?
Aug 27, 2010What I have works, but wondering what is the 'right' way to replace the digits with the letters given in this loop? somehow use a case or multiple sed? i thought of a multiple sed or a case but couldn't get it to work
Code:
# ...
bcv=$(echo $line | awk -F" " '{ print $1 }' | sed 's/1/q/g;s/2/w/g;s/3/e/g') # and so on
Code:
while read line
do
bcv=$(echo $line | awk -F" " '{ print $1 }')
if [ $bcv == "" ]
[code].....
Fedora :: Replace A Certain Line Of A File With A Variable?
Nov 26, 2009I want to replace a certain line of a file, my bash script looks like:
#!/bin/sh
sentence="if [ -e /home/inf/Download/$playlist ]"
sed '4c
$sentence' oldfile > newfile
mv -f newfile oldfile
But the variable $sentence can not be identified in ' ' . And also you can see I just want to update the old file. But the sed command can not save the file for me ,so I need to write them to a new file and over write the new file .
Programming :: Make Bash Replace The Value Of A Variable?
Apr 18, 2009I have a program I am writing where I have a for loop and I want to make it substitute the variable twice like:
for ((i=0;i<5;i++)) do
echo $"$i"
done
[code]...
Programming :: Sed Script - Searching For Text Within File / Replace With Variable
Feb 25, 2011Code:
#!/bin/bash
VARR=`cat /proc/asound/cards | grep HDMI | cut -c 1-2`
VARX="defaults.ctl.card $VARR"
VARY="defaults.pcm.card $VARR"
FILE1="alsa"
FILE2="alsa.new"
echo $VARX
echo $VARY
sed "s/defaults.ctl.card*/'$VARX'/g" $FILE1 > $FILE2
This is what I have right now. Well, I thought I knew sed, and apparently I don't... I tried writing this for someone else, and this has given me trouble, so since the user pretty much figured it out on his own, here it goes.
Say VARR=1, so VARX and VARY contain the above text, appended by 1.
What I am trying to do is replace the text "defaults.ctl.card 0" by VARX and "defaults.pcm.card 0" by VARY. The contents of FILE1 is the file being used to search for both text fields, and FILE2 is the output file. I tried using single quotes, double quotes, and a mixture of both, and no go whatsoever. So my question... What is the proper way of searching for text within a file and replacing with a variable?
Programming :: Send Block Device Name To Bash Variable?
Feb 13, 2009I'm setting up a machine that's going to be used to test randomly connected tape drives one at a time, and as such, I'm writing the test routine using mt in a bash script, for user-friendliness. The problem is the block device name changes on occasion as tape drives are swapped out and busses are rescanned, so I can't "hard code" a block name into the script.
I know programs like lsscsi and hwinfo will give you block device names as part of their output, but I can't seem to grep anything in such a way as to have the final output be just the block name (ie /dev/st2, or optimally 'st2'), so that I can just have the script read said output, and drop it into the necessary variable.
Programming :: Passing A Variable At Compile Time - Send POSITION
Jan 14, 2010I want pass a variable at compile time.
for example in x.c
int global_var = POSITION;
How can I send this POSITION at compile time. ie like # make POSITION=10 Is it possible?
General :: Replace Function Replace More Than One Word With The Same Character(s)?
Apr 23, 2011Can the Replace function replace more than one word with the same character(s)?
Also, do you know how to access the plugins provided by the gedit-plugins package?
Programming :: Perl: Find Variable Text Between Keywords And Replace W/ "term_<variable_text>_term"?
Jul 12, 2010I am trying to write a Perl script that can open a file, find text that appears between two identifying strings (for now, "start" and "end"), then modify that text by enclosing it between "term_" and "_term" . Since the identified strings vary, the replacement string becomes "term_$1_term". From looking at other threads in this forum I've been able to get as far as spitting out the modified terms using the following code:
open FILE, "start2.txt" || die ("Could not open file <br> $!");
$text = <FILE>;
while ($text=~ s/start (.*?) end//) {
[code]....
The problem is how to get "term_$1_term" into the file in the same while loop, which I'm guessing would be some of variant of "$text=~ s/$1/$term/;" (which doesn't work as it stands).
General :: Assign Local Variable Values To Global Variable?
Feb 17, 2011how to assign a local variable value to a global variable....
View 2 Replies View RelatedGeneral :: Create An Environment Variable With The PRINTER Variable?
Apr 16, 2011I am supposed to create an environment variable with the PRINTER variable, which should resolve to the word sales. Would the command be like this?: env PRINTER - NAME=SALES (is this the command to create that variable with resolving the word sales to it?)
View 3 Replies View RelatedGeneral :: Use The Value Of One Variable To Generate A Name For Another Variable?
Jul 25, 2010can i use the value of one variable to generate a name for another variable? for example i want to use the counter from a "do while" loop to name and define a variable each time the loop executes. for example
objectnames1=`ls -a`
objectnames2=`ls -a`
etc.
i don't have a script yet but each time through the loop i intend to cd to a particular directory and then define a variable containing a list of each object in that directory as values. for the rest of the script to work, each variable generated has to be unique, and i can't think of a good way to accomplish this.
if using a value from one variable to name another isn't possible, can anyone think of a more elegant solution? i know limited syntax but i'm willing to read up...
General :: Sed Substitution Of Variable With A Variable?
Dec 27, 2010I am trying to alter the character position of residue numbers above 999 in a pdb file.The following script is an attempt to:1) Get all unique pdb residue numbers (in column 5) using awk and assign it to a variable i.2) Loop through all the values in $i and if it is greater than 999, shift that number one character to the right using sed.However, the script only manages to alter the final residue numberCould anyone please advise how I can loop through all values in $i and shift it one character to the right?
#!/bin/bash
# Script to alter position of residue number in pdb file for resid above 999
i=$(awk '{print $5}' wt-test.pdb | uniq)
[code]...
General :: Send The Output Of Send Command To A File?
Jan 20, 2011in the middle of script, i need to send the output of (send command on line 8) to a file
#!/usr/bin/expect
spawn telnet 172.20.64.133
expect "ENTER USERNAM <"
[cod]....
i treid the below on line 8 :
1- send "show command;
" > logfile.txt : gives an error extra character after the "
2- logsave logfile.txt 'send "show command;
" ': error invalid command
3- i simply tried to send the output of the whole script to file logsave /home/logfile ./script : seems that logsave work under root only
4- ./script > logfile : the problem with this is that the output of echo or (read "enter your id") command will not be displayed on the screen (actually nothing will be displayed, i have to open the log file to see the output). is there any way to save the log of the "send" ? or to save the log of the complete script without hiding the output on the screen?
Programming :: Bash - Read Content Of File To Variable And Use This Variable In For Loop ?
Aug 21, 2009I'm trying to read content of file to variable and use this variable in for loop. The problem is, when I have c++ comment style in file - /*. Spaces in line are also interpreted as separated lines.
For example:
Code:
Changing $files to "$files" eliminate these problems but causes that whole content of variable is treated as one string (one execution of loop).
Programming :: Make A New Variable With The String From The Old Variable Btut Without Any Plus Sign?
Apr 7, 2010my 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#+}
Software :: Get Variable From Text File Into Bash Variable?
Jun 10, 2009I have a text file i that has a mailTo: NAME in it. In a bash script i need to extract NAME and put it in a $variable to use. How do i do this?
View 2 Replies View RelatedProgramming :: Search Within A Variable And Assign The Results To A New Variable?
Apr 25, 2011how I can search within a variable and assign the results to a new variable. I'll use the following as an example -
cars="Audi BMW Cadillac Chevy Dodge Ferrari Ford Mercedes"
list=`echo ${cars} | egrep -o '<A?+|<C+'`
with the echo command I get the following output assigned to list -
A
C
C
What I'd like to get for output is -
Audi
Cadillac
Chevy
how I could do this regardless of upper/lower case letters?
General :: Bash - HISTSIZE - Readonly Variable -bash - HISTFILESIZE - Readonly Variable
Dec 8, 2009On one of my servers I see this when I log in. What does this mean and how can I get it to go away? Everything seems to work fine, but none of my other machines give this error.
View 5 Replies View RelatedProgramming :: Assign Value Of C Variable To Shell Variable?
Apr 28, 2010included shell script inside c program, and i wanted to assign the value of c variable to shell variable..Can any one please suggest me how to do it?
View 8 Replies View RelatedProgramming :: Assignment To A Variable Variable?
Mar 17, 2011This loop is part of a bash script which takes multiple arguments.
Code:
for ((i=1;i<=$number;++i)) ; do
offset=$(($i+5))
[code]...
Fedora :: Sendmail - Setup To Send / Send Emails With It?
Aug 17, 2011I'm writing a script that will send an alert email given certain conditions. I have the impression that sendmail is what I need to do that. I just don't know how to use sendmail at all. I assume I have to set it up like a typical mail client so that it has a mail server to log into to send from.
I've looked through the man pages, but I can't find anything in plain English there on how to set it up, or how to use it once it is set up.
General :: Replace The Old One.o With The New One.o?
Feb 15, 2010I am having problem with the ar cmd. I had already created an archive archive.a with two .o files but I have modified one of them now. How do I replace the old one.o with the new one.o?
I used the ru cmd but it is not working. I don't think I am properly using it, this is how I have it so far:
ar ru archive.a one.o. But this is not working.
General :: Replace All The C's And C's In It With %1?
Nov 13, 2010I have a document. I want to replace all the c's and C's in it with %1 all the f's and F's in it with %2. i can get sed to do one of them but for some reason i can't get the script to do all the conversions at once.
View 4 Replies View RelatedGeneral :: Search And Replace /'s In VI
Feb 7, 2010I was wondering how I would search and replace all /'s with -'s in vi. %s///-/g doesn't work obviously.
View 2 Replies View RelatedGeneral :: Making RPM Replace Another One
Jul 12, 2011I want to make an rpm which when installed as an update causes another rpm to be removed. I'm fairly sure this is possible because I have seen LibreOffice rpms install as updates replacing OpenOffice rpms in the process without any interaction being required. However I'm unable to figure out how to do it, even after having looked at the spec file for such a LibreOffice rpm.
I have package gstreamer-0_10-ffmpeg installed. I have another package called multimedia installed. I've built a new version of multimedia which includes the gstreamer ffmpeg plugin so I don't need the gstreamer-0_10-ffmpeg package installed any more. I've tried using Provides and Obsolete in the spec file of the new multimedia package. E.g.
Code:
Provides: gstreamer-0_10-ffmpeg
Obsoletes: gstreamer-0_10-ffmpeg <= 0.10.10
(I've tried it with and without version numbers.) Whatever I put in the spec file, when I try and install the new multimedia package as an update zypper says
Code:
$ zypper up -y multimedia
Loading repository data...
Reading installed packages...
Resolving package dependencies...
Problem: multimedia-1.1-1.i586 obsoletes gstreamer-0_10-ffmpeg <= 0.10.10 provided by gstreamer-0_10-ffmpeg-0.10.10-0.i686
Solution 1: replacement of gstreamer-0_10-ffmpeg-0.10.10-0.i686 with multimedia-1.1-1.i586
Solution 2: do not ask to install a solvable providing multimedia > 1.0-2
Selecting an option manually is no good, I need the update to happen without user interaction.
General :: Find Or Replace Without Using Sed?
Dec 27, 2010I am working on writing a script for find and replace a string using sed.But know I want to write without using sed.
View 9 Replies View RelatedGeneral :: How To Replace The Path
Feb 16, 2010I added a path in my bash_profile so that I could use the executables in the directory (I thought). But it turned out some other directory has the same executables and the path had already been added by the previous user. Is there way to overwrite this path? I can't find where that old path was added.
View 10 Replies View RelatedGeneral :: Replace Everything Before @ Symbol?
Nov 13, 2009I have a list of email address's that I need to sift through to identify only the domain name.
xyz@yo.com
abs@yo.com
clahclah@test.com
I want to remove everything before the @ symbol and only print the domain name. Can anyone assist with this?
General :: Replace The () With Xxxx?
Dec 29, 2010I have a sed question
I got the following
(12121) and I want to replace the () with xxxx
so the output would be
xxxx12121
I am using the following but its not working
sed 's/(.*)/xxxxxx/g' TMP4 > TMP5