General :: Isolate A Number From A Text File Using Sed?
Mar 27, 2010
I'm trying to isolate a number from a text file using sed. The text file looks like this:
-GARBAGE-GARBAGE-GARBAGE- Number of frames: 183933 frames Codec -GARBAGE-GARBAGE-GARBAGE-
I tried the following:
Code:
sed "s/^.*Number of frames: //g; s/ frames Codec.*$//g" "info.txt" > "frames.txt"
Strangely, it only seems to be stripping off the end, but not the beginning, like so:
-GARBAGE-GARBAGE-GARBAGE- Number of frames: 183933
I'm obviously not using the command correctly, so what am I doing wrong?
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Jun 21, 2010
on creating a new perl script which replace IP address from the text file. eg. If in a file, we found any word like 11.222.333.44 then it has to be replaced to XX.XXX.333.44
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Mar 20, 2011
I need to change all number 10 in a text file to word form, or in short from 10->ten. the thing is number 10 including in dates such as 10/22/1997 or 03-10-2011 should not be changed. im having some trouble because the file contains numbers like "price range from 10-50k".
this is just a sample.
name: john smith
birthday: 10-11-1995
date hired: 05/10/2010
expected salary: 10-50k
typing speed: 10 wpm
[Code].....
Using sed command is it possible to change like this..
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Sep 28, 2009
I have on my windows machine several hundred files that are a format of .nc .ncs for a CNC machine. I need to convert them to txt which is something as easy as opening in notepad and then saving as .txt but there are so many that this kind of action would take way too long.
The reason I am writing the linuxquestions is because I would feel more comfortable in loading a live CD and using some sort of terminal command to do this than I would to download one of the many "freeware" type programs I have found for windows (even more so since I have had a root kit before and had to start all the way over to get rid of it).
I need to know:
1. Is this possible to do with the terminal without super advanced knowledge.
2. Can one please point me in the right direction; something to read or an example
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May 3, 2010
a sed command to add a text before line number in text file? I have text file with 500 lines, and i want to add 3 more lines with text after line 300, OR before line 302, isn't no problem.
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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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Apr 9, 2011
How to get output of text file containing account number, debit amount, credit amount,date using shell script?
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Dec 17, 2010
I need to create a script to count the number of lines from a text file . The output must be put on another text file (no_lines.txt) and in this file i need to generate from the script this output :"File $FILE has $NO_LINES lines ".
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Mar 12, 2011
it is possible to change the root directory for a single, particular program. For example, I have an executable, 'miscreant.bin' that has all of it's required libraries in a directory named "libraries", in the same directory as the said executable. I can launch the program and make it use the libraries included with the executable rather than the system with:
Code:
/lib/ld-linux.so.2 --library-path ~/miscreant/libraries ~/miscreant/miscreant.bin
...or...
Code:
env LD_LIBRARY_PATH=~/miscreant/libraries ~/miscreant/miscreant.bin
With either, miscreant can be portable. But, I would also like to change the root directory (like chroot) of miscreant, so that the directory "~/miscreant/sandbox" becomes the root ("/"). So, if miscreant created a file named "/home/bryan/miscreant", it will be redirected to "~/miscreant/sandbox/home/bryan/miscreant". I am running Crunchbang 10 (Statler) on a 32-bit Atom netbook.
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Mar 16, 2011
is there command in linux which is able to convert binary (0101001010000100) to text like it means something
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Jan 22, 2010
I have 2 text files : file1.txt and file2.txt
cat file1.txt
15 this is a sentence containing various words and spaces
34 this is a another sentence containing various words and spaces
cat file2.txt
2 this is sentence1file2
6 this is sentence2file2
54 this is sentence3file2
I would like to join these 2 files. The result should look as follows :
cat joinedfile.txt
2 this is sentence1file2
6 this is sentence2file2
15 this is a sentence containing various words and spaces
34 this is a another sentence containing various words and spaces
54 this is sentence3file2
==> so the joined file must be sorted on the first number. Any ideas how this can be achieved ?
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Apr 28, 2010
How could I replace text in one file with text from another file using sed?
The text in each of the files would be surrounded by a starting and ending delimiter or a starting tag, say like /* */ so to easily find them.
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Sep 17, 2009
I'm looking for a way to insert the number of lines in a file to the start of the aformentioned file. This should be simple but as I am not used to scripts in Linux, I am finding it tough going. I can find the number of lines in a file easily enough via
filesize=$(awk 'END {print NR}' $1)
but as for inserting this into the first line, i'm failing to do so. I've tried some of the other approaches on these forums but none so far have been able to do so.
I've tried:
sed '1i$filesize' $1
but sed i requires a string, not a variable so no go I've also tried:
mv "$1" "${1}.bak" 2>/dev/null || touch "${1}.bak"
cat $filesize "${1}.bak" >"$1"
but again with no luck as cat seems to need an input stream Just to recap, i want to insert a line at the start of a given file that holds the number of lines the original file has.
ie the file:
a
b
c
d
e
should become:
5
a
b
c
[code].....
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Jul 15, 2011
I have used Awk in the past to isolate the file name from a given path..that is to say, I may have a list of files contained in list.txt.Can someone please post the Awk command that would do this? (I assume it will be very similar in form to the Awk command I showed above.)The point is, sometimes I may want to isolate the second directory, sometimes I may want to isolate the third directory or tenth or whatever - so I am hoping that if someone posts the Awk command to isolate the second level directory (to produce the output I showed in Fig.3) it should be fairly obvious by looking at the form of this command how to alter it and so isolate any other directory I want.
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Oct 24, 2010
How to isolate my home files from wine 'c' drive, i.e.,why does the 'up' gui connect the two?
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Feb 6, 2011
im trying to output a list of running processes via a shell script. At the moment i got this which outputs the processes to a text file called out.
echo $(ps aux) >>out
The problem is though, the processes are all just one big block of text which makes it hard to read. Does anyone know how to sort the output to a text file so that it prints to the text file at 1 process per line? I know its probably simple but im very new to linux.
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Mar 24, 2010
I need to get the max number from the name of a file
Formant of the file name:
[a-zA-Z]*_[0-9][0-9]_[A-Z][A-Z].log
Delimiter as underscore '_'
[code]....
known part in the above file name will be GA.log A give directory may or may not contain files in the above format or may contain file other then the above format if so then ignore it.
Eg:-
1) Directory=/tmp/log having below listed files
ant_01_EG.log ant_02_GA.log ant_04_EG.log cvs_01_EG.log cvs_02_GA.log cvs_04_EG.log master_01_GA.log master_03_EG.log master_04_GA.log
[code]....
output=> 06
2) Directory=/tmp/log no files
cmd=> ls *[0-9][0-9]_GA.log 2> /dev/null | awk -F_ '{ print $2}' | sort -nr | head -n1 | awk 'BEGIN { if ($1 >0 ) x=0; else x=1 } END {printf "%02.0f
", $1+1}'
output=> 01
if there are no files the output should be 01 and if file(s) found the output should be next highest number+1, In the above example it is 06 My cmd is bit lenghty. reduce my cmd and it should be in one line.
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Apr 23, 2009
I have a text file that contains the following string of numbers and letters:
Code:
Mean track length: 3.45 +/- 1.23 mm
or
Code:
Mean track length: 22.45 +/- 12.23 mm
In the first example, I would like to grab only 3.45 and write it into a new file. Then I would like to grab only 1.23 and write it into another file.
I have 80,000 files to do and those numbers can be different every time.
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Nov 9, 2010
I'm currently trying to design a small, simple enough shell program for area codes. I have a list of area codes in a database, and I am trying to write a program that will have a user input an area code, and then have the program print out information that immediately follows that area code in my database. I assume I need to use a find or locate command, but I'm not sure if I should be searching for a string or the number itself. The number could possibly occur at some other point in the file, though the way I have the file set up it only occurs once at the newline.
what function I should use and how I should go about it? As is I only have the absolute bare-bones beginning of having an echo for the prompt to input an area-code, and the read once it's input. Without the find I'm not sure how much farther I can get. Also, would it make it easier if I added some character such as a ! to the end of the number at the newline to make it easier to search for? With a macro that would be easy enough to do.
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Jan 28, 2009
I have a text file called file1.txt containing many lines eg.
line1
line2
line3
line4
line5
line6
Then i have another text file called file2.txt contains
3
5
6
Is there a command to remove the lines in file1.txt based on the keywords in file2.txt? note: It should remove line3,line5,line6 based on 3,5,6
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Nov 16, 2010
Can we find the inode of a particular file using its inode number?
The reason is i want to know how many blocks are occupied by specific file.
if we consider block size of 1K.
if the file size is of 100 bytes. In such a case, when the file is
stored on disk, the file will occupy 100 bytes or 1K (since we have
choosen block size to be 1K) ?
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Jul 26, 2011
I'm trying to write a script that takes two arguments, the first argument is a number, and the second argument is a filename. The shell script should indicate if the file's size is BIGGER or SMALLER the number provided. this is what i have sofar, am i on the write track, i'm hoping its just a problem with my if command
if [ $1 -h $2 ]
then
echo "$1 is bigger than $2"
else
[code]....
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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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Oct 21, 2010
My folder have some files and I want to show the number of files on folder at "Total file on folder: " Ex: Monday folder have six files and it will show "Total file on folder : 6" when I run a script. This is my code :
#!/bin/sh
if [ -d /home/kenzo/Monday/ ] && {
echo "Monday"
ls -l /home/kenzo/Monday/
[code].....
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Apr 6, 2010
# echo "foobar" > /tmp/word
# cat /tmp/word | wc -m
7
I want to print the number of characters in the file. Why does it output 7? Am I missing something obvious?
manpage:
-m, --chars
print the character counts
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May 19, 2010
I need to know the version number of tar used to create a specific tar file. How can I do that?
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May 19, 2010
If you create a file on UNIX/linux with special chars, like touch "la*, you can't remove it with rm "la*. You have to use the inode number(you can if you add the before the name, I know, but you'd have to guess as a user that it was used in the file creation).
I checked the manpage for rm, but there's no metion of the inode number. Doing rm inodenumber doesn't work either.
What is the command for this?
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Jul 28, 2011
I have a large number of log files, on a linux box, I need to cleanse sensitive data from before sending to a third party. I have used the below script on previous occasions to perform this task, and it has worked brilliantly (script was built with some help from here :-)
#!/bin/bash
help_text () {
cat <<EOF
Usage: $0 [log_directory] [client_name(s)]
EOF
[Code]...
However, now one of our departments has sent me a CLIENT_FILE.txt with 425000+ variables! I think I may have hit some internal limit. I have tried splitting the client file into 4 with around 100000 variables in each, this still doesn't work. I'm loathe to keep splitting though as I have 20 directories with up to 190 files in each directory to run through. The more client files I make, the more passes I have to do.
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Aug 23, 2011
I need to be able to convert HTML email messages saved as text files (.eml or .msg) to PDF documents, one PDF per email, retaining formatting and images.
Are there any Linux tools that will allow me to do this from the command line (so it can be scripted)?
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Sep 7, 2010
how to verify if the file is binary or text without to open the file
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