Visit Our UNIX and Linux User Community


editing files


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting editing files
# 1  
Old 07-21-2009
editing files

Is there any command which I can apply from the command line to find and replace a particular text say "00:00:00:00" with "00" from all the files( where ever this text exists) of the current directory?
# 2  
Old 07-21-2009
Yes, but be warned this does ALL files in a given directory.
It also does not change files in subdirectories.

Code:
cd /directory/I/want/to/change
ls -1 * |
while read fname
do
   sed 's/00:00:00:00/00/g'  "$fname" > tmp.tmp
   mv tmp.tmp "$fname"
done

# 3  
Old 07-21-2009
try this

# For multiple files
perl -pi -e 's/searchterm/replaceterm/' *.txt

#for single file
perl -pi -e 's/searchterm/replaceterm/' myfile.txt
# 4  
Old 07-21-2009
Or very similarly:

sed -i -e s/searchterm/replaceterm/g *.txt

You may need to quote the expression. You can also edit files in place with ed.
# 5  
Old 07-22-2009
Quote:
Originally Posted by peterro
Or very similarly:

sed -i -e s/searchterm/replaceterm/g *.txt

You may need to quote the expression. You can also edit files in place with ed.

Thanks for the reply. But this command will just display the term replaced by the new term, not that the changes actually takes place in the file. Even if we redirect the output to a different file this can be done only for one file at a time and also getting back to the original file name is at the cost of another command.

isn't there any way the changes can directly take place in those files?

Thanks in advance
# 6  
Old 07-22-2009
This is what the -i switch is for. From the sed man page:

Code:
 -i[SUFFIX], --in-place[=SUFFIX]

              edit files in place (makes backup if extension supplied)

# 7  
Old 07-22-2009
Quote:
Originally Posted by peterro
This is what the -i switch is for. From the sed man page:

Code:
 -i[SUFFIX], --in-place[=SUFFIX]

              edit files in place (makes backup if extension supplied)

This is GNU-ism - not all sed-s support that.

Previous Thread | Next Thread
Test Your Knowledge in Computers #190
Difficulty: Easy
In computer science, a data type is an attribute of data which informs the compiler or interpreter how the programmer intends to use the data.
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Editing files

This is a smallpart of my input file.I want to change the ID values of entries having CMW as an entry. Cont_1.266 . CMW 2958 3269 . - 0 PARENT=t:UM06506T0;ID=UM06506P0;rank=6 Cont_1.266 . CMW 3394 3505 . - 0 ... (3 Replies)
Discussion started by: sasdf
3 Replies

2. Shell Programming and Scripting

Bash script deleting my files, and editing files in subdirectories question

#!/bin/bash # name=$1 type=$2 number=1 for file in ./** do if then filenumber=00$number elif then filenumber=0$number fi tempname="$name""$filenumber"."$type" if (4 Replies)
Discussion started by: TheGreatGizmo
4 Replies

3. Shell Programming and Scripting

editing files.

hello, i have a problem. suppose file.txt i want to add lines over those lines in a file if it starts and ends with how and "?" respectively. i want output like output file.txt thanks (4 Replies)
Discussion started by: yashwantkumar
4 Replies

4. Programming

Editing binary files

I am working in C and need a solution for below problem: I have a binary file, which needs to be edited in such a way no data is loss. For example i have to insert 3 bytes of data at some position without changing the contents of the file. if file has data as:... (2 Replies)
Discussion started by: junaid.nehvi
2 Replies

5. Shell Programming and Scripting

Editing files to add some thing in all the files in a folder

Hi All, I have a folder that contains 100's of files and each file have a similar content like the following format: ((STBJa:200.0,((STBTz:200.0,(STSwe:200.0,(STDUw:200.0,(ST4Bu:200.0,STL2b:200.0):127.0):86.0):80.0):120.0, STAHr:200.0):134.0):200.0,STuNg:200.0);What I need is to do is add "#1"... (2 Replies)
Discussion started by: Lucky Ali
2 Replies

6. Solaris

editing files with script

hi guys, We have to implement new local (/etc/default/login) USER security policy on almost 50 stations. so editing /etc/default/login and /etc/default/passwd will be way too long work. Can we do the same using some script, I mean editing the above files and putting variables as RETRIES=3, ... (5 Replies)
Discussion started by: Asteroid
5 Replies

7. Solaris

changing IP thru editing files

I attempted to change the IP of my Solaris 9 box by changing these files: /etc/hosts /etc/hostname.dmfe0 And when I rebooted my system, the changes did not come up through the reboots. I have searched high and low and this is how you change the IP address permanently. Can anyone tell me what... (2 Replies)
Discussion started by: bluridge
2 Replies

8. OS X (Apple)

the best way of editing .plist files

:( what is the best way of editing the various .plist files without adding third party files? Or is the easiest way is to add third party applications, which ones? please kept in mind that i am not a programmer. mike (1 Reply)
Discussion started by: mehow
1 Replies

9. UNIX for Dummies Questions & Answers

Editing files

hi i would like to know whether i can delete a part of a file in C for eg. if my file contained 1234567890 and i want to delete 456 so that it becomes 1237890 is there a way i can do this. well, one way i can achieve this is by creating a new file, copy whatever i want, then... (2 Replies)
Discussion started by: sameersbn
2 Replies

10. UNIX for Dummies Questions & Answers

editing unix files on NT

i currently am using a unix server and NT pc. i have downloaded a ziped file that should explode into 3 seperate unix based files, however when i unzip it using Alading Expander it displays only 1. This exploded version contains all 3 files ( you can scroll down when viewing the file and see the... (1 Reply)
Discussion started by: pixelmonkey
1 Replies

Featured Tech Videos