Linked Questions

303
votes
2answers
1.6m views

Using 'sed' to find and replace [duplicate]

I know this question has probably been answered before. I have seen many threads about this in various places, but the answers are usually hard to extract for me. I am looking for help with an ...
3
votes
2answers
365 views

How do I delete a line only if it is at the specified line number and it matches the pattern? [duplicate]

How do I delete a line only if it is at a specified line number and it matches the pattern? For example: I want to delete (d); the third line (3); if it's blank (^$); The following syntax: cat ...
-1
votes
1answer
5k views

how to replace a specific pattern from all files [duplicate]

suppose I want to replace abc with xyz in all files in a directory. How do I write a script for this ?
-3
votes
1answer
3k views

How can i replace a specific string within a line inside a text file [duplicate]

$ cat text.txt my name is Steven my age is 10 i like dogs What command will be fitting so that echo "Kate" will replace Steven on text.txt?
0
votes
1answer
3k views

How to replace the last octet of a valid network address with the number 2 [duplicate]

Lets say I have a string that can be any possible/valid network address like so: STR="192.168.1.0/24" What I want to do is replace the last octet (in this case it's 0/24, however it can be anyting) ...
-1
votes
1answer
1k views

How to edit a file from a script using a loop instead of find and replace with sed? [duplicate]

Here is an example of what I am trying to do: #!/bin/bash Update=$1 if [$Update == Value] then NewValue= $Update vi %s/Value/$NewValue/g > Updatedfile fi exit 0 Is there a way to ...
-4
votes
1answer
2k views

How to change certain word in certain line in a file [duplicate]

i have a file in which i have to change a word and then save it by same name. for ex- for file "name"- my name is joe (original data) my name is roy (changed data) how to do it in best possible ...
0
votes
1answer
2k views

How to change a single line in multiple files [duplicate]

I have ~750 .php files in the same directory that contain the line include("path/to/file.php"); I would like to change this line in every file to require_once("path/to/file.php"); What would be an ...
1
vote
1answer
783 views

Grep global find replace [duplicate]

Is there a way to grep for a regular expression on an Ubuntu server and then find and replace it with another string? I am using the following command right now, but it doesn't account for actually ...
0
votes
1answer
613 views

Why won't my change to the sshd_config file persist? [duplicate]

I am writing a script to modify settings on my Ubuntu server. I have the following line in it: sudo sed 's/PasswordAuthentication yes/PasswordAuthentication no/' /etc/ssh/sshd_config The problem is ...
0
votes
1answer
780 views

Modify part of line if keyword is found using sed? [duplicate]

I want to modify a line if a specific keyword is found in a line. CS_CODE, SM_NUM, PORT_NUM, DEV_PORT_NUM, DIRNUM, MAIN_DIRNUM, BILL_NO, ADR_NAME In above line, if 'PORT_NUM' is present then '...
-1
votes
1answer
703 views

How do i create a sed script to prompt the user to replace a number in a file? [duplicate]

I'm new in Unix, and I'm learning about sed command. I need to write a very small script for searching a number in a file and replacing it. I tried doing grep, and than deleting the specific phone ...
0
votes
3answers
101 views

How to modify file content? [duplicate]

Ubuntu 16.04 I have some pretty large file so modifying it by hand is not possible. I'd like to change all occurences of <tag1>true</tag1> to <tag1>false</tag1>
2
votes
1answer
176 views

Changing text in text file [duplicate]

Is there a command line way to change text in the file? Like say I would like to change all strings "lukuunottamatta" to the form "lukuun ottamatta" and "Lukuunottamatta" to the form "Lukuun ottamatta"...
0
votes
2answers
148 views

Insert character at the beginning of specific lines [duplicate]

Let's say I have file: % This is first line % This is second line This is content % This is the end How can I insert a % character at the beginning of every line which already starts with %? ...
-1
votes
1answer
207 views

Replace mutiple strings with different values in a file using unix [duplicate]

I have a file in which the data is like below, 01,0000000,xxxxxxx/ 02,xxxxxxxx,yyyyyy/ 03,test1,41203016,,/ 01,0000000,xxxxxxx/ ...
1
vote
0answers
174 views

Search For a Word and Replace It In Entire File Using Egrep [duplicate]

How do I search an entire file for a word and replace it with another word using egrep?
0
votes
1answer
101 views

Replace copyrights recursively [duplicate]

I have many files under the current directory. Each file contains copyrights headers like, # # Copyright 2013 Company, Inc. All rights reserved. This software # is property of Company, ...
0
votes
1answer
130 views

Substituting words in parenthesis using sed [duplicate]

I have a basic python script that looks like this: my_name = 'Zed' my_age = 35 my_height = 74 my_weight = 180 my_eyes = 'Blue' my_teeth = 'White' my_hair = 'Brown' print "let's talk about %s" % ...
1
vote
2answers
88 views

SED Search and Replace on Linux [duplicate]

I want to change the value from 1521 to 1525 in FROM_HOST only in file gexhosts.cat: FROM_HOST db201521 TO_HOST db201521 Is there a way to do that or some work around? I would really prefer ...
0
votes
2answers
52 views

Remove occurrence of a pattern from string everywhere [duplicate]

I want to remove occurrence of a string from a given string. Like /hello: from a string like /yo:/sup:/hello:/yo:/hello:/yup. And one thing for sure if string contains a colon in end then it must be ...
-2
votes
1answer
40 views

How do I convert all occurrences of the word “OLD” in some file with the word “NEW” in Linux [duplicate]

Can someone give me a command that convert all occurrences of the word “OLD” in some file with the word “NEW” in Linux? Thanks in advance
26
votes
2answers
2k views

Security implications of running perl -ne '…' *

Apparently, running: perl -n -e 'some perl code' * Or find . ... -exec perl -n -e '...' {} + (same with -p instead of -n) Or perl -e 'some code using <>' * often found in one-liners ...
6
votes
3answers
11k views

How to delete all occurrences of a list of words from a text file?

I have a file containing a list of words. I want to remove all occurrences of all the words in this file from a big text file. Example: File 1 queen king Text file sample Both the king and queen ...
4
votes
4answers
203 views

Double quote value assignments stored in a CSV?

I have a file that contains text as follows: dt=2016-06-30,path=path1,site=US,mobile=1 dt=2016-06-21,path=path2,site=UK,mobile=0 I want to convert it to text with double-quoted values in the key-...
2
votes
2answers
3k views

Using regular experision in “rpl” command

I need to replace text in lots of files. I'm using rpl for this purpose, but I can't find any way to make it use regular expressions. Can rpl use "regex"? how? Edit: I'm using rpl 1.5.2 from Ubuntu ...
3
votes
2answers
609 views

Replace only in particular range string

In the canonical How can I replace a string in a file(s)? in 3. Replace only if the string is found in a certain context, I'm trying to implement the replace of a pipe with white spaces in file with ...
0
votes
1answer
194 views

Running several sed commands on same files simultaneously

To change all occurences of the string foo to bar in all files in a directory I use sed -i -- 's/foo/bar/g' * Found that here But I also want to change NAME to name etc. I tried, sed -i -- 's/foo/...
1
vote
1answer
299 views

Inserting delimiter into file

I have a file with a similar format to the following: 1.1.1.5 Ensure mounting of hfsplus filesystems is disabled 1.1.1.6 Ensure mounting of squashfs filesystems is disabled 1.1.15 Ensure nodev option ...
-4
votes
3answers
1k views

find and replace strings with another string command line

I have a Ad-blocking hosts file with 0.0.0.0 IPs pointing to URLs. How to replace 0.0.0.0 with 127.0.0.1 command line without any visual text editor ? Manually doing this with nano , vi etc. is ...
-1
votes
2answers
804 views

How to use sed on all matching files?

I am trying to run sed on the output from find | grep \.ext$ However, sed requires input file and output file. How can I save the output line to a variable, or pass it to sed?
1
vote
1answer
638 views

How to search-replace-backup files recursively in linux?

I'd like to recursively search for a string within all files in a folder. If the string was found, backup the file to the same location (copy to <filename>-orig) and replace the found string ...
1
vote
1answer
358 views

Escape >');} < / in sed

In 30 files in 30 directories, I want to find: script>');} < /script> and replace it with: script>');} < /script--> What special characters do I need to escape in the find field? ...
0
votes
1answer
214 views

Search and replace something contained in ' (single quotes)

In various files in lots of sub folders I have the following text in large text files, each unique Linux.Secret = 'XYZZYXZYXZYXZYXZYXZ' I would like to make it so all the Linux.Secret = '' are the ...
2
votes
1answer
161 views

What does **/*(D.) mean in (zsh) sed arguments?

I see this command being given as how to search and replace strings in files in this answer: sed -i -- 's/foo/bar/g' **/*(D.) What does the pattern */*(D) mean? I am not sure what they are called, ...
-1
votes
1answer
120 views

Replace a value in a file, in a certain context, with an operation result

I have an array of JSON object with inside local urls and speed parameters like [{server:"192.168.0.100", speed:34}, {server:"192.168.0.130", speed:52},...] I need to update the speed value for each ...