Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

sed and changing the file itself

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting sed and changing the file itself
# 1  
Old 01-22-2008
sed and changing the file itself
hello

I have this:
sed -e "s/install_location=....../g" -e "s/hostname=....../g" -e "s/server_name=....../y" input.txt

it will display on the screen what have changed. however I want to change file input.txt. Any idea other than doing redirection (>)

thx
# 2  
Old 01-22-2008
before i use sed to edit a file, first i backup the file, then i sed it with the backup into the orig file.
Code:
cp input.txt input.txt.bak
sed -e "s/install_location=....../g" -e "s/hostname=....../g" -e "s/server_name=....../y" input.txt.bak>input.txt

Sorry, I do not know of a way without redirection
# 3  
Old 01-22-2008
Quote:
Originally Posted by melanie_pfefer
hello

I have this:
sed -e "s/install_location=....../g" -e "s/hostname=....../g" -e "s/server_name=....../y" input.txt

it will display on the screen what have changed. however I want to change file input.txt. Any idea other than doing redirection (>)

thx
If your sed support -i switch(backup file).
Code:
 
sed -i .bak -e "s/install_location=....../g" -e "s/hostname=....../g" -e "s/server_name=....../y" input.txt && rm input.txt.bak || mv -f input.txt.bak input.txt

If sed fail, restore the file from backup, if not remove the backup file.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Changing time-stamp with sed

Hi ! I try to change a time-stamp hh:mm:ss allways to full ten-minutes. example: 12:51:03 to 12:50:03 sed 's/::/:{0-5}0:/g' file.txt but it will not work propperly, because the minute-decade will be replaced with the bracket-term {0-5}. Can someone please give me a hint? Thanks in... (6 Replies)
Discussion started by: IMPe
6 Replies

2. Shell Programming and Scripting

sed/awk changing values

Can somebody help me out and provide me with a SED or AWK solution that converts TO_DATE CLAUSE -> TIMESTAMP I need to keep the PARTION value (HISTORY_20110417) and DATE/TIME value (2011-04-18 00:00:00) the same for every line PARTITION HISTORY_20110417 VALUES LESS THAN (TO_DATE('... (3 Replies)
Discussion started by: BeefStu
3 Replies

3. Shell Programming and Scripting

changing files content with sed or awk

Hi, Example File: (jumped, bumped, ) how to jumped, FROM tree; EXIT I have some hundreads of files like this with the different words and I want to remove the comma before the bracket and also I have to remove the comma before FROM word. I am trying to use this command : awk '... (5 Replies)
Discussion started by: rajshashi
5 Replies

4. UNIX for Dummies Questions & Answers

Changing Text with sed or awk

I'm changing some html code on multiple web pages and I need to match particular phrases but keep some text within each phrase. E.G. I need to change this line: <DIV id="heading">Description:</DIV> into <span class="hlred">Description:</span><br /> The text "Description:" may... (2 Replies)
Discussion started by: hal8000
2 Replies

5. Shell Programming and Scripting

changing c comments to c++ style with sed

Hi everyone, I've got a problem with converting C comments ( /* */ ) into C++ style ( // ) in some source file with sed. So far I've dealt with comments on one line, but I don't know how to convert when it is over multiple lines ... So I already have something like this: comments.sed ... (8 Replies)
Discussion started by: kolage
8 Replies

6. Shell Programming and Scripting

"Sed" while changing a key in a file

Hi, I am new to shell scripting. I use Solaris10 machine.I have to write a simple shell script which replaces a part of string a file. my file name is properties.ini, which has the following values #application properties location.mysql = /opt/bin # ( here location.mysql is... (3 Replies)
Discussion started by: raghu.amilineni
3 Replies

7. UNIX for Dummies Questions & Answers

Changing the order using sed

I have a text "abc def ghi" and I want to get it as "def abc ghi" I am using this echo "abc def ghi" | sed 's/\(*\)\(*\)/\2\1/' But I am not able to get the output, could anyone help me. Thanks (9 Replies)
Discussion started by: venu_nbk
9 Replies

8. Shell Programming and Scripting

need help on sed (replace string without changing filename)

I have awhole bunch of files and I want to edit stringA with stringB without changing the filename. I have tried the following sed commands: sed "s/stringA/stringB/g" * This will print the correct results but does not actually save it with the new content of the file. when I do a cat on... (5 Replies)
Discussion started by: jjoves
5 Replies

9. Shell Programming and Scripting

Changing Special Characters Using Sed

Hi. Does anyone know how to use the sed command to change the special border characters on this .per file. I have to edit about 80 .per files. I need a sed script to change the below 3 and A characters. ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³ Test Islands, Office of Public Health -- WIC... (4 Replies)
Discussion started by: cstovall
4 Replies

10. UNIX for Dummies Questions & Answers

Changing text with sed?

Hi everyone, Having trouble with sed. I searched the board and found some stuff, but still unclear. I have a file named "userfile" which stores the users info in this form: email:username:password: I want the user to be able to change their password. i tried with sed s/oldpass/newpass/g... (2 Replies)
Discussion started by: primal
2 Replies
Login or Register to Ask a Question