help with sed


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting help with sed
# 1  
Old 03-25-2010
help with sed

Guys,

Need your help. I am not very experienced Unix programmer.

I need to write a script which would edit a file on multiple servers by remote execution. I am using rexec command for that. The file which i want to edit has multiple lines. I need to edit one particular line which is like HST|ABC|FF|XX|||(where XX value may be different on servers and this is the value which i want to change to the value i would supply to script). anyone has a idea?

Please remember i need to execute this on a remote sever:

rexec gagft01 -l nkl -n '

sed command to edit file

'

(remote environment is HP-UX)

---------- Post updated at 06:30 PM ---------- Previous update was at 05:30 PM ----------

Anyone with a solution?

Last edited by NK4U; 03-25-2010 at 06:38 PM..
# 2  
Old 03-25-2010
The script below should do what I think you are asking. You will need to update the variables for:
servers = a space-delimited list of the server names with login IDs
fileName = the full name with path of the file to be edited (assumes the same file on each server
newvalue = the new number to be inserted (assumes the same value for each server)

After executing this script, you will find a new file in each location with the same file name with a suffix of the current date (i.e. _20100325).

Code:
#!/bin/bash

#Variables - Update these as necessary
servers=( user1@server1 user2@server2 user3@server3 )
fileName=/path/to/file/file1
newValue=23
today=$(date +%Y%m%d)

#sed Command
sedCommand="sed s/HST|ABC|FF|[0-9][0-9]|||/HST|ABC|FF|${newValue}|||/"

for s in ${servers[@]}; do
    ssh ${s} mv ${fileName} ${fileName}_${today}; ${sedCommand} < ${fileName}_${today} > ${fileName};
done

If you need different values for each server, then this will need some tweaking.
# 3  
Old 03-25-2010
Quote:
Originally Posted by dunkar70
The script below should do what I think you are asking. You will need to update the variables for:
servers = a space-delimited list of the server names with login IDs
fileName = the full name with path of the file to be edited (assumes the same file on each server
newvalue = the new number to be inserted (assumes the same value for each server)

After executing this script, you will find a new file in each location with the same file name with a suffix of the current date (i.e. _20100325).

Code:
#!/bin/bash
 
#Variables - Update these as necessary
servers=( user1@server1 user2@server2 user3@server3 )
fileName=/path/to/file/file1
newValue=23
today=$(date +%Y%m%d)
 
#sed Command
sedCommand="sed s/HST|ABC|FF|[0-9][0-9]|||/HST|ABC|FF|${newValue}|||/"
 
for s in ${servers[@]}; do
    ssh ${s} mv ${fileName} ${fileName}_${today}; ${sedCommand} < ${fileName}_${today} > ${fileName};
done

If you need different values for each server, then this will need some tweaking.
Thanks Dunkar, i will try this
# 4  
Old 03-25-2010
clarification...

you're welcome... I should clarify... the new file with the date suffix is a backup of the file before the change. The new values are available in the file with the original file name.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

I am learning regular expression in sed,Please help me understand the use curly bracket in sed,

I am learning SED and just following the shell scripting book, i have trouble understanding the grep and sed statement, Question : 1 __________ /opt/oracle/work/antony>cat teledir.txt jai sharma 25853670 chanchal singhvi 9831545629 anil aggarwal 9830263298 shyam saksena 23217847 lalit... (7 Replies)
Discussion started by: Antony Ankrose
7 Replies

2. Shell Programming and Scripting

sed and awk giving error ./sample.sh: line 13: sed: command not found

Hi, I am running a script sample.sh in bash environment .In the script i am using sed and awk commands which when executed individually from terminal they are getting executed normally but when i give these sed and awk commands in the script it is giving the below errors :- ./sample.sh: line... (12 Replies)
Discussion started by: satishmallidi
12 Replies

3. Shell Programming and Scripting

sed inside sed for replacing string

My need is : Want to change docBase="/something/something/something" to docBase="/only/this/path/for/all/files" I have some (about 250 files)xml files. In FileOne it contains <Context path="/PPP" displayName="PPP" docBase="/home/me/documents" reloadable="true" crossContext="true">... (1 Reply)
Discussion started by: linuxadmin
1 Replies

4. Shell Programming and Scripting

How to use sed to replace the a string in the same file using sed?

How do i replace a string using sed into the same file without creating a intermediate file? (7 Replies)
Discussion started by: gomes1333
7 Replies

5. UNIX for Dummies Questions & Answers

SED: Can't Repeat Search Character in SED Output

I'm not sure if the problem I'm seeing is an artifact of sed or simply a beginner's mistake. Here's the problem: I want to add a zero-width space following each underscore between XML tags. For example, if I had the following xml: <MY_BIG_TAG>This_is_a_test</MY_BIG_TAG> It should look like... (8 Replies)
Discussion started by: rhetoric101
8 Replies

6. Shell Programming and Scripting

deleting text records with sed (sed paragraphs)

Hi all, First off, Thank you all for the knowledge I have gleaned from this site! Deleting Records from a text file... sed paragraphs The following code works nearly perfect, however each time it is run on the log file it adds a newline at the head of the file, run it 5 times, it'll have 5... (1 Reply)
Discussion started by: Festus Hagen
1 Replies

7. Shell Programming and Scripting

sed has zeored my files. Help me with sed please

i made a script to update a lot of xml files. to save me some time. Ran it and it replaced all the the files with a 0kb file. The problem i was having is that I am using sed to change xml node <doc_root>. The problem with this is it has a / in the closing xml tag and the stuff inside will also have... (4 Replies)
Discussion started by: timgolding
4 Replies

8. Shell Programming and Scripting

sed over writes my original file (using sed to remove leading spaces)

Hello and thx for reading this I'm using sed to remove only the leading spaces in a file bash-280R# cat foofile some text some text some text some text some text bash-280R# bash-280R# sed 's/^ *//' foofile > foofile.use bash-280R# cat foofile.use some text some text some text... (6 Replies)
Discussion started by: laser
6 Replies

9. Shell Programming and Scripting

Issue with a sed one liner variant - sed 's/ ; /|/g' $TMP1 > $TMP

Execution of the following segment is giving the error - Script extract:- OUT=$DATADIR/sol_rsult_orphn.bcp TMP1=${OUT}_tmp1 TMP=${OUT}_tmp ( isql -w 400 $dbConnect_OPR <<EOF select convert(char(10), s.lead_id) +'|' + s.pho_loc_type, ";", s.sol_rsult_cmnt, ";", +'|'+ s.del_ind... (3 Replies)
Discussion started by: kzmatam
3 Replies

10. Shell Programming and Scripting

Sed Question 1. (Don't quite know how to use sed! Thanks)

Write a sed script to extract the year, rank, and stock for the most recent 10 years available in the file top10_mktval.csv, and output in the following format: ------------------------------ YEAR |RANK| STOCK ------------------------------ 2007 | 1 | Exxon... (1 Reply)
Discussion started by: beibeiatNY
1 Replies
Login or Register to Ask a Question