topic how to replace strings in multiple files thru script or command line in Operating System - HP-UX

how to replace strings in multiple files thru script or command line

Sachin_29 — Tue, 27 Jul 2004 13:56:11 GMT

Hi:
I have "n" files in a directory and I want to search for A/B/C/D and replace it with E/F/G/H/I in all the files thru a script or on a command line. I have to do this on 6 servers so ..

any suggestions

Re: how to replace strings in multiple files thru script or command line

Sundar_7 — Tue, 27 Jul 2004 14:00:46 GMT

# cd /dir
# for FILE in *
do
mv $FILE $FILE.tmp
sed 's|A/B/C/D|E/F/G/H/I|' $FILE.tmp > $FILE
[ $? -eq 0 ] && rm $FILE.tmp
done

Re: how to replace strings in multiple files thru script or command line

A. Clay Stephenson — Tue, 27 Jul 2004 14:20:13 GMT

I think I would leverage sed to do this although Perl would also be a good choice.

1) Create a file, /var/tmp/x.sed, and insert your replacement instructions.

I'll use '+' as the delimiter because that will make your "/" replacements easier.

s+A/B/C/D+E/F/G/H/I+g

You can put as many sed commands in this file as your like; they will be processed sequentially on each file.

2) Create a script to find the text files in the current directory and sed them.

#!/usr/bin/sh

TDIR=${TMPDIR:-/var/tmp}
TFILE=${TDIR}/X${$}_1.txt
SEDFILE=/var/tmp/x.sed

STAT=0
ls | while read X
do
file "${X}" | grep -q -i "text"
STAT=${?}
if [[ ${STAT} -eq 0 ]]
then
sed -f ${SEDFILE} "${X}" > ${TFILE}
STAT=${?}
if [[ ${STAT} -eq 0 ]]
then
mv ${TFILE} "${X}"
fi
fi
done
exit ${STAT}

Re: how to replace strings in multiple files thru script or command line

Rodney Hills — Tue, 27 Jul 2004 15:38:37 GMT

A one line perl command would be:

perl -p -i -e 's{A/B/C/D}{E/F/G/H/I}g' *

If you have openssh installed, you could run it on each of the servers by:

for x in server1 server2 server3 ; do
ssh $x "cd /mydir ; perl -p -i -e 's{A/B/C/D}{E/F/G/H/I}g' *"
done

HTH

-- Rod Hills

Re: how to replace strings in multiple files thru script or command line

Petr Simik_1 — Fri, 30 Jul 2004 01:03:52 GMT

This is simple change of string on specific file on multiple servers.

for i in `cat serverlist`
do
remsh $i "sed 's/stringA/stringB/g' /dir/fileX"
done

Re: how to replace strings in multiple files thru script or command line

Muthukumar_5 — Fri, 30 Jul 2004 02:01:08 GMT

IF you want to change the pattern with in one directory then grep and sed will do that, if you want to do it multiple directories we have to use find,grep and sed commands

Limitation: If we use grep to grep a pattern on a object file ,it will make a lot of error and unreadable symbols.

In a single directory:
find . -name "*" -exec grep -q 'A/B/C/D' {} \; -print | awk '{ print "echo \"`sed -e 's%A/B/C/D%E/F/G/H%' "$1"`\"> "$1 }' | sh

Multiple directory:

Change find . to your testing directory. It will do this in their subdirectories too.

Use -type f instead of -name "*" also