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# 1  
Old 04-27-2006
Search and replace
I have a script which has several occurences of statement like
command: $UCMDPATH/xyz abc

I would like to replace the entire line starting from $UCMDPATH with the ls -ltr command
eg:
Prior to change::
command: $UCMDPATH/xyz abc

After change:
command: ls -ltr

Is there a way to do this using search and replace in vi...

Regds,
Jobby
# 2  
Old 04-27-2006
try this
You want to do it in vi - right?
FOr all lines, go to command mode;
:,$s/\(command:\)\(.*\)$/\1 ls -rlt/g

See if this works.
Ranjith
# 3  
Old 05-01-2006
MySQL
Ranjit,

Sorry for the delay in responding to ur update as I was out of town for a week. The solution prescribed by you works fine only change that I made to the same was

%s/\(command:\)\(.*\)$/command: ls -ltr/gc

I needed command: $UCMDPATH/abc xyz to be replaced by command: ls -ltr

Thanx a ton for the solution..

Regds,
Jobby
# 4  
Old 05-01-2006
re
Jobby,

Actually the '\1' replaces the first pattern we have matched using the parenthesis - \(command:\). I tried it in my vi and it worked right.
# 5  
Old 05-01-2006
Ranjit,

Could you just break down the entire command for me if it is not too troublesome for you...

:,$s/\(command:\)\(.*\)$/\1 ls -rlt/g

Regds,
Jobby
# 6  
Old 05-02-2006
here it is
':,$' means from the first line to the last line
You are trying to remember patterns when you use parenthesis. So,
s/\(command:\)\(.*\)$/ --> tells sed to remember 2 patterns; one is 'command:' and the other is rest of the line till the end of line. This can be referenced by \1 & \2.
Please read this link for more explanation.
Last edited by ranj@chn; 05-02-2006 at 02:57 AM.. Reason: typo error
# 7  
Old 05-02-2006
Computer
Thanx for the help provided mate. It sure cleared out my doubts w.r.t Search and replace of regular expressions.

Regds,
Jobby
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