Parameters in sed command
 

I am using sed command like

sed 's/oldfile/newfile.v/' oldfile >newfile........(in my script)

I want to have change in version number of "newfile.v" whenever I
run the script having sed command...

In other words I want to replace "oldfile" with "newfile.1" then with
"newfile.2", "newfile.3".......so on each time I run my script...

I tired using $date to get latest version from systems but it didn't work?

How can I achieve that if at all........

Thanks

What about something like:
This will check for files called "file1", "file2", "file3" and so un until a file with that version doesn't exist - then you can just use $ver for the version number in your script.

_>>>>>>>>>>>>>>>>>>>
I am not sure if I got u correctly but I am trying to change newfile.v dynamically inside
the following statement

sed 's/oldfile/newfile.v/' oldfile >newfile

and it seems the $ver or $date doesn't work when used like

sed 's/oldfile/newfile.v$date/' oldfile >newfile........................

note the "$date" inside sed statement above

Re: Parameters in sed command
 

In your first post you said you were doing this within a script. Is this not the case?

Re: Re: Parameters in sed command
 

->>>>>>>>>>>>>>>>>
Yeah the......... sed 's/oldfile/newfile.v/' oldfile >newfile ....is a line in my script....

but when I tired using $date inside this statement just to pick latest system date
so that I can use it in my version reference...it didn't work

pls let me know if I am still not clear in any way...Thanks for your insight

To start with you wanted version numbers so that's what I suggested. If you want a date then try escaping the date command with whatever format you want - eg:
`date +%F_%T`

->>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
I tired using `date` inside sed command but its not working ....

sed 's/oldfile/newfile.v`date`/' oldfilename >newfilename

in the results I am getting expression: newfile.v`date`......rather
then newfile.v FEb 9............

probably I am using date in wrong way??????

Are you definately using backticks?

Try:

->>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
This option didn't work somehow

DATE=`date`

sed "s/oldfile/newfile.v${DATE}/" oldfilename >newfilename


?????????????

->>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Yeah I am using ` backticks ............
but it didn't work

?????????

Perhaps you could post the whole script so we can see what you are trying to do.

For what it's worth, the tool that I vastly prefer to use for most such things is awk, not sed.

Although sed is clearly a powerful piece of software, I find that it suffers greatly from chicken-scratch-itis which means that, even for my own code, I find myself staring at a line full of punctuation-marks ("chicken scratches") puzzling what they mean.

This example is for files with the .txt extension. You can change that to an extention of the type which you are using or even no extension....for i in *;

Run the command to see what the output looks like. If that is what you have in mind, remove the word echo from echo mv "$i" "file$r.ver${n}.txt"