Shell Programming and Scripting

Need to add the version date to the moved file if same file name in folder exists and limit the same files in the folder.

Ex: If moved or copy file abc.txt to folder XYZ then append the version date abc07112011.txt or abc07122011.txt in the folder.

\xyz
abc07132011.txt
abc07122011.txt
abc07112011.txt

And if the number of files is 10 i.e date more than 10 days then delete last file and add latest file

If a new file abc.txt is moved on 07182011 the new file need to be added with date abc07182011.txt and if more than 10 days old file exists then delete

To count the number of files in the current directory, you can use "ls" (<http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ls.html>) and "wc" (<http://pubs.opengroup.org/onlinepubs/9699919799/utilities/wc.html>) as follows:

Code:

ls -1 | wc -l

Then use "[" a.k.a. "test" (<http://pubs.opengroup.org/onlinepubs/9699919799/utilities/test.html>) to see if the result is greater than or equal to 10.

Code:

if [ "`ls -1 | wc -l`" -ge 10 ]; then
    # Do something.
fi

And you can get the name of the oldest file using "ls" and "tail" (<http://pubs.opengroup.org/onlinepubs/9699919799/utilities/tail.html>) as follows:

Code:

ls -t | tail -n 1

To get the date, use "date" (<http://pubs.opengroup.org/onlinepubs/9699919799/utilities/date.html>). Something like this should be what you want:

Code:

date '+%m%d%Y'

And you can add the date to a file whose name ends in ".txt" using "sed" (<http://pubs.opengroup.org/onlinepubs/9699919799/utilities/sed.html>). For example:

Code:

echo 'abc.txt' | sed "s/[.]txt\$/${the_date}.txt/"

I'm not sure exactly what you're trying to do, but hopefully this will help get you started.

Thanks . .. This will surely get me started. I am trying to take the backups for the past 10 days with the same file name and I need last ten days versions to be in the folder.