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Old 02-16-2008, 06:27 AM   #1
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how to delete last number/word of a file and incude file count at the end of the

hi friends,

i have a file that includes file count appended at the end of the file, now am deleting few of the lines in the file but the file count remains the same as the older one.

So i need to append the modified file count in to the file.

Example of my file:

1|sdfsfsdf|somestuffs|4->file count

After deleting one row :


i need to change the file count to 3 instead of 4 using sheel script. Can someone please help me on this.
Old 02-16-2008, 06:44 AM   #2
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I'm not sure if deleting one or more lines should also be done from this script.

The following will count the amount of lines in a file and adjust the number to that amount:

linesInFile="`awk 'END{ print NR}' infile`"

sed -i '$s/[0-9][0-9]*$/'${linesInFile}'/' infile
Example run:
$ cat infile

$ ./testscript

$ cat infile
The linesInFile part fills a variable with the actual amount of lines present in a file.
The sed part replaces the number present with the actual amount.

Hope this helps.
Old 02-18-2008, 10:08 PM   #3
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Hi druuna,

This worked for me thanks a lot for your help.....

At first i got a error saying

illegal option -- i

Then instead of "-i" i used "-e" and saved in a new file, here is my command :

sed -e '$s/[0-9][0-9]*$/'${linesInFile}'/' infile > newfile

Last edited by chennaiguy; 02-18-2008 at 10:15 PM.


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