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Top Forums Shell Programming and Scripting awk find and delete line from list Post 303007798 by Don Cragun on Tuesday 21st of November 2017 09:10:19 PM
Old 11-21-2017
Quote:
Originally Posted by klein
thanks Don Cragun;
i was just coming back to fix that


---------- Post updated at 08:56 PM ---------- Previous update was at 08:44 PM ----------

sorry Don Cragun
that did not work , it ran in bash with out any errors but did not change
file.txt
I was just talking about the awk part. You still have to capture the output produced and copy it back to the target file. I just didn't understand why part of your code was using file and part of it was using file.txt.

You could either use:
Code:
grep -f input.txt -v file.txt > file

if you want what your script was doing, or you could use:
Code:
grep -f input.txt -v file.txt > file && mv file file.txt

if you wanted to replace file.txt with its original contents minus the deleted lines.

Of course, having an example where all of your input is removed by the operation means that you could get the same results just using the command:
Code:
> file.txt

This User Gave Thanks to Don Cragun For This Post:
 

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bntext(5)							File Formats Manual							 bntext(5)

NAME
bnmotd.txt, bnnews.txt bnissue.txt - messages for the Unix Battle.net daemon DESCRIPTION
The file bnmotd.txt contains text displayed by bnetd(1), when users first log into the server. The file bnnews.txt contains text displayed when the user uses the /news chat command. The files consist of raw text with printf-style formatting escapes. Each line of a file can contain a type formatter from the following list: %B Use the broadcast attribute (???). %C Execute the line as if the user entered it as a command. %E Use the error attribute (red). %I Use the info attribute (yellow). This is the same was %W. %M Normal chat message (white). This will appear as if the user said it. %T Emote chat message (???). This will appear as if the user said it. %W Use the warning attribute (yellow). This is the same was %I. Within a line, any of the following format formatters may be used: %% Expand to a literal percent sign (%). %a Expand to the number of accounts on the server. %c Expand to the number of channels on the server. This includes all permanent and current temporary channels. %g Expand to the number of games on the server. This includes both public and private (passworded) games. %h Expand to the hostname of the server (as returned by gethostname(2)). %i Expand to this user's account ID number, formatted with a leading pound (#) sign and leading zeros. %l Expand to this user's current chat name which is usually the same %r Expand to the IP of the remote machine (the client). %t Expand to four character client tag. %u Expand to the number of users logged into the server. %v Expand to the version number of the server. SEE ALSO
bnetd(1) AUTHOR
Ross Combs (ross@bnetd.org) 2 August, 2001 bntext(5)
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