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Shell Programming and Scripting

remove a line in files

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# 1  
Old 07-14-2009
remove a line in files
Hi

I have 3 files and I want to remove 1 line in each file. This line correposnds to the occurrence of a specific pattern

any idea how to do this in shell?

thx
# 2  
Old 07-14-2009
sounds like 'sed' would be a good starting point.
what have you tried so far?
# 3  
Old 07-14-2009
Use search, this solutions has told so many times using grep, sed, awk, perl, shell ex. case, ...
No need to use shell, simple commandline using cmd grep is enough:
ex.
grep -v "removedatapattern" infile > resultfile
# 4  
Old 07-14-2009
First make backups of your files.

Does each file have the same pattern? If so,
Code:
sed -i '/PATTERN/d' file1 file2 file3

Now this might remove MULTIPLE lines in each file matching the pattern. If that's unacceptable, you can use awk this way:
Code:
for m in file1 file2 file3; do
   awk 'fixed && /PATTERN/ { fixed=1; next; } { print }' $m .~$m.$$
   mv .~$m.$$ $m
done

There might be a way to do this in sed too.
# 5  
Old 07-14-2009
try:

Code:
perl -i -e ' while(<>) { unless (/pattern/) {print; }} ' file1 file2 ...

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