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insert period at the end of each line

 
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# 1  
Old 11-18-2008
insert period at the end of each line
file1 contains:

this is a test
this is a test and only a test
this is another test
this is another test and only another only

i'd like my file to look like this:

this is a test.
this is a test and only a test.
this is another test.
this is another test and only another only.
# 2  
Old 11-18-2008
Code:
sed 's/$/\./'  my_input_filename  > newfilename

# 3  
Old 11-18-2008
jim,
thanks. i also found answer on this site as well.

cat <filename> | sed s/$/"\|"hello/g > new_file.txt
# 4  
Old 11-18-2008
jim,

i am new to shell script. $/\ = end of line, right ?

what if i want insert beginning of each line ?

thank you for your help.
# 5  
Old 11-18-2008
^ - start
$ - end
# 6  
Old 11-18-2008
Ikon,

thank you much.
# 7  
Old 11-18-2008
using Perl:
Code:
perl -pi -e 's/$/\./' filename

 
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