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How to Remove comma as last character in end of last line of file?

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# 1  
Old 02-25-2013
How to Remove comma as last character in end of last line of file?
how to Remove comma as last charector in end of last line of file:



example:

input file
---------------

aaaaaa,
bbbbbb,
cccc,
12345,

____________

output file :
-----------
aaaaaa,
bbbbbb,
cccc,
12345
-----------
# 2  
Old 02-25-2013
Code:
 sed '$s/,$//' filename

# 3  
Old 02-25-2013
tr ,


I have given2 space after comma
# 4  
Old 02-25-2013
thanks Subbeh !!! it worked for me Smilie
Could you please explain how it works ?
# 5  
Old 02-25-2013
Quote:
Originally Posted by RahulJoshi
thanks Subbeh !!! it worked for me Smilie
Could you please explain how it works ?
It's pretty simple, the first '$' specifies the last line, then you tell sed to remove ',$' ($ is end of line) from the string.
# 6  
Old 02-25-2013
thanks for advise ....actually was not in touch with unix script from 1 year Smilie
anyway thanks for prompt checking and replying on site
# 7  
Old 02-25-2013
Using awk
Code:
awk 'FNR==NR{tot=NR; next} FNR==tot{sub(/,/,"")}1' file file
aaaaaa,
bbbbbb,
cccc,
12345

another variation
Code:
awk 'NR==tot{sub(/,/,"")}1' tot=$(wc -l < file) file

Last edited by Jotne; 02-25-2013 at 06:05 AM..
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