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renaming files or adding a name in the beginning of all files in a folder

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# 1  
Old 09-09-2010
renaming files or adding a name in the beginning of all files in a folder
Hi All

I have a folder that contains hundreds of file with a names

Code:
3.msa
4.msa
21.msa
6.msa
345.msa
456.msa
98.msa
...
...
...

I need rename each of this file by adding "core_" in the begiining of each file such as

Code:
core_3.msa
core_4.msa
core_21.msa
core_6.msa
core_345.msa
core_456.msa
core_98.msa

Please let me know the best way to peform this filename change in a folder.

LA
# 2  
Old 09-09-2010
Code:
shopt -s nullglob
for f in *.msa
do
  echo mv "$f" "core_${f}"
done

# 3  
Old 09-09-2010
Thanks, but it is not working. It just writes mv commands but not executing. Let me know what might have occurred
# 4  
Old 09-09-2010
if the code is successful, remove the echo from it.
# 5  
Old 02-22-2011
TRY
Code:
for i in `ls *.msa`
do
  mv $i core_$i
done

Last edited by Franklin52; 02-22-2011 at 08:22 AM.. Reason: Please use code tags, thank you
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