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Find all the unique file extensions

 
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# 1  
Old 11-17-2009
Error Find all the unique file extensions
Hi

How can i find the unique list of file extensions in a folder/subfolders

e.g.
MAIN/
a.txt
b.txt
a.clas
a.java
b.class
a.txt.112
c.12.ram.jar


i just need to get the below out irrespective of file being present in folder or subfolders

txt
clas
java
class
txt.112
12.ram.jar
# 2  
Old 11-17-2009
Code:
# find directory_name -exec basename {} \; |  grep  '\.' | sed 's/^[^.]*\.//g' > extension_file
# uniq extension_file

# 3  
Old 11-17-2009
Thanks
it worked fine -
find . -exec basename {} \; | grep '\.' | sed 's/^[^.]*\.//g' | sort | uniq


just wondering why below didnt work
find . -type f | xargs basename
it just showed empty lines
[actually i am more habitual of using xargs instead of -exec, is there any issue ]
# 4  
Old 11-17-2009
find with xargs can only be used if the command can handle multiple input parameters, in this case a list of files. This is not the case for basename. The man page synopsis says:
Code:
basename NAME [SUFFIX]

# 5  
Old 11-17-2009
"find with xargs can only be used if the command can handle multiple input parameters, in this case a list of files."

They say you learn something new everyday. I guess thats my lesson.
# 6  
Old 11-17-2009
You can tell xargs to use only one arg at a time.

Either of

Code:
find . -type f | xargs -n1 basename

or
Code:
find . -type f | xargs -I{} basename {}

will work.
 
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