change *.foo to *.bar in unix one-liner

I am trying to convert all files in a given directory with suffix ".foo" to files containing the same basename but with 开发者_如何学JAVAsuffix modified to ".bar". I am able to do this with a shell script and a for loop, but I want to write a one-liner that will achieve the same goal.

Objective:

  Input: *.foo

  Output: *.bar

This is what I have tried:

find . -name "*.foo" | xargs -I {} mv {} `basename {} ".foo"`.bar

This is close but incorrect. Results:

  Input: *.foo

  Output: *.foo.bar

Any ideas on why the given suffix is not being recognized by basename? The quotes around ".foo" are dispensable and the results are the same if they are omitted.

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Although basename can work on file extensions, using the shell parameter expansion features is easier:

for file in *.foo; do mv "$file" "${file%.foo}.bar"; done

Your code with basename doesn't work because the basename is only run once, and then xargs just sees {}.bar each time.

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for file in *.foo ; do mv $file echo $file | sed 's/\(.*\.\)foo/\1bar/' ; done

Example:

$ ls
1.foo  2.foo
$ for file in *.foo ; do mv $file `echo $file | sed 's/\(.*\.\)foo/\1bar/'` ; done
$ ls
1.bar  2.bar
$ 

---

for x in $(find . -name "*.foo"); do mv $x ${x%%foo}bar; done

---

$ for f in *.foo; do echo mv $f ${f%foo}bar; done
mv a.foo a.bar
mv b.foo b.bar

Remove echo when ready.

---

If you have installed mmv, you can do

mmv \*.foo \#1.bar

.

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Why don't you use "rename" instead of scripts or loops.

RHEL: rename foo bar .*foo

Debian: rename 's/foo/bar/' *.foo