Bash versioning

Here is the bash command:

cp -i aaa/bbb/ccc/ddd/xxxx_{6,7}.tpl

This expands to

cp -i aaa/bbb/ccc/ddd/xxxx_6.tpl aaa/bbb/ccc/ddd/xxxx_7.tpl

This feature of bash is called Brace Expansion and can ease versioning of files based on filesystem. If you have a sequence of files with versions assigned to them as incremented part of the name, you can easily create one more with the given command:

> ls
aaa/bbb/ccc/ddd/xxxx_4.tpl
aaa/bbb/ccc/ddd/xxxx_5.tpl
aaa/bbb/ccc/ddd/xxxx_6.tpl
> cp -i aaa/bbb/ccc/ddd/xxxx_{6,7}.tpl
> ls
aaa/bbb/ccc/ddd/xxxx_4.tpl
aaa/bbb/ccc/ddd/xxxx_5.tpl
aaa/bbb/ccc/ddd/xxxx_6.tpl
aaa/bbb/ccc/ddd/xxxx_7.tpl

Even nicer usage:

cp filename{,_`date '+%F'`}