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Add if judgment so that those who do not meet the conditions will not be dealt with. Or what has been dealt with will not be dealt with again.

${I%% .*} take the file name

Take the extension of ${ionization.}.

Capitalization of pure lowercase letters:

The code is as follows:

For i in *; do exp=$ {I%% .*}; if [[$o = ~ ^ [Amurz] + $]]; then mv $I $(echo $o | tr [amurz] [Amurz]). $exp; fi; done

With the extension:

The code is as follows:

For i in *; do exp=$ {I%% .*}; if [[$o = ~ ^ [Amurz] + $]]; then mv $I $(echo $o | tr [Amurz] [Amurz]). $(echo $exp | tr [Amurz] [Amurz]); fi; done

Start with a lowercase letter

The code is as follows:

For i in *; do exp=$ {ionization.}; if ${I% .*}; if [[$o = ~ ^ [Amurz]; then mv $I $(echo $o | tr [amurz] [Amurz]). $exp; fi; done

With the extension:

The code is as follows:

For i in *; do exp=$ {I%% .*}; if [[$o = ~ ^ [Amurz]; then mv $I $(echo $o | tr [Amurz] [Amurz]). $(echo $exp | tr [Amurz] [Amurz]); fi; done

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