Linux Shell Line Flow programming practice

Many of the commands in Linux are very handy to use, especially when you're doing batch processing. (Saying that the program is not complicated, Windows has not engaged in a good shell?)

Here are some common applications of shell operations, the use and interpretation of specific commands are not listed, there are many good tutorials on the web.

Batch Rename

If there are several. wma files under the current directory, I want to convert them to. mp3 Files in bulk

Example: 001.wma-001.mp3

Solution:

Awk

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1	ls * | awk -F ‘.‘ ‘{print "mv "$0" "$1".mp3"}‘| bash

Perl

Notation 1

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1	ls * | perl -e ‘while(<>){chomp;$old=$_;s/wma/mp3/;print "mv $old $_\n"}‘| bash

Notation 2

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1	ls * | perl -e ‘while(<>){chomp;$old=$_;s/mp3/wma/;rename $old, $_;}‘

Not to be continued ...