How to use commands to batch modify file names under CentOS?

I encountered a new problem today. What if I want to cut off the suffixes in batches?

The specific commands are as follows:

find -name "*.txt" |for i in *;do mv $i `echo $i |sed 's/\.txt//g'`;done

find -name "*.txt" |awk -F'.' '{print $1} |xargs mv {}.txt {}

If you only want to modify the suffix name, use rename. The command is as follows:

rename .txt .bk *

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