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I have two csv files example

t_test_yyyyymmdd.csv
t_test_type_yyyyymmdd.csv

I want to make the command ls to search only the file t_test_yyyyymmdd.csv

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    Please edit your question and clarify. Do you mean you have many files with different dates? Are you just looking for ls t_test_[0-9]*? – terdon Feb 8 at 10:55
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    Thank you it works very well – rauyan_13 Feb 8 at 11:03
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If you want to list all files whose name starts with t_test_ and then has a number, you can use:

ls t_test_[0-9]*

The [0-9] is a character class that matches any number, and the * means "one or more times".

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  • Thank you it works very well – rauyan_13 Feb 9 at 10:40
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Have you considered using the |grep command to help your ls?

For example:

ls |grep t_test_type_yyyyymmdd.csv

grep is a very powerful tool for these kind of checks; more information about the grep command here: https://www.redhat.com/sysadmin/how-to-use-grep.

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