Listing files with a certain extension

Question

I'm suppose to write a command that would list all files that end in .tx with an optional t at the end.

So far all I got is listing the files that end in .tx which is:

ls *.tx

Now my problem is how do I add the optional t at the end.

What do you expect in here? To list files ending in .tx and .txt or really want to know if an "optional" character can be attached? — tachomi
– tachomi, Commented Feb 9, 2016 at 22:27
@tachomi like I already under how to show files ending in .tx but what command will list files that end in .tx with an optional t at the end — shawn edward
– shawn edward, Commented Feb 9, 2016 at 22:31

Hauke Laging · Accepted Answer · 2020-09-14 09:39:12Z

4

In bash with shopt -s extglob you can do this:

ls -d *.tx?(t)

In bash with shopt -s nullglob you can do this:

ls -d *.txt *.tx

But this will show the directory content if no such file exists.

If ls is not required:

find . -type f '(' -name '*.txt' -o -name '*.tx' ')'

This would show files in subdirectories, too. With GNU find this can be avoided with find . -maxdepth 1.

answered Feb 9, 2016 at 22:29

Hauke Laging

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