列出具有数字名称的文件

Question

How do I list files that have only numeric names eg

1111 
2342 
763
71

I have tried ls -l [0-9]* but this seems to bring all file names that start with a digit and can have anything in their name after a digit.

Answer 1

First, turn on Bash's extglob option:

shopt -s extglob

Then use this pattern:

ls -l +([0-9])

Read more about extended pattern matching in the Bash Reference Manual .

Answer 2

Using GNU find :

find . -type f -regex './[0-9]*$'

This uses a regular expression rather than a filename globbing pattern. The expression ./[0-9]*$ matches ./ (the current directory) followed by only digits until the end ( $ ).

If you need to stop find from going into subdirectories, add -maxdepth 1 .

If you want ls -l -like behaviour, add -ls at the very end.

Answer 3

With opposite operation : ignoring filenames with non-digits [^0-9] :

ls -1 --ignore=*[^0-9]*

--ignore=PATTERN
do not list implied entries matching shell PATTERN

Answer 4

This command will be safest option always!

ls | grep -E '^[0-9]+$'

Adding few sample test cases for audiences to make it clear.

$ls
1       12222e      2       B.class     Test.java   file.sh     y.csv
1.txt       1a      A.class     Test.class  db_2017-08-15   file.txt
$ ls  | grep -E '^[0-9]+$'
1
2