This might be a silly one, but I'm unable to get the required output.
I've a file named Abc_sfgf_kjwefgk.txt20180929_040845 in a directory.
I'm trying to list the file using the command:
ls -l Abc_sfgf_kjwefgk.txt[0-9]{8}_[0-9]{4}
But it's giving me error: ls: cannot access 'Abc_sfgf_kjwefgk.txt[0-9]{8}_[0-9]{4}': No such file or directory
While, with this command:ls -l Abc_sfgf_kjwefgk.txt[0-9]*?_[0-9]*?
It's giving me the correct result.
What's the problem with my initial command?
Seems like everything is okay with your SECOND command. Here you correctly use globbing.
If you want to parse ls, then you should use smth like this:
ls | grep -E 'Abc_sfgf_kjwefgk.txt[0-9]{8}_[0-9]{4}'
egrep..uhhh.{8} is a literal string. Since you don't have any file names containing { the glob regex [0-9] does not expand. Your command is literally ls -l 'Abc_sfgf_kjwefgk.txt[0-9]{8}_[0-9]{4}'. Since there is no file Abc_sfgf_kjwefgk.txt[0-9]{8}_[0-9]{4} you get an error message from ls, that there is no such file.
You probably wanted to write
ls -l Abc_sfgf_kjwefgk.txt[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]_[0-9][0-9][0-9][0-9]
or
find -maxdepth 1 -regextype egrep -regex '.*/Abc_sfgf_kjwefgk.txt[0-9]{8}_[0-9]{4}' \
-exec ls -l {} \;
ls -l Abc_sfgf_kjwefgk.txt[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]_[0-9][0-9][0-9][0-9], then of course it seemed too lengthy...i thought there would be some better way to do it ;-). Thanks for the answer.