Ls() Only Displays 1024 Files

I accidentally typed l instead of ls today and found that the command still printed a list of the files in my current directory. Trying l --help brings up the help file for ls suggesting that l is . How can i list files with a filename ending with last character and with .txt extension ?

But i need to get only a. The ls command on non-embedded linux systems and cygwin, also available on some other unices) has an option to hide some files, based on their names. I see that ls [0-9] would list all the files/directories with numbers in its names so shouldn't ls [^0-9] list all the files/directories without numbers in the mi.

Is it possible to use ls in unix to list the total size of a sub-directory and all its contents as opposed to the usual 4k that (i assume) is just the directory file itself?