Shell – How to get exact file size and file name

What about paste file{1,2}| column -s $'\t' -tn?

looooooooong line line  hello
line                    world

• This is telling column to use Tab as columns' separator where we takes it from the paste command which is the default seperator there if not specified; generally:

  paste -d'X' file{1,2}| column -s $'X' -tn

  where X means any single character. You need to choose the one which granted that won't be occur in your files.

• The -t option is used to determine the number of columns the input contains.

• This will not add long tab between two files while other answers does.

• this will work even if there was empty line(s) in file1 and it will not print second file in print area of file1, see below input/ouput

  Input file1:

  looooooooong line
  
  line
  

  Input file2:

  hello
  world
  

  Output:

  looooooooong line  hello
                     world
  line
  

Unless GNU utilities are installed, your best bet is probably perl on those traditional systems:

perl -MPOSIX -MFcntl -MFile::stat -le '
  setlocale(LC_TIME, "C");
  for (<*>) {
    $s = lstat $_ or die "$_: $!\n";
    print "$_ " . uc(strftime("%d-%b-%Y %I:%M:%S %p", localtime $s->mtime))
      if S_ISDIR($s->mode)
  }'

That's perl's interface to the standard POSIX lstat() system call that retrieves file metadata and strftime() function to format dates.

See perldoc POSIX, perldoc -f lstat, perldoc -f stat, man lstat, man strftime for details. We use the C locale for LC_TIME so we get English month names and PM/AM regardless of the preferences of the user.

If zsh is installed:

zsh -c 'zmodload zsh/stat
        LC_ALL=C stat -nA times -LF "%d-%b-%Y %I:%M:%S %p" +mtime -- *(/) &&
          for f t ($times) printf "%s\n" "$f: ${(U)t}"'

Above, we're using perl's uc() and zsh's ${(U)var} to convert the timestamps to uppercase. On GNU systems, you could have used %^b for a all-uppercase month abbreviation, but it doesn't look like it's available on HP/UX.