I'm currently studying Bash shell and have encountered command ls -F. I know it ls function is to append indicators to items lists, so to distinguish between different file types. I know that / is appended to directory and * is appended to executable files. But I have checked the manual page on ls command but couldn't find any information on indicator =>@|.
Could someone tell me what they represent? And it would be even better if can inform me where to find this kind of information when in need.
11 Answer
Try info ls, under "What information is listed":
‘-F’ ‘--classify’ ‘--indicator-style=classify’ Append a character to each file name indicating the file type. Also, for regular files that are executable, append ‘*’. The file type indicators are ‘/’ for directories, ‘@’ for symbolic links, ‘|’ for FIFOs, ‘=’ for sockets, ‘>’ for doors, and nothing for regular files. Do not follow symbolic links listed on the command line unless the ‘--dereference-command-line’ (‘-H’), ‘--dereference’ (‘-L’), or ‘--dereference-command-line-symlink-to-dir’ options are specified. 
