info 查看Linux info格式文件

$ info -h
Usage: info [OPTION]... [MENU-ITEM...]

Read documentation in Info format.

Frequently-used options:
  -a, --all                    use all matching manuals
  -k, --apropos=STRING         look up STRING in all indices of all manuals
  -d, --directory=DIR          add DIR to INFOPATH
  -f, --file=MANUAL            specify Info manual to visit
  -h, --help                   display this help and exit
      --index-search=STRING    go to node pointed by index entry STRING
  -n, --node=NODENAME          specify nodes in first visited Info file
  -o, --output=FILE            output selected nodes to FILE
  -O, --show-options, --usage  go to command-line options node
      --subnodes               recursively output menu items
  -v, --variable VAR=VALUE     assign VALUE to Info variable VAR
      --version                display version information and exit
  -w, --where, --location      print physical location of Info file

The first non-option argument, if present, is the menu entry to start from;
it is searched for in all 'dir' files along INFOPATH.
If it is not present, info merges all 'dir' files and shows the result.
Any remaining arguments are treated as the names of menu
items relative to the initial node visited.

For a summary of key bindings, type H within Info.

Examples:
  info                         show top-level dir menu
  info info-stnd               show the manual for this Info program
  info emacs                   start at emacs node from top-level dir
  info emacs buffers           select buffers menu entry in emacs manual
  info emacs -n Files          start at Files node within emacs manual
  info '(emacs)Files'          alternative way to start at Files node
  info --show-options emacs    start at node with emacs' command line options
  info --subnodes -o out.txt emacs
                               dump entire emacs manual to out.txt
  info -f ./foo.info           show file ./foo.info, not searching dir

Email bug reports to bug-texinfo@gnu.org,
general questions and discussion to help-texinfo@gnu.org.
Texinfo home page: http://www.gnu.org/software/texinfo/