Help answer threads with 0 replies.
Go Back > Forums > Linux Forums > Linux - Newbie
User Name
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!


  Search this Thread
Old 06-30-2007, 10:40 AM   #1
rich paul fox
LQ Newbie
Registered: Jun 2007
Posts: 3

Rep: Reputation: 0
problem navigating man files with in bash

Hi, I am slavishly trying to follow a linux book (Prep Kit General Linux 1).
I have just started and am attempting to navigate the man pages.
I have attempted to enter 'man -K password' hoping to see a page with a list of pages querying if I wish to view them.
When I do this I get an error message:

richard@richard-desktop:~$ man -K password
man: invalid option -- K
usage: man [-c|-f|-k|-w|-tZT device] [-i|-I] [-adlhu7V] [-Mpath] [-Ppager]
[-Cfile] [-Slist] [-msystem] [-pstring] [-Llocale] [-eextension]
[section] page ...
-a, --all find all matching manual pages.
-d, --debug emit debugging messages.
-e, --extension limit search to extension type `extension'.
-f, --whatis equivalent to whatis.
-k, --apropos equivalent to apropos.
-w, --where, --location print physical location of man page(s).
-W, --where-cat,
--location-cat print physical location of cat file(s).
-l, --local-file interpret `page' argument(s) as local filename(s).
-u, --update force a cache consistency check.
-i, --ignore-case look for pages case-insensitively (default).
-I, --match-case look for pages case-sensitively.
-r, --prompt string provide the `less' pager with a prompt
-c, --catman used by catman to reformat out of date cat pages.
-7, --ascii display ASCII translation of certain latin1 chars.
-E, --encoding encoding use the selected nroff device and display in pager.
-t, --troff use groff to format pages.
-T, --troff-device device use groff with selected device.
-H, --html use lynx or argument to display html output.
-Z, --ditroff use groff and force it to produce ditroff.
-X, --gxditview use groff and display through gditview (X11):
-X = -TX75, -X100 = -TX100, -X100-12 = -TX100-12.
-D, --default reset all options to their default values.
-C, --config-file file use this user configuration file.
-M, --manpath path set search path for manual pages to `path'.
-P, --pager pager use program `pager' to display output.
-S, --sections list use colon separated section list.
-m, --systems system search for man pages from other unix system(s).
-L, --locale locale define the locale for this particular man search.
-p, --preprocessor string string indicates which preprocessors to run.
e - [n]eqn p - pic t - tbl
g - grap r - refer v - vgrind
-V, --version show version.

I have succesfully used the similar command with lower case 'k', but using the upper case gives me this.

I am using linux mint cassandar in a terminal in bash.

Thanks for any help please.

Rich Fox
Old 06-30-2007, 11:30 AM   #2
Senior Member
Registered: May 2006
Distribution: Caldera, CTOS, Debian, FreeBSD, Mac OS X, Mandrake, Minix, OpenBSD, Slackware, SuSE
Posts: 1,757

Rep: Reputation: 80
Unless I've mis-understood your question, just like the output says "man: invalid option -- K". Use the -k option to search the man pages. Use lowercase k, not uppercase K.
Old 06-30-2007, 04:04 PM   #3
Registered: Jun 2005
Posts: 202

Rep: Reputation: 35

man -k password | less

to list all of the appropriate pages containing password.
Also, like what bsdunix said use 'man man' to peruse through.
Finally, check out
man less (press h for movement commands) all the man pages on web


Last edited by whk; 07-04-2007 at 03:01 PM.
Old 07-02-2007, 07:11 AM   #4
LQ Guru
Registered: Aug 2004
Location: Sydney
Distribution: Centos 6.9, Centos 7.3
Posts: 17,406

Rep: Reputation: 2396Reputation: 2396Reputation: 2396Reputation: 2396Reputation: 2396Reputation: 2396Reputation: 2396Reputation: 2396Reputation: 2396Reputation: 2396Reputation: 2396
In other words (and for future ref), all Unix variants are CASE-SENSITIVE at the cmd line.
Generally though, lowercase is the one to use, at least for cmd names. Cmd options/switches eg -k can be either case, BUT, the lower and uppercase versions will have completely different effects, as shown by the output you got from man.
Again, on average, most options will be lowercase.

Last edited by chrism01; 07-02-2007 at 08:59 PM.
Old 07-02-2007, 07:24 AM   #5
Registered: Jun 2004
Location: Ashland, KY
Distribution: Debian, Puppy/Slacko
Posts: 351

Rep: Reputation: 31
Yeah Linux is case sensitive period in basically every aspect. And you will find for some commands (not all of them, but most) that a lowercase option does one thing while an uppercase one does something else. This is why doing a help option first will be helpful so you know what works with a particular command. Another thing to consider too is that Linux does not handle filenames/directoy names the same way Windows does. Like in Windows if a directory contained spaces you could put the spaces say in a cd command and it goes on its merry way. In Linux you can't and it will say the directory does not exist. As a solution I usually put a directory with spaces in double quotes so that way it will work.
Old 07-02-2007, 10:26 AM   #6
LQ 5k Club
Registered: May 2003
Location: London, UK
Distribution: Debian "Jessie"
Posts: 6,087

Rep: Reputation: 407Reputation: 407Reputation: 407Reputation: 407Reputation: 407
If you have KDE, you can use konqueror to format, display, and search your manpages.
Open konqueror, put man:password in the address bar and press return. It's good.

Last edited by tredegar; 07-02-2007 at 12:09 PM. Reason: "Disable smilies in text" !
Old 07-02-2007, 08:58 PM   #7
LQ Guru
Registered: Aug 2004
Location: Sydney
Distribution: Centos 6.9, Centos 7.3
Posts: 17,406

Rep: Reputation: 2396Reputation: 2396Reputation: 2396Reputation: 2396Reputation: 2396Reputation: 2396Reputation: 2396Reputation: 2396Reputation: 2396Reputation: 2396Reputation: 2396
Also, there are complete sets of manpages, plus variations, avail on the web as html, so you might find that easier to read, especially for bash, which is just 1 humungous man page and not really usable, imho.
This Linux guide is much more readable:


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Bash scripting problem: Can't get a list of all files, including hidden ones oxi Programming 24 03-12-2007 06:19 AM
navigating through man (for example) Ian D Linux - General 1 09-01-2005 04:00 PM
Simple bash problem - checking for files and displaying the first line morrolan Programming 4 03-07-2005 10:40 AM
problem creating BASH script with files that have whitespace scattaneo Linux - General 2 11-06-2004 05:40 PM
Compiling packages on RH 7.1 causes man files to be named man.gz mmboam Linux - General 0 05-09-2001 06:47 PM > Forums > Linux Forums > Linux - Newbie

All times are GMT -5. The time now is 01:58 PM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration