Manuals or other information for system users detailing software features and functionality.

learn more… | top users | synonyms

13
votes
3answers
8k views

Difference between help, info and man command

I know that these command will help to get syntax and options for commands but my question is that how they differ from each other?
17
votes
8answers
2k views

Beginning to learn Unix and Linux [closed]

I am a beginner, I want to learn unix and linux, and be a professional. Where should I start?
30
votes
4answers
3k views

How can I add man page entries for my own power tools?

I have no idea about how I can make my home-grown specialist scripts (written mostly in Bash and Perl) available through the man pages. What procedure would I have to follow, and is there a ...
11
votes
3answers
374 views

Why do some commands have man pages and other commands use --help?

Wouldn't it be more consistent if one of these always worked?
11
votes
2answers
2k views

How to document my custom bash functions and aliases?

Problem: I have multiple bash functions and aliases. I can't remember all of them off the top of my head, so I usually end up opening my .bash_functions and .bash_aliases files to find what I need. ...
2
votes
2answers
1k views

What does the `who` command result `root :0` mean?

The return value of command who will always include root :0 in X Window pts. I guess it actually means the GNOME login. Am I right? Another question is where to get this knowledge, as I don't see it ...
10
votes
2answers
980 views

Where can I find official POSIX and UNIX documentation?

I am looking for official documents on all POSIX standards and specifications. I would like to be able t read the docs to get a better understanding of UNIX systems and how they work at a low level. ...
38
votes
3answers
2k views

Purpose of “ASCII text, with overstriking” file format

After downloading the source code for Bash, I was browsing through the doc directory and came across the following files: bash.1 is a regular troff file used to build the man page. bash.0 is like a ...
3
votes
4answers
1k views

How to search the whole manual pages on Linux?

Sometimes I need to look up certain words through all the manual pages. I am aware of apropos, but if I understand its manual right, it restricts search to the descriptions only. Each manual page ...
8
votes
3answers
967 views

viewing info documentation with vim

I'm trying to use the ManPageView addon to view info documentation within vim. Although I find ManPageView very useful for, well, viewing manpages, its info-reading functionality doesn't seem to work ...
5
votes
2answers
722 views

How do I look up exit codes for applications?

I'm having difficulty locating a comprehensive up-to-date list of error codes from Bash. e.g.: $ udevadm info /dev/sdx; echo Exit code $? Unknown device, --name=, --path=, or absolute path in /dev/ ...
38
votes
20answers
17k views

Tricks and tips for finding information in man pages

Does anyone have any tricks and tips for finding information in man pages?
14
votes
6answers
11k views

What are good online resources for learning shell scripting? [closed]

I am a beginner to shell scripting. I have not yet hardly coded a single program, but I am interested in learning it completely. Can anyone suggest some good online resources which will guide me?
6
votes
4answers
2k views

Any good LVM tutorial?

I'm planning to user LVM in my next Linux installation, any links to good LVM tutorials/guides/FAQs would be welcomed.
7
votes
1answer
6k views

Understand `compgen` builtin command

From help compgen: $ help compgen compgen: compgen [-abcdefgjksuv] [-o option] [-A action] [-G globpat] [-W wordlist] [-F function] [-C command] [-X filterpat] [-P prefix] [-S suffix] [word] ...
10
votes
3answers
7k views

Where is “showing the output of the 'ls' command vertically” documented?

I found out it's possible to show the output of the ls command vertically using the -1 switch: $ ls -1 But couldn't find it in the manual of ls. Is it a secret option?
3
votes
3answers
308 views

Interactive command usage reference: do you generally have that on Unix?

The question of why some commands rely on manpages whereas others rely on something like the --help flag for providing command usage reference is not new. There is usually a difference in scope ...
8
votes
1answer
529 views

What is the font used for GNU documentation?

I am interested in learning how documentation for GNU related software is written, and am wondering what type of font is used in their PDF documentation? (for instance, the GCC manual here: ...
4
votes
1answer
113 views

POSIX usage standards for requiring at least one optional arg

So, I'm writing a CLI for an API, and I ran into a point where one of the commands support has two optional arguments, id and fields I want to know how to show that these arguments are optional, BUT, ...
4
votes
3answers
111 views

How to match name exactly with Bash's `help` builtin?

It seems the Bash built-in help command help does some really strange globbing: help read shows the documentation for read, readarray and readonly. help rea? shows only the documentation for read. ...
3
votes
5answers
1k views

missing man pages of some commands

Typing man alias gives me No manual entry for alias The same thing goes for export and eval. At first I thought it only happens to shell built-in commands but man echo gives me the man page. ...