Visit Our UNIX and Linux User Community


Using man command


 
Thread Tools Search this Thread
Top Forums UNIX for Beginners Questions & Answers Using man command
# 1  
Old 06-23-2019
Using man command

hi linux expert


how to use man command for get help about "extended regular expression"?


many thanks
samad
# 2  
Old 06-23-2019
man grep has a section on the e option, ERE or POSIX extended regular expressions. There is also perl regex which some linux systems can invoke. This leads to confusion for new folks.

To get a real background you need to to do a quick read outside of the man application. This one explains with examples the differences for ERE vs. plain (regular):

POSIX Basic and Extended Regular Expressions
These 2 Users Gave Thanks to jim mcnamara For This Post:
# 3  
Old 06-24-2019
man 7 regex fully explains "modern" (extended) regular expressions and how they differ from "basic" REs.

Previous Thread | Next Thread
Test Your Knowledge in Computers #471
Difficulty: Medium
Google recommends that users configure Google Public NTP together with non-leap-smearing NTP servers.
True or False?

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Description of the option print0 in the command find (man page)

This is the description of the option -print0 fon the command find in the man page: What does the "True" in the first line of the description mean? (3 Replies)
Discussion started by: puertas12
3 Replies

2. UNIX for Dummies Questions & Answers

MAN command for various shells

Whenever I run manual page on a command I get information about arguments, syntax and so on. However, I wounder if that information is valid only for a certain shell and if yes, then for which one? In other words, would I have different man outputs for csh, ksh, bash and others? Thanks (7 Replies)
Discussion started by: rdogadin
7 Replies

3. UNIX for Dummies Questions & Answers

Unix man command to find out month of the year?

how can i display month of the year i was born with using man command? thanks (2 Replies)
Discussion started by: janetroop95
2 Replies

4. Homework & Coursework Questions

man command output to a txt file

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: I am trying to outut the man command output into a text file which will help me for future reference. 2.... (8 Replies)
Discussion started by: hariniiyer300
8 Replies

5. Shell Programming and Scripting

Man command

How to get only the options and arguments of a command excluding the descriptive help? (1 Reply)
Discussion started by: mayur_verma
1 Replies

6. Linux

man command

Hey people do u know how to disable the man command in linux??? i am not able to do anythg apart from disabling the permission for /usr/bin/... i dont wanna uninstall the man / man pages also... this has been one of the toughest challenges i have come across in linux... can anybody... (5 Replies)
Discussion started by: linux.user
5 Replies

7. Solaris

Creating a Man page for a command

Hi, I would like to develop a man page as the one we usually get when we execute man <command name>. This man page will be for a samll utility that i have written. If this is not possible then what are the available possibilites for creating such help. thanks in advance. (2 Replies)
Discussion started by: raghu.amilineni
2 Replies

8. Programming

man pages of any command from a c program in unix

i wanted to display the man pages of any command in unix from a c program.can some one help me plzzzzzz. (2 Replies)
Discussion started by: spanduu
2 Replies

9. UNIX for Dummies Questions & Answers

Man command

I know what the man command does and I know how to use it, but i am trying to find an answer to a question. When you run man on an other command it will give you the first page on your screen and then you hit the space bar and it brings up the second page. What command option would I use if I... (5 Replies)
Discussion started by: shipoffools
5 Replies

Featured Tech Videos