Understanding Logic and Flow better Post: 302330368

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Top Forums Shell Programming and Scripting Understanding Logic and Flow better Post 302330368 by kshji on Wednesday 1st of July 2009 04:00:08 AM

07-01-2009

Registered User

I'm sure there are pages which include helps for you.

I have done something, but language is mostly finnish.
Karjalan ATK-Awot Oy
Ofcourse you can look those pages using Googles translator
Google K��nt�j�

if command I have done page using my english. Why ? If has used so often like programlanguage if. If command is different. Same situation with ex. case.
Karjalan ATK-Awot Oy

Big idea is to understand that everyline is commandline = works same way even command is builtin if, case, ... or something else like date, ls, rm, ...
- filename generation
- pipe
- io-redirection
- argument delimeter !!! (ex. if ...)
- ...

Example

Code:

ls * 
echo *
if cp x y 2>/dev/null ; then
   print ok
else
   print not so good
fi

I'm sure, you get other links also.

kshji

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LEARN ABOUT DEBIAN

sg

SG(1)								   User Commands							     SG(1)

NAME

       sg - execute command as different group ID

SYNOPSIS

       sg [-] [group [-c ] command]

DESCRIPTION

       The sg command works similar to newgrp but accepts a command. The command will be executed with the /bin/sh shell. With most shells you may
       run sg from, you need to enclose multi-word commands in quotes. Another difference between newgrp and sg is that some shells treat newgrp
       specially, replacing themselves with a new instance of a shell that newgrp creates. This doesn't happen with sg, so upon exit from a sg
       command you are returned to your previous group ID.

CONFIGURATION

       The following configuration variables in /etc/login.defs change the behavior of this tool:

       SYSLOG_SG_ENAB (boolean)
	   Enable "syslog" logging of sg activity.

FILES

       /etc/passwd
	   User account information.

       /etc/shadow
	   Secure user account information.

       /etc/group
	   Group account information.

       /etc/gshadow
	   Secure group account information.

SEE ALSO

       id(1), login(1), newgrp(1), su(1), gpasswd(1), group(5), gshadow(5).

shadow-utils 4.1.5.1						    05/25/2012								     SG(1)