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What is the difference between xpg4/bin and usr/bin?

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Operating Systems Solaris What is the difference between xpg4/bin and usr/bin?
# 1  
Old 07-26-2011
What is the difference between xpg4/bin and usr/bin?
Hi Experts,

I found that the same commands(sort, du, df, find, grep etc.) exists in both dir.

What is the difference to use them?

i.e: to use
Code:
xpg4/bin/grep

and
Code:
usr/bin/grep

My OS version is SunOS 5.10

Regards,
Saps
Last edited by saps19; 07-26-2011 at 01:01 PM.. Reason: OS Version
# 2  
Old 07-26-2011
Those are different variants of grep. Check man grep for differences between them.
# 3  
Old 07-26-2011
I checked, that means usr/xpg4/bin/<commands> are more advanced(or say, more powerful) than usr/bin/<commands>.

Please correct me if I understood it wrong.
# 4  
Old 07-26-2011
Yes, it is true in most of the cases.
This User Gave Thanks to bartus11 For This Post:
saps19
# 5  
Old 07-26-2011
More precisely they provide variants of commands complying with different standards:

/usr/bin: SVID/XPG3
/usr/xpg4/bin: POSIX.2/POSIX.2a/SUS/SUSv2/XPG4
/usr/xpg6/bin: POSIX.1-2001/SUSv3

Standard compliance doesn't necessarily means the commands are more or less powerful, just they have slight differences in their options and behavior.
These 2 Users Gave Thanks to jlliagre For This Post:
Android Control saps19
# 6  
Old 07-27-2011
Quote:
Originally Posted by jlliagre
More precisely they provide variants of commands complying with different standards:

/usr/bin: SVID/XPG3
/usr/xpg4/bin: POSIX.2/POSIX.2a/SUS/SUSv2/XPG4
/usr/xpg6/bin: POSIX.1-2001/SUSv3

Standard compliance doesn't necessarily means the commands are more or less powerful, just they have slight differences in their options and behavior.
Thank you, I have just the following query:
If we use simply grep <file_name> or find <path> -name <search_string>, in those cases which commands will execute by default? usr/bin<commnads> or usr/xpg4/bin/<commnads>?
# 7  
Old 07-27-2011
It depends on which path you have defined first in you $PATH variable. Check it in the output of
Code:
echo $PATH
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