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$PWD vs `pwd`

 
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# 8  
Old 01-18-2012
just for peace:
aix 4.2.1:
Code:
ge2:/home/vbe $ cd /u
ge2:/u $ pwd
/u
ge2:/u $ /usr/bin/pwd
/home
ge2:/u $ pwd -P
/home
ge2:/u $ oslevel
4.2.1.0

AIX 6:
Code:
n12:/u $ pwd
/u
n12:/u $ pwd -P
/home
n12:/u $ oslevel
6.1.0.0
n12:/u $ /usr/bin/pwd
/home
n12:/u $ echo $PWD
/u

sparc solaris 10:
Code:
lo4:/export/home/vbe $ cd /bin
lo4:/bin $ pwd
/bin
lo4:/bin $ /usr/bin/pwd
/usr/bin
lo4:/bin $ pwd -P
/usr/bin
lo4:/bin $ uname -r
5.10


Redhat 5 entreprise:
Code:
rh5:/usr/tmp $ pwd
/usr/tmp
rh5:/usr/tmp $ pwd -P
/var/tmp
rh5:/usr/tmp $ echo $PWD
/usr/tmp
rh5:/usr/tmp $ /usr/bin/pwd
-ksh: /usr/bin/pwd: not found [No such file or directory]
rh5:/usr/tmp $ /bin/pwd
/var/tmp
rh5:/usr/tmp $  
rh5:/usr/tmp $ uname -r
2.6.18-238.9.1.el5

Last edited by vbe; 01-18-2012 at 09:24 AM.. Reason: add rh5
These 2 Users Gave Thanks to vbe For This Post:
methyl pandeesh
# 9  
Old 01-18-2012
Yes Methyl!!
Code:
pwd -P

makes the difference.
Code:
pandeeswaran@ubuntu:~/lnktraining$ pwd
/home/pandeeswaran/lnktraining
pandeeswaran@ubuntu:~/lnktraining$ pwd -P
/home/pandeeswaran/training

In my system , i am not able to find /usr/bin/pwd command.
Code:
pandeeswaran@ubuntu:~/lnktraining$ /usr/bin/pwd
bash: /usr/bin/pwd: No such file or directory

Thanks.

Now i get the differences.
I guess in most of the linux systems,
Code:
/usr/bin/pwd

command is not usually available.

Thank you very much!
Last edited by pandeesh; 01-18-2012 at 11:12 AM.. Reason: Added some more points
# 10  
Old 01-18-2012
You will find /usr/bin/ on all UNIx system that a SVR4 compliant for in the SVR4 file system layout, the directory /usr deifinition is: Sharable operating system commands, libraries and documentation.
To not let people panic at the time when migrating to the new structure, links were provided for compatibility. HP had even what they called "transition links" ( HP-UX 9 to HP-UX10...)
Linux are not SVR4 compliant...
 
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