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06-05-2007, 06:58 AM
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#16
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Moderator
Registered: Feb 2004
Location: Outside Paris
Distribution: Solaris 11.4, Oracle Linux, Mint, Debian/WSL
Posts: 9,795
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USER doesn't keep the login username after "su -":
Code:
-bash-2.05b$ who am i
jlliagre console Jun 5 07:55
-bash-2.05b$ cat /etc/redhat-release
CentOS release 3.7 (Final)
-bash-2.05b$ echo $USER
jlliagre
-bash-2.05b$ su -
-bash-2.05b# who am i
jlliagre console Jun 5 07:55
-bash-2.05b# echo $USER
root
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06-05-2007, 07:00 AM
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#17
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Member
Registered: Aug 2006
Location: England Somewhere
Distribution: Mandriva, PCLinuxOS, Karoshi, Suse, Redhat, Ubuntu
Posts: 518
Original Poster
Rep:
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thats very strange it has for me??
i think let me just double check on that
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06-05-2007, 07:04 AM
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#18
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Member
Registered: Aug 2006
Location: England Somewhere
Distribution: Mandriva, PCLinuxOS, Karoshi, Suse, Redhat, Ubuntu
Posts: 518
Original Poster
Rep:
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thats interesting if i use "su" i can use the $USER and it will stay as origional user, if i "su -" then use $USER it will change to root. And if i kdesu like i am now i guess it must keep origional user as well because my script works properly so it must keep $USER as origional, you try it with "su" and not "su -"
let me know
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06-05-2007, 04:04 PM
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#19
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Moderator
Registered: Feb 2004
Location: Outside Paris
Distribution: Solaris 11.4, Oracle Linux, Mint, Debian/WSL
Posts: 9,795
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"su -" is clearing all the environment variables by design and setting some of them like USER.
"info su" will tell you.
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06-05-2007, 04:15 PM
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#20
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Member
Registered: Aug 2006
Location: England Somewhere
Distribution: Mandriva, PCLinuxOS, Karoshi, Suse, Redhat, Ubuntu
Posts: 518
Original Poster
Rep:
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thanks for that, it is interesting.
Thanks for everything everyone STARS 
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10-12-2007, 04:51 AM
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#21
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Member
Registered: Oct 2004
Location: Germany
Distribution: Debian
Posts: 274
Rep:
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this variable is set by bash, so if you use #!/bin/bash as first line of your script, everything should be fine. see "man bash" for other builtin variables...
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