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Shell Programming and Scripting

how to run a command line with another user without prompts for password

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# 1  
Old 10-02-2012
how to run a command line with another user without prompts for password
Hi, I'm writing a script,
in the script I need to use tcpdump to capture some packets
however it needs root priviledge
my computer is configured by school and I have no real root priviledge

so I can't use sudo on my computer,like
Code:
sudo tcpdump ......
I have to use a limited root username su4098
Code:
su su4098
and then use user su4098 as the root, with su4098 I can use tcpdump


since I want to run the tcpdump command in a script, I dont want to input the password mannualy

how can I run tcpdump command with su4098 without mannually input the password？
or specifically how can I change my username to su4098 without mannually inputing the password?

thanks!
# 2  
Old 10-02-2012
To do that without a password, ask your administrator to configure sudo to allow that user to use that command without a password.
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