automate ssh login

[James]

hello,


I need to write a perl script to automate a ssh login. the script is run by system user 'lp' which
doesn't have a home directory. 

i was using Net::SSH::Perl but the implementation is too slow in my case. so i thought i would opt
for ssh Key authtication.  since 'lp' doesn't have a home dir, i have to go all the way trouble to
do login from a user who has a home dir, then use the  generated .ssh dir for the 'lp' user. it's
a pain to set it up but it works. 

but this script will be used for other department too and log in to different server. i am
wondering if there is a way as easy as to provide user name and password from the ssh command line
?  or, works better and easiser set up in my case ?

thanks,

Qiang

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