[rancid] su - rancid doesn't work.. What am I doing wrong here?

[Sam Munzani]

Hi,

Please tell me what am I doing wrong here? Its simple thing but for some 
reason it doesn't work.

smunzani at ubuntu:/var/lib/rancid$ sudo bash
root at ubuntu:/var/lib/rancid# id
uid=0(root) gid=0(root) groups=0(root)
root at ubuntu:/var/lib/rancid# su - rancid
root at ubuntu:/var/lib/rancid# id
uid=0(root) gid=0(root) groups=0(root)
root at ubuntu:/var/lib/rancid# more /etc/passwd
<< snip >>
rancid:x:111:122::/var/lib/rancid:/bin/false


I tried to su from my own account too and that doesn't work either.
smunzani at ubuntu:/var/lib/rancid$ su - rancid
Password:
smunzani at ubuntu:/var/lib/rancid$ id
uid=1000(smunzani) gid=1000(smunzani) 
groups=4(adm),20(dialout),24(cdrom),25(floppy),29(audio),30(dip),44(video),46(plugdev),107(fuse),119(lpadmin),120(admin),1000(smunzani)

Why is not my su - rancid command working here? Any suggestions on what 
should I be looking at? I am running ubuntu server 8.0.4.

Thanks,
Sam
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