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I am installing ntp latest package 4.2.8p6 by following this link http://www.linuxfromscratch.org/blfs/view/cvs/basicnet/ntp.html creating user 

groupadd -g 87 ntp &&
useradd -c "Network Time Protocol" -d /var/lib/ntp -u 87 \
         -g ntp -s /bin/false ntp

in the above command i am giving '87' as userid. Is there any reserved userid to install specific packages like ntp.

Sharath Manchala
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1 Answers1

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Unless it's hardcoded into the latest ntp (check the README), there's no special UID for ntp. On MY Ubuntu 14.04.03 (YMMV): 

$ grep ntp /etc/passwd /etc/group
/etc/passwd:ntp:x:117:129::/home/ntp:/bin/false
/etc/group:ntp:x:129:

Stock ntp runs as UID=117, GID=129 here.

UIDs less than 1000 (see man login.defs) are slightly more privileged than not (see man useradd). And, of course, there's root (UID=0).

waltinator
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