getent passwd username1 [username2 ...]Lookup database entry for an existing group:
getent group groupname1 [groupname2 ...]
Monday, June 29, 2009
HOWTO Check if a user or group already exists
Dont directly check with /etc/passwd, or /etc/group for existence of a user or group. This wont look up NIS database entries. A better way is to use getent, part of glibc.
Lookup database entry for an existing user:
Identifying Linux distributor and version
The Linux Standard Base makes it really easy to identify the Linux distributor and version for LSB compliant. If the lsb package is installed (redhat-lsb, lsb, asianux-lsb, ...), just run:
lsb_release -i -dor
lsb_release -a
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