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This is for users and groups that are defined by /etc/passwd and /etc/group et al as opposed to LDAP-based users.
Group creation
TODO: TBC
For non-system groups:
addgroup <group name>
Each user's primary group must exist before the user is created unless --user-group is specified on the useradd command.
List users in a group
gentent group <group name>
Blue Light user bl
Blue Light's standard Linux system includes user bl.
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For a full Linux user, this example is as used at Saitri Savitri Bhavan on "archiver":
useradd --comment 'Vadivel' --create-home --groups archiver,sb-users vadivel--user-group
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In case the user has a dedicated group with the same name:
delgroup $u
LDAP-based
http://wiki.bluelightav.org/x/QADy
TODO: TBC
Linux groups and users by OpenLDAP
Problem solving
User can't log on
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TODO: check if they have been locked out by speciall stingspecial string(s) in /etc/passwd or shadow (needs research)