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Top Forums UNIX for Beginners Questions & Answers Why does "ps -[u|U] username" not list processes when username is numeric? Post 303039932 by crimso on Thursday 17th of October 2019 08:34:40 PM
Old 10-17-2019
Hello Corona688,
I have both RHEL6.5 and RHEL7.5 and they behave the same. I've not thought about testing it on our couple Ubuntu servers but the need never comes up. The number that we're using as the login ID are employee numbers affectionately known as WorkDay ID's assigned by the AD group. We're using them so the NAS filers play nice with the Linux user when accessing mixed filesystems with permissions controlled by Windows. We were basically forced to since the storage group didn't want to maintain a Linux user name to WorkDay ID map. As for the UID I'm simply incrementing to the next available number. It never dawned on me when this took place that ps would interpret the numeric login ID as the UID. I have to assume that's what's happening. I may end up having to create an alias much like the code you suggested.
 

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listusers(1)						      General Commands Manual						      listusers(1)

NAME
listusers - display user login data SYNOPSIS
groups] logins] DESCRIPTION
The command displays data concerning user logins. The output shows the user login and the comment field value (for example, user name, location). The default displays data about all user logins. Options The command supports the following options: Display only users who have groups, as their primary group. Use with the option. Display only users who have groups, as their supplementary group. Use with the option. Display all users belonging to groups, sorted by login. A comma separated list specifies multiple groups. Display the requested logins. A comma separated list specifies multiple logins. Display only users belonging to the specified repository, either for NIS or users. A user login has a UID of 100 or greater. When the and options are combined, a user login is only displayed once, even though the login may belong to multiple specified groups. EXAMPLES
List all user logins. List all user logins in the group and the users removing all duplicates. List all users who have as their primary group. List all users who have as their supplementary group. List only local user logins. List only NIS user logins. FILES
SEE ALSO
passwd(1), logins(1M), group(4), passwd(4). STANDARDS CONFORMANCE
listusers(1)
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