How do I get a list of users in Ubuntu?

How do I get a list of users in Ubuntu?

Get a List of All Users using the /etc/passwd File

1. User name.
2. Encrypted password ( x means that the password is stored in the /etc/shadow file).
3. User ID number (UID).
4. User’s group ID number (GID).
5. Full name of the user (GECOS).
6. User home directory.
7. Login shell (defaults to /bin/bash ).

Which file contains a list of users and their hashed passwords?

/etc/passwd file
The /etc/passwd file, which contains information about all users, including their encrypted password, is readable by all users, making it possible for any user to get the encrypted password of everyone on the system. Though the passwords are encrypted, password-cracking programs are widely available.

How to get user names from / etc / passwd?

Trawl through /etc/passwd with grep to get user names, and then use id to specify the groups the user belongs to. See the answer by gvalkov for an answer which is likely to be sufficient for sane systems. grep -o ‘^ :]*’ /etc/passwd | xargs -L1 id This gives you names and numbers; tweak the options to id to suit your requirements.

How to get list of all users in a system?

The command we use, insted of “cat /etc/passwd”, is “getent passwd”, which returns the combined list of users from /etc/passwd (local users) and other sources. The getent command will give you a more realistic view of your users, on any system you encounter.

How to list all users in / ETC / Group?

There is no guarantee that the entry for group 23 in /etc/group will list that user. Note that you can have all sorts of weirdnesses turn up in the group file. Multiple names for the same GID. Multiple lines for the same group name with different GID values. GID values listed in /etc/passwd that are not listed in /etc/group.

How to get the user name for a GID?

Name for primary GID. All other group entries that list the user name. It is much simpler if you simply duck and use the id command to do most of the work for you. Trawl through /etc/passwd with grep to get user names, and then use id to specify the groups the user belongs to.