Mixing
Can a user also be a group itself?
Clash Royale CLAN TAG#URR8PPP
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down vote
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In my Ubuntu 16.04 terminal, logged in as "john" (a normal user), I enter:
john@ubuntu-server:~$ groups john
Then the output goes:
john: john adm ......
So I wonder how john can be a user and a group at the same time. I really don't get it and I cannot find a satisfactory explanation on the Internet. Please enlighten me, thanks.
command-line users groups
edited 51 mins ago
Ravexina
30.1k1474103
asked 1 hour ago
Franky Hung
183
New contributor
Franky Hung is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |Â
up vote
3
down vote
favorite
In my Ubuntu 16.04 terminal, logged in as "john" (a normal user), I enter:
john@ubuntu-server:~$ groups john
Then the output goes:
john: john adm ......
So I wonder how john can be a user and a group at the same time. I really don't get it and I cannot find a satisfactory explanation on the Internet. Please enlighten me, thanks.
command-line users groups
edited 51 mins ago
Ravexina
30.1k1474103
asked 1 hour ago
Franky Hung
183
New contributor
Franky Hung is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Background: UserPrivateGroups: How it Works
– steeldriver
51 mins ago
add a comment |Â
up vote
3
down vote
favorite
up vote
3
down vote
favorite
In my Ubuntu 16.04 terminal, logged in as "john" (a normal user), I enter:
john@ubuntu-server:~$ groups john
Then the output goes:
john: john adm ......
So I wonder how john can be a user and a group at the same time. I really don't get it and I cannot find a satisfactory explanation on the Internet. Please enlighten me, thanks.
command-line users groups
edited 51 mins ago
Ravexina
30.1k1474103
asked 1 hour ago
Franky Hung
183
New contributor
Franky Hung is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
In my Ubuntu 16.04 terminal, logged in as "john" (a normal user), I enter:
john@ubuntu-server:~$ groups john
Then the output goes:
john: john adm ......
So I wonder how john can be a user and a group at the same time. I really don't get it and I cannot find a satisfactory explanation on the Internet. Please enlighten me, thanks.
command-line users groups
command-line users groups
edited 51 mins ago
Ravexina
30.1k1474103
asked 1 hour ago
Franky Hung
183
New contributor
Franky Hung is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 51 mins ago
Ravexina
30.1k1474103
asked 1 hour ago
Franky Hung
183
New contributor
Franky Hung is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 51 mins ago
Ravexina
30.1k1474103
edited 51 mins ago
Ravexina
30.1k1474103
edited 51 mins ago
Ravexina
30.1k1474103
30.1k1474103
asked 1 hour ago
Franky Hung
183
New contributor
Franky Hung is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
Franky Hung
183
asked 1 hour ago
Franky Hung
183
183
New contributor
Franky Hung is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Franky Hung is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Franky Hung is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Background: UserPrivateGroups: How it Works
– steeldriver
51 mins ago
add a comment |Â
Background: UserPrivateGroups: How it Works
– steeldriver
51 mins ago
Background: UserPrivateGroups: How it Works
– steeldriver
51 mins ago
Background: UserPrivateGroups: How it Works
– steeldriver
51 mins ago
add a comment |Â
1 Answer
1
active
oldest
votes
up vote
6
down vote
accepted
When you create a user, a group will be created with the same name and will be set as newly created user's primary group.
You can find out what your primary group name is using:
id -gn
The file which defines which group is your primary group lives at: /etc/passwd, run bellow command to get corresponding line to your user:
getent passwd $USER
it should look like:
username:x:1000:1000:Your Name,,,:/home/username:/bin/bash
Pay attention to second (1000), it's your primary user's group id.
or find out what groups your user is a member of using:
id -Gn
The file contains details about groups lives at: /etc/group, this command should show you the details about your user's primary group:
grep "^$USER" /etc/group
Same as:
getent group $USER
The result looks like:
groupname:x:1000:
Remember the 1000 from before? this is the group id which has been set as your primary group in /etc/passwd.
Then when you create new files, they would be owned by your user, and your primary group (which is same as your username and only one user is a member of that group, which is your user).
answered 58 mins ago
Ravexina
30.1k1474103
very clearly explained, thx!
– Franky Hung
54 mins ago
@FrankyHung You are welcome, You can accept my answer by clicking on the gray tick if you think it was helpful to you.
– Ravexina
52 mins ago
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
6
down vote
accepted
When you create a user, a group will be created with the same name and will be set as newly created user's primary group.
You can find out what your primary group name is using:
id -gn
The file which defines which group is your primary group lives at: /etc/passwd, run bellow command to get corresponding line to your user:
getent passwd $USER
it should look like:
username:x:1000:1000:Your Name,,,:/home/username:/bin/bash
Pay attention to second (1000), it's your primary user's group id.
or find out what groups your user is a member of using:
id -Gn
The file contains details about groups lives at: /etc/group, this command should show you the details about your user's primary group:
grep "^$USER" /etc/group
Same as:
getent group $USER
The result looks like:
groupname:x:1000:
Remember the 1000 from before? this is the group id which has been set as your primary group in /etc/passwd.
Then when you create new files, they would be owned by your user, and your primary group (which is same as your username and only one user is a member of that group, which is your user).
answered 58 mins ago
Ravexina
30.1k1474103
very clearly explained, thx!
– Franky Hung
54 mins ago
@FrankyHung You are welcome, You can accept my answer by clicking on the gray tick if you think it was helpful to you.
– Ravexina
52 mins ago
add a comment |Â
up vote
6
down vote
accepted
When you create a user, a group will be created with the same name and will be set as newly created user's primary group.
You can find out what your primary group name is using:
id -gn
The file which defines which group is your primary group lives at: /etc/passwd, run bellow command to get corresponding line to your user:
getent passwd $USER
it should look like:
username:x:1000:1000:Your Name,,,:/home/username:/bin/bash
Pay attention to second (1000), it's your primary user's group id.
or find out what groups your user is a member of using:
id -Gn
The file contains details about groups lives at: /etc/group, this command should show you the details about your user's primary group:
grep "^$USER" /etc/group
Same as:
getent group $USER
The result looks like:
groupname:x:1000:
Remember the 1000 from before? this is the group id which has been set as your primary group in /etc/passwd.
Then when you create new files, they would be owned by your user, and your primary group (which is same as your username and only one user is a member of that group, which is your user).
answered 58 mins ago
Ravexina
30.1k1474103
very clearly explained, thx!
– Franky Hung
54 mins ago
@FrankyHung You are welcome, You can accept my answer by clicking on the gray tick if you think it was helpful to you.
– Ravexina
52 mins ago
add a comment |Â
up vote
6
down vote
accepted
up vote
6
down vote
accepted
When you create a user, a group will be created with the same name and will be set as newly created user's primary group.
You can find out what your primary group name is using:
id -gn
The file which defines which group is your primary group lives at: /etc/passwd, run bellow command to get corresponding line to your user:
getent passwd $USER
it should look like:
username:x:1000:1000:Your Name,,,:/home/username:/bin/bash
Pay attention to second (1000), it's your primary user's group id.
or find out what groups your user is a member of using:
id -Gn
The file contains details about groups lives at: /etc/group, this command should show you the details about your user's primary group:
grep "^$USER" /etc/group
Same as:
getent group $USER
The result looks like:
groupname:x:1000:
Remember the 1000 from before? this is the group id which has been set as your primary group in /etc/passwd.
Then when you create new files, they would be owned by your user, and your primary group (which is same as your username and only one user is a member of that group, which is your user).
answered 58 mins ago
Ravexina
30.1k1474103
When you create a user, a group will be created with the same name and will be set as newly created user's primary group.
You can find out what your primary group name is using:
id -gn
The file which defines which group is your primary group lives at: /etc/passwd, run bellow command to get corresponding line to your user:
getent passwd $USER
it should look like:
username:x:1000:1000:Your Name,,,:/home/username:/bin/bash
Pay attention to second (1000), it's your primary user's group id.
or find out what groups your user is a member of using:
id -Gn
The file contains details about groups lives at: /etc/group, this command should show you the details about your user's primary group:
grep "^$USER" /etc/group
Same as:
getent group $USER
The result looks like:
groupname:x:1000:
Remember the 1000 from before? this is the group id which has been set as your primary group in /etc/passwd.
Then when you create new files, they would be owned by your user, and your primary group (which is same as your username and only one user is a member of that group, which is your user).
answered 58 mins ago
Ravexina
30.1k1474103
edited 53 mins ago
answered 58 mins ago
Ravexina
30.1k1474103
answered 58 mins ago
Ravexina
30.1k1474103
answered 58 mins ago
Ravexina
30.1k1474103
30.1k1474103
very clearly explained, thx!
– Franky Hung
54 mins ago
@FrankyHung You are welcome, You can accept my answer by clicking on the gray tick if you think it was helpful to you.
– Ravexina
52 mins ago
add a comment |Â
very clearly explained, thx!
– Franky Hung
54 mins ago
@FrankyHung You are welcome, You can accept my answer by clicking on the gray tick if you think it was helpful to you.
– Ravexina
52 mins ago
very clearly explained, thx!
– Franky Hung
54 mins ago
very clearly explained, thx!
– Franky Hung
54 mins ago
@FrankyHung You are welcome, You can accept my answer by clicking on the gray tick if you think it was helpful to you.
– Ravexina
52 mins ago
@FrankyHung You are welcome, You can accept my answer by clicking on the gray tick if you think it was helpful to you.
– Ravexina
52 mins ago
add a comment |Â
Franky Hung is a new contributor. Be nice, and check out our Code of Conduct.
Franky Hung is a new contributor. Be nice, and check out our Code of Conduct.
Franky Hung is a new contributor. Be nice, and check out our Code of Conduct.
Franky Hung is a new contributor. Be nice, and check out our Code of Conduct.
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Background: UserPrivateGroups: How it Works
– steeldriver
51 mins ago