Tagged Questions
0
votes
1answer
78 views
Allow all group members to create directories and files
There are 2 users
sftp_user
apache
Both users belong to the updaters group as well as other groups.
New directories and files are created in the
/updates/ directory.
drwxrwsr-x 8 sftp updaters ...
1
vote
1answer
36 views
Securely running LAMP under a specific user
I'm setting up a sandbox type of server that will be used by a couple users as a development environment and knowledge base. The server will have a web frontend so I've installed Apache, MySQL and ...
1
vote
1answer
235 views
Trouble adding existing user to existing group in ubuntu
I was trying to add a user called bill to www group
useradd -G www bill
It gives me error
UX: useradd: ERROR: bill is already in use. Choose another.
I checked if this user already in the group ...
2
votes
1answer
109 views
Delete every users from a group
I search a clean way to delete every users from the 'sudo' group. On several distributions the user created during the installation process has sudo rights, I don't want this. I search for an ...
0
votes
2answers
77 views
Change/Create permissions for a folder
How can I create (if the folder is new) or change (if the folder was already existent) permissions for a folder?
In particular, I want to create a subdirectory in /etc/bind/ where I can put the ...
4
votes
2answers
321 views
Why don't /etc/group and /etc/password match?
OK this is a basic question showing my ignorance of sysadmin matters...
Looking at the UNIX system I work on, my /etc/passwd entry says
my_name:x:uid:gid:comments:home directory:login shell
Then ...
3
votes
1answer
512 views
Group within group file permissions
I tried finding this on here, but couldn't so sorry if it's a duplicate.
Say I have 2 groups and a user: group1, group2, user1
with the following structure: group1 is a member of group 2, user1 is a ...
7
votes
1answer
623 views
In /etc/group what is the meaning of the second field?
A sample /etc/group file contains the following entries:
root:*:0:
adm:!:4:logcheck
antoine:x:1000:
The man pages I've read (Debian & OSX) says the second field is to store a group password. ...
2
votes
2answers
541 views
Limited SSH user on Ubuntu 12
I'm running Minecraft on a server. How can I give my friend SSH access just to the minecraft folder (a root folder), the screen command, and some ports?
1
vote
5answers
1k views
What is the command for listing all users who are members of the admin group?
I am looking for the name of the superusers list on Fedora. (On Ubuntu is seems to be "sudo".) I want to add one of the users to the superusers list.
The groups command only lists the groups of the ...
0
votes
1answer
163 views
Incompatible group permissions in Linux - Is it a bug? [duplicate]
Possible Duplicate:
How to apply changes of newly added user groups without needing to reboot?
I am on Ubuntu 11.04. I am creating another user and placing an existing user in the group of ...
1
vote
0answers
227 views
Adding a second user to a system group? [closed]
I am trying to get around a permission issue I am having. The only reasonable option (other than ACL) is to add the user that needs access to the system group of the user that has access. Yes, the ...
22
votes
3answers
23k views
How do I remove a user from a group?
Which command should I use to remove a user from a group in Debian?
When adding a user to a group, it can be done with:
usermod -a -G group user
However, I could not find a similar command ...
5
votes
5answers
359 views
Why is it recommended to create a group and user for some applications?
Most of the time, when installing a program from source it is recommended to create a new user and a new group and give /usr/local/<myapp> the recently created user and group ownership.
Why is ...
8
votes
2answers
12k views
How can I change a user's default group in Linux?
Being new to Linux administration, I'm a little confused about the following commands:
useradd
usermod
groupadd
groupmod
I've just finished reading the user administration book in the Linux/Unix ...
2
votes
1answer
3k views
Changing user and group ID system wide (including file system attributes)?
(this question possibly related to Linux: simulating/masking user ownership upon mount of 'external' partitions? - Stack Overflow)
I typically use Ubuntu (currently 11.04) as my desktop OS; let's say ...
2
votes
2answers
436 views
su user fails with “grep: /var/cpanel/users/user: Permission denied”
I just did something pretty simple. Given a user user, I modified his user id, primary group's id, and added him to a new group in order to make my server use the same uid and gid as another server ...
2
votes
3answers
150 views
Group information reported wrong for a specific user
I have a problem on a server I manage. An account (specifically, my account) does not seem to have the correct groups. I think the problem is most easily demonstrated by looking at the following ...
8
votes
2answers
2k views
How to apply changes of newly added user groups without needing to reboot?
Assume I'm logged in with user takpar:
takpar@skyspace:/$
As root, I've added takpar as a member of group webdev using:
# usermod -a -G webdev takpar
But it seems it has not been applied. because ...
6
votes
2answers
3k views
GID, current, primary, supplementary, effective and real group IDs?
The following links discuss these concepts in different contexts. I have read their definitions, but I still can't tell how they are related, or if some of them are just the same.
Current group ID
...
4
votes
1answer
307 views
Why do I need to use newgrp or su (or logout and login again) to have new group memberships applied?
What is it that makes new group membership require a new login (or new login shell as started by su or newgrp) to be visible?
Just running another bash (or whatever other shell) instance with --login ...
5
votes
2answers
2k views
What are the allowed group names for groupadd?
I followed these instructions to build Shadow, which provides the groupadd command. I am now getting an error when trying this:
$ groupadd automake1.10
groupadd: 'automake1.10' is not a valid group ...
2
votes
3answers
1k views
How to configure permissions to allow file access?
I'm running Wowza Media Server on my server as "root". The problem is that all files created (recorded) by Wowza are "root:root" and aren't writable, editable, or deletable by any other users. How can ...
2
votes
3answers
2k views
Reset all groups to default
I recently set up some groups and users on my machine, and now I want to remove all those users and all those groups. Somewhat stupidly, I read on an Ubuntu forum or something like that that it was ...
4
votes
2answers
3k views
Add all users in one group to another group?
I have some users in a group called aa and I need to give them the rights to write to a folder which is currently tomcat:tomcatdeploy.
The straightforward way to do this is to add all the users to ...
1
vote
3answers
162 views
How to make files created by a specific user to have specific permissions by default
Here's a sequence of commands and the resulting output:
$ touch testfile
$ stat -c'%a %A' testfile
644 -rw-r--r--
What must I do so that when a user follows that sequence, I get this output ...
6
votes
1answer
4k views
