Tagged Questions
3
votes
1answer
88 views
Is there a way to find out how many instances of the root user are logged into a Linux machine?
We have a handful of users that login to our Linux virtual machine as root either through the vSphere client or through SSH and I want to see if there is a way to tell if multiple root users are ...
3
votes
3answers
791 views
Disable user shell for security reasons
We have several user accounts that we create for automated tasks that require fine-grained permissions, such as file transfer across systems, monitoring, etc.
How do we lock down these user accounts ...
5
votes
2answers
212 views
How to disable login for an user?
My Linux has many not-human users like cron, ntp, daemon, http, etc. I want to disable anybody to login as any of this users. Real people on my machine are root and me, so only root and me should be ...
4
votes
1answer
187 views
Force pubkey-auth user to set password at first login
When I create a new user account I ask users to send me a public key, and want to force users to set the password the first time they log in with keypair authentication. If I create an account with an ...
0
votes
3answers
117 views
User's name appears as “bash-3.0” on SSH shell
I am working on a Redhat server and one of the users' names appears as "bash-3.0" on the "SSH Secure Shell Client."
His name is appearing correct under /etc/passwd. How could this happen?
How can I ...
3
votes
1answer
653 views
SSH not landing in the home directory
I have recently installed Raspbian into a Raspberry Pi. As part of the installation process I changed the user name and group from the default (pi) to my own (let's call it user) using usermod and ...
2
votes
2answers
536 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?
4
votes
1answer
188 views
Is it safe to use /bin/cat as shell for a restricted user?
I need to remontely log on to few peoples machines to do maintanance tasks, but sometimes the machines can be behind firewalls or NAT's.
The way I have been doing it is to give the user advice on how ...
7
votes
3answers
420 views
Prevent a unix account from being able to SSH [duplicate]
Possible Duplicate:
Disable direct login for normal users (like oracle) in linux but allow scp and sftp?
I want to prevent a unix account from being able to be SSH'ed with, but it should ...
1
vote
1answer
867 views
How to create an user only with SSH -access and easily-set-up .ssh -dir perms?
I often mess up when I manually set up the .ssh -dir, easy to forget some flag. I often need to create a new user and only allowing access with SSH, how can I do that? Basically, I want to stop doing ...
3
votes
4answers
5k views
Can a linux user change their password without knowing the current password?
I'm setting up a few ubuntu boxes, and using opscode's chef as a configuration tool. It would be fairly easy to install public keys for each user on each of these servers, and disable password ...
8
votes
3answers
6k views
Which users are allowed to log in via SSH by default?
When I set up my Debian 6, I was wondering, which users apart from root whose password I know can log into my system via SSH?
When I install Apache 2 a user called www-data gets created. Does this ...
2
votes
1answer
179 views
Why am I not able to login directly using SSH
Suppose, the server address is abcd.com.
On my local machine at my workplace, I have to login to that server, using
ssh <my employeeid>@abcd.com
Then, to login to user myname , I have to use
...
2
votes
1answer
436 views
Deny external SSH access to a user
Is it possible to deny access to a user (in my case www-data) from outside the network? Or possibly deny this:
ssh www-data@example.com
But allow this if already logged in:
su www-data
3
votes
1answer
760 views
User logged in by sftp does not show up in `w`
My server is Centos 5. I have a chroot environment set up with the following in my sshd_config
Match group sftponly
ForceCommand internal-sftp
ChrootDirectory %h
AllowTcpForwarding no
...
2
votes
1answer
114 views
Suddenly changing users [closed]
Has anyone ever encountered a scenario where you are logged into a system going about your standard business, cat, ls, tail, grep, vim, find etc. and suddenly permissions to regular things stop ...
4
votes
2answers
10k views
How to add a ssh user who only has permissions to access specific folder?
How to add an ssh user who only has permissions to access specific folder?
useradd -d /var/www/xyz.com.tr/musteri -s /bin/bash -g sshd musteri
I created a user called musteri. I set its home ...
1
vote
1answer
1k views
How do I log out of all my active sessions?
For some reason, I have a few open sessions on an SSH server that I don't know about. I assume they're leftovers from when my pipe broke.
$ users
user1 user2 user3 me me me me
Is there a way to log ...
2
votes
2answers
596 views
SFTP with Mysql user pass instead of PAM
Is there a way for people to log onto a debian server via sftp using just mysql database table as authentaction. IE not adding a user to the system?
I know it can be done over ftp and TLS but i ...
2
votes
4answers
288 views
different shell for root and non-root user
When I ssh as root, my shell is bash, but when it's a non-root user it is sh. How can I make them both to use bash?
This actually goes against the logic in this question: Why root's default shell is ...
3
votes
3answers
2k views
How to find the machine from which a user logged into current machine using ssh?
In a multi server architecture, is it possible to find out from which machine a user logged into current machine using ssh?
For example, user1 logged into host1. From there, the user logged into ...
8
votes
2answers
3k views
How can I determine if someone's SSH key contains an empty passphrase?
Some of my Linux & FreeBSD systems have dozens of users. Staff will use these "ssh gateway" nodes to SSH into other internal servers.
We're concerned that some of these people use an unencrypted ...
