Skip to main content

OpenSSH Public Key Authorization on Linux

To find out whether a user exists or not in a Linux machine:
*    grep username /etc/passwd
or
*    id username

To give a new user access to Linux machine:
1. Login as root user
2. Run this:
    $ /usr/sbin/adduser new_user
3. Set a new password:
    $ passwd new_user
    (and put the password when prompted)

To give them root access:
4. Edit the /etc/sudoers file
    $ vi /etc/sudoers
    User_Alias YOUR_GROUP = new_user
    YOUR_GROUP ALL=(ALL) NOPASSWD: ALL

To test whether the new_user has been granted root access, run these two commands:
    $ su new_user (user should be 'new_user' now)
    $ sudo su (user should be 'root' now)
If the conditions above met, then new_user has root access.

If the new_user want to use public/private key gen authorization:
5. Change your user to be the new_user
    $ su new_user
6. Create ~/.ssh/authorized_keys file if it doesn't exist yet
    $ mkdir ~/.ssh
    $ chmod 700 ~/.ssh
7. Insert the public key on the authorized_keys file
    $ vi ~/.ssh/authorized_keys
    (insert the public key entry)

Comments

Popular posts from this blog

Amigurumi: Single Pea and Deadly Cute Ninja

I think I was bitten by the craft bugs. Here's my next creation: the single pea (because making 3 of them in solid green is just too much for my eyes) and the deadly but cute ninja. Chris called them Peany and Ninji. Peany, Dora, Ninji, and Mushy posing together It's hard to see from this photo, but Ninji actually has a sling (in a slightly different color) around his body, and a mini ninja star. And talk about proportion... the vegetables are larger than the cat and the person. Makes you wonder, isn't it?

Entrepreneurship and Time

Flexo from Consumerism Commentary asked a good question today: Can you be an entrepreneur in your spare time? There are strong arguments for maintaining a relatively secure job while laying the groundwork for your own business. With a stable income, you can fund your endeavors. With benefits from your day job, you don't have to worry about making enough money from your side work to support you if you encounter medical emergencies. On the other hand, there are some reasons why you can't be a successful entrepreneur if all you can devote to the business is your spare time. The more aggressive your goals, the more risk you must be willing to take. Hah! I am averse to risk myself. I like the idea of me being a risk-taker and reap benefits of the challenges I take. But in reality, I like the consistent and the familiars. I guess that's the reason I am not an entrepreneur myself. Flexo then continues to argue that while trying to launch a successful business, don't expect to...