git -ls-remote

Posted on May 8, 2012 by alex

$ git ls-remote From ssh://user@ip/dir somehash HEAD somehash refs/heads/master

Setting Up Glassfish3 Application Server

Posted on January 26, 2012 by alex

Continue from Install Glassfish3 JEE Application Server

```
glassfish@server:~$ cd /home/glassfish
```

Create a domain:

glassfish@server:~$ glassfish3/bin/asadmin create-domain release

Done!

Install Glassfish3 JEE Application Server

Posted on January 26, 2012 by alex

On the server:

Add user glassfish
```
root@server:~$ cd /home/glassfish
```

root@server:~$ wget http://download.java.net/glassfish/3.1.1/release/glassfish-3.1.1.zip

root@server:~$ unzip glassfish-3.1.1.zip

Done!

Continue with Setup Glassfish3 JEE Application Server

Prevent git user from logging in via ssh

Posted on January 11, 2012 by alex

Problem:
If you have a git server running, that is hosting projects multiple users are working on, you may want to prevent these users to log in to server via ssh.

They should only be allowed to push and pull things from git repository (ssh) but should have no rights on the server.

Solution:

Change /etc/passwd from something like this:
```
[...]
git:x:1001:1001:,,,:/home/git:/bin/bash
[...]
```
to something like this:
```
[...]
git:x:1001:1001:,,,:/home/git:/usr/bin/git-shell
[...]
```
(assuming git userid is 1001 and git home is /home/git)
Append to /etc/shells:
/usr/bin/git-shell.
It should look something like this:
```
[...]
/usr/bin/screen
/usr/bin/git-shell
[...]
```

“You Ain’t Gonna Need It”

Posted on January 8, 2012 by alex

The more programming experience you gain, the more you will realize how important this principle really is: Wikipedia.org: You Ain’t Gonna Need It. In combination with proper Code Refactoring, your coding will be much faster and straight forward!

Read this book:
Refactoring: Improving the Design of Existing Code

Install Java

Posted on December 14, 2011 by alex

On a server environment, you don’t need the complete jre package. It also includes some desktop-specific packages. What you rather want to install is

*jre-headless:

user@server:~$ sudo apt-get install openjdk-6-jre-headless

handle password by ssh Agent

Posted on December 13, 2011 by alex

user@client:~$ ssh-add path/to/auth/file/user_rsa
Enter passphrase for path/to/auth/file/user_rsa:
Identity added: path/to/auth/file/user_rsa (path/to/auth/file/user_rsa)

ssh connection by RSA, disable password login

Posted on December 13, 2011 by alex

On the client:

user@client:~$ ssh-keygen -t rsa

user@client:~$ ssh-copy-id -i path/to/auth/file/user_rsa.pub user@server

On the server:

user@server:~$ sudo nano /etc/ssh/sshd_config

add/ change following:
RSAAuthentication yes PubkeyAuthentication yes ChallengeResponseAuthentication no PasswordAuthentication no

user@server:~$ sudo service ssh restart

Add user to sudoers

Posted on December 13, 2011 by alex

root@server:~$ visudo

add/ change following:
user ALL=(ALL) ALL

Add user

Posted on December 13, 2011 by alex

root@server:~$ adduser user