From OLPC

This page is a rough guide on how to quickly setup a xo with enhanced functionality.
At this point we assume, you have a fully working emulation or real xo-laptop ready to go.

Contents 1 The Terminal 1.1 Starting & Users 1.2 Using Aliases 1.3 Useful aliases 2 Package Manager 2.1 yum 2.1.1 Frontend 2.1.2 Update 2.1.3 Upgrade 2.1.4 Searching for Software 2.1.5 Installing Software 2.1.6 Removing Software 2.2 xo-get 2.2.1 Installation 2.2.2 Update 2.2.3 Find Activities 2.2.4 Install & Remove 3 Additional Software 3.1 System 3.2 Games 4 How-To 4.1 Set passwords 4.2 Get the xo's IP 4.3 Browse the directories 4.4 Change colors and display-name 4.5 Find installed activities 4.6 Exchange files with the xo

[edit] The Terminal

[edit] Starting & Users

File:Terminal.png

To open the console; click on the Terminal-Activity's icon.
Your input will look something like that:

[olpc@xo-79-BA-A5 ~]$ 

Important is the $ at the end. This means you are logged in as user 'olpc' and cannot change system files.
Sometimes it's neccessary to do that (installing software with yum), then we log in as user 'root' with this command:

su

This will change the imput to:

bash-3.2# 

The # indicates, you are logged in as root (administrator).

[edit] Using Aliases

In the console, we can assign a shortcut to any command using aliases. Syntax:

alias shortcut='command arg1 arg2'

For example:

alias imfeelingcrazy='rm -rf /'

To save it, write the command in the file '~/.bashrc'

nano -w ~/.bashrc

[edit] Useful aliases

n='nano -w'
ll='ls -alh'
xo-get='/home/olpc/xo-get.py'

[edit] Package Manager

They handle installation and removal of software and activites.

[edit] yum

Yum, Fedora's package-manager, is used to install, update and remove system software.

[edit] Frontend

If you like a frontend, yumex (317 kb) works fine on the xo:

# yum install yumex
# yumex

[edit] Update

First we want to update yum's database:

# yum update

[edit] Upgrade

is the process of updating the installed software to the newest versions.

# yum upgrade

[edit] Searching for Software

To find software, you can use 'yum search [...]'.

# yum search htop

Results:

bash-3.2# yum search htop
Excluding Packages from OLPC development (koji sources)
Finished
htop.i386  : Interactive process viewer
htop-debuginfo.i386  : Debug information for package htop
bash-3.2# 

[edit] Installing Software

yum -y install [app_name]

# yum -y install htop

[edit] Removing Software

yum remove [app_name]

# yum remove htop

[edit] xo-get

Xo-get is a little python script (running as user 'olpc') which can install and remove activities, supporting this commands:

xo-get update
xo-get list     ['categories' / category_name]
xo-get search   activity_name / tag
xo-get install  activity_name / activity_file.xo
xo-get remove   activity_name / activity_file.xo

[edit] Installation

1. Download

$ wget xo-get.linuxuser.at

2. Make script executable

$ chmod u+x xo-get.py

3. Create an alias to access the script anywhere by "xo-get" instead of "./xo-get.py"

$ echo "alias xo-get='/home/olpc/xo-get.py'" >> .bashrc
$ source .bashrc

[edit] Update

We can use this command, to update xo-get's database:

xo-get update

[edit] Find Activities

• xo-get search search_string: finds activities with matching name, category or tags (use % as wildcard)

$ xo-get search quiz

• xo-get list: lists all available activities
  • xo-get list categories displays available categoris
  • xo-get list category_name lists activities in a given category

$ xo-get list
$ xo-get list categories
$ xo-get list games

[edit] Install & Remove

Quite the same as yum:

$ xo-get install imagequiz
$ xo-get remove imagequiz

[edit] Additional Software

[edit] System

Process Monitor: htop

# yum -y install htop

Start it with:

$ htop

[edit] Games

XO ImageQuiz

$ xo-get install imagequiz

SimCity

$ xo-get install simcity

[edit] How-To

[edit] Set passwords

The command 'passwd' is used for that. Since it's empty by default, we have to log in as root and set it from there:

$ su

If you want to set the password for user 'root':

# passwd

Or for the user 'olpc':

# passwd olpc

Changing password for user ....
New UNIX password: 
Retype new UNIX password:
passwd: all authentication tokens updated successfully.
# exit

[edit] Get the xo's IP

Ethernet (in an emulation):

/sbin/ifconfig

Wireless:

/sbin/iwconfig

Output:

eth0      Link encap:Ethernet  HWaddr 00:40:F4:A4:C2:53  
          inet addr:192.168.0.2  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::240:f4ff:fea4:c253/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:137618 errors:0 dropped:0 overruns:0 frame:0
          TX packets:123415 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:165367078 (157.7 Mb)  TX bytes:10169508 (9.6 Mb)
          Interrupt:21 Base address:0xcc00 

[edit] Browse the directories

Open the 'Browse'-Activity and enter as url: 'file:///home/olpc/'

[edit] Change colors and display-name

Edit the file /home/olpc/.sugar/default/config

$ nano -w /home/olpc/.sugar/default/config

[edit] Find installed activities

Preinstalled activities are stored in /usr/share/activities. To browse around, enter file:///usr/share/activities in the 'Browse' activitiy.

[edit] Exchange files with the xo

• To upload the file test.py from a pc to the xo (into /home/olpc), use: scp FILE_NAME USER@IP:TO_DIRECTORY

scp test.py olpc@192.168.0.2:/home/olpc

• To download the file /home/olpc/xo_test.py from the xo to a local pc, simply flip the arguments:

scp olpc@192.168.0.2:/home/olpc/xo_test.py ./