ubuntu tips

Ubuntu Server Settings

• pppoe: sudo pppoeconf
  
• Network Time Protocol: sudo apt-get install ntp
• How-To: Manage services with "update-rc.d"
  sudo update-rc.d _service_name_ defaults 99
  
• Internet Connection Sharing: dnsmasq(dns+dhcpd) + Firewall(ufw)
  sudo ufw allow 22
  sudo ufw allow 80
  sudo ufw allow from 10.1.1.0/24
  # to enable DHCPD on eth0:
  sudo ufw allow in on eth0 from any port 68 to any port 67 proto udp
  check also "ufw Masquerading"
  
• Firewall (ufw) setting for vsftpd:
  sudo ufw allow ftp
  sudo ufw allow 20/tcp
  
• DynDNS
• gitosis: step to restore git repositories
  
  • restore ssh keys to /etc/ssh
  • restore git directory to /home/git
  • chown -Rf git:git git
    

• grub2 configuration file: /etc/default/grub
• sudo update-grub # to update modified grub2 configuration file
• sudo grub-install /dev/sda # re-install grub to MBA of /dev/sda
• grub2: hold SHIFT to select kernel to boot (GRUB_HIDDEN_TIMEOUT=0)
• Clean Up the New Ubuntu Grub2 Boot Menu
• Change timezone of ubuntu machine from command line: dpkg-reconfigure tzdata
• HP LaserJet setup: hp-setup (hp-setup, hplip-cups)
• Find which Debian or ubuntu Linux Version you are running
cat /etc/issue
• Show the List of Installed Packages on Ubuntu or Debian
  dpkg --get-selections
  dpkg -L
• search for a filename  from  installed  packages.
  dpkg-query -S /etc/bash_completion
  bash-completion: /etc/bash_completion
  

Ubuntu 安裝中文字型

從 vista 安裝標楷體、細明體等字型到 ubuntu ：

sudo mount /dev/sda2 /mnt
sudo mkdir /usr/share/fonts/truetype/ttf-microsoft
cd /mnt/Windows/Fonts
sudo cp mingliu.ttc kaiu.ttf simkai.ttf simfang.ttf \
            simhei.ttf simsunb.ttf simsun.ttc msjh* \
            /usr/share/fonts/truetype/ttf-microsoft/
sudo fc-cache -f -v

sudo apt-get install ttf-mscorefonts-installer

參考文章：
[Ubuntu] 安裝中文字型(文鼎字型、微軟正黑體)
「親愛的」搞定ttf-mscorefonts-installer安裝時出現的錯誤

Install dotProject on CentOS 5

Install required tools

1. sudo yum install mysql-server gd php-gd php-ldap php-mysql
   
2. sudo /sbin/chkconfig --levels 235 mysqld on
3. sudo service mysqld start
   

PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
/usr/bin/mysql_secure_installation

References

Installing dotProject on Centos 5
Installing dotProject
使用 DotProject 架設 Project Server，整合 LDAP
CentOS - Apache server with SSL 的作法

[Ubuntu Netbook Remix] 如何不讓視窗自動放大？

在 Ubuntu Netbook Remix 中開啟的應用程式總是將視窗自動放大，可以用 gconf-editor 來關閉這個功能, 方法如下：

1. 按 "Alt-F2" 鍵，跳出執行程式的輸入視窗
2. 輸入 "gconf-editor" ，再點「執行」
3. 在 "apps->maximux" 中點選 "no_maximize"，以關閉視窗自動放大的功能
4. 完成
5. 參考討論文章
   

Setup Dual Head for EeePC with Ubuntu

1. refer to How to setup Dual Head for Intel Graphics with RandR 1.2
2. edit /etc/X11/xorg.conf for Section "Screen"
   SubSection "Display"
   Depth 32
   Virtual 2048 2048
   EndSubSection
   
3. restart X with "ctrl-alt-backspace"
4. confirm the maximum "Screen 0" size is 2048x2048 with "xrandr -q"
5. set the screen layout
   xrandr --output VGA --pos 0x0
   xrandr --output LVDS --pos 0x1024

EeePC model: 904
Linux distribution: Ubuntu 8.04 LTS

Build EMC2 on CentOS 5.3 (x86_64)

Required packages:

• pth-devel
• bwidget
• tcl-devel
• tk-devel
• libtermcap-devel
  
• readline-devel
• libXmu-devel
• tkinter
  

sudo yum install pth-devel bwidget tcl-devel tk-devel libtermcap-devel readline-devel libXmu-devel tkinter
cd /usr/share/tcl8.4; sudo ln -sf ../../share/bwidget1.8.0 BWidget

edit src/hal/utils/Submakefile

1. locate for ../bin/halrmt
2. remove $(READLINE_LIBS) from its dependent list
3. add $(READLINE_LIBS) to "@$(CXX) $(LDFLAGS) -o $@ $^ -lpthread"

../bin/halrmt: $(call TOOBJS, $(HALRMTSRCS)) ../lib/libemcini.so.0 ../lib/libnml.so.0 ../lib/libemchal.so.0
 $(ECHO) Linking $(notdir $@)
 @$(CXX) $(LDFLAGS) -o $@ $^ -lpthread $(READLINE_LIBS)

cd src
./configure --enable-simulator --enable-run-in-place
make
cd ../; . ./scripts/emc-environment
unset LD_LIBRARY_PATH # to disable incorrect xilinx library search path
emc

Build EMC2 on Windwos

1. GNU PTH Library
2. BWidget:

• download BWidget-*.tar.bz2 from tclib.sf.net
• uncompress and copy it to /usr/share/BWidget
• verify the installation with 'tclsh'
• % set auto_path
• % package require BWidget

Build emc2

1. cd src
2. ./configure --enable-simulator --enable-run-in-place
3. make (stuck at here: cannot build libnml on Windows)
   # Before running the software, set the emc environment:
   # . (top dir)/scripts/emc-environment
   # To run the software type
   # emc
4. libnml is forked from rcslib
5. rcslib can be built with MinGW; cannot be built with cygwin
6. replace libnml with rcslib?
7. port libnml to cygwin?
   
8. skip emc2 and try orocos?