Contents

• VNC
• dpkg
• tar
• patch
• rsync
• apt-file

VNC

• server
  • start : vncserver
  • stop : vncserver -kill hostname:1
    hostname:1 is an example.
• client
  • vncconnect hostname:1
    hostname:1 is the same name to when you start the server.
• VNC through a firewall.
  • remote# ssh -L dup_port:host_in_firewall:dup_host_port firewall
    
  • remote# vncconnect localhost:dup_port
    

dpkg

• What package is installed?
  • dpkg --get-selections
• Get the installed package status.
  • dpkg --status package-name
  • ex. dpkg --status gcc
• Get the installed package files.
  • dpkg -L package-name
  • ex. dpkg -L gcc

tar

• Copy remote local directories via ssh. (or rsync?)
  • At host0:
  • tar cf - localdir0 | ssh host1 '( cd /dest/dir ; tar xf - )'

patch

How to make a patch file.

• Using diff -u
• When the number of files is one (or a few).
  • Copy the original file as *.orig, here it is a.cc.orig.
  • Update the file a.cc.
  • At the top of the path, type

    diff -u top/of/the/path/a.cc.orig top/of/the/path/a.cc > top_of_the_path_a_20061216.patch
    	  

• When number of file more than one (or many).
  • Copy the original directory to topb.org/, here the original name of the top directory is topb/.
  • Update your change.
  • At the top of the path, type

    diff -ur topb.org topb > topb_20061216.patch
    	  

• Applying the patch: At one up of the top/of/the/path, (The `ls' command shows the directory top/ in the list in this configuration.)

  % ls
  top       patchfile
  % patch -p0 < patchfile
       

rsync

• For rsyncing to USB drive, rsync -rtlv option is recommended on Linux. Since rsync -avr is usual choice, but USB drive usually lacks some flags which other filesystem has.

apt-file

• To find a file, e.g., find missing libs.
  Example: sudo apt-file search libXmu.a find which package has this)