A chess program would be a nice addition. Here I’ll show you how to install GNU chess and xboard.

1. First download the following packages :
   • the debian etch gnuchess package
   • the debian etch xaw3dg package
   • the debian etch xboard package

   You’ll need to download the i386 architecture package.

2. Next, open the file manager. Right click on the gnuchess package and select ‘Install DEB file…’ . After a while a message will be shown saying it was successfully installed.
3. Do the same for the xaw3dg package
4. And the same for the xboard package
5. While still in the file manager, click ctrl+T (control t). This opens the console. In there type xboard
6. A chessboard should now appear :
   
   
   

  error_mess="This environment variable should be set"
 
  : ${ORACLE_HOME:?$error_mess}

The output looks like this :

  ./script.sh[3]: ORACLE_HOME: This environment variable should be set

The script exits after checking ORACLE_HOME, none of the following commands get executed.

I found this in the sample chapter of the The Korn Shell: Unix & Linux Programming Manual, 3rd Edition book.

  ftp -v -n hostname << EOF
  user usuario password
  bin
  put filename
  bye
  EOF

With thanks to this post.

  echo "HP Unix version      : " `uname -a`
  echo "Model                : " `/usr/bin/model`
  echo "Number of processors : " `/usr/sbin/ioscan -kf | grep processor | wc -l`

An example output would be be :

  HP Unix version      :  HP-UX machine B.11.23 U ia64 ident_nr unlimited-user license
  Model                :  ia64 hp server rx4640
  Number of processors :  4

Funnily there doesn’t seem to be a standard command to get the total amount of memory in the machine. HP says here that

  /etc/dmesg | grep -i phys

should work, but I don’t have the privileges to read this on the machines I use.

According to this site, the following C code can get this :

  #include <sys/param.h>
  #include <sys/pstat.h>
 
  struct pst_static pst; // data that can't change between boots
 
  pstat_getstatic ( &Pst, sizeof ( pst ), (size_t) 1, 0 );
  printf ( "System has %d KB of memory\n",
            pst.physical_memory * pst.page_size );

The machines I work with usually don’t have C installed (I know), so this hasn’t been tested.

   tr -d \\r <$1 >$1.fixed
   mv $1.fixed $1

This run tr on the file, stripping out newline (\r), and saves this in a new file with the postfix .fixed. So install.sh becomes install.sh.fixed. The second line overwrites the original file with this new version.

Then it’s just a matter of calling this for all the files :

   find . -type f -name "*.sh" -exec /path/to/transform.sh {} \;

This finds all the files of type f, which means a normal file. The file also has to have the extension .sh. Then our script transform.sh is called on that file, passing in the filename, specified by {}, as a parameter.

BTW : the way to do this in Perl is :

  perl –pi –e 's/^M//' *

The ^M is entered by pressing Ctrl-V followed by Ctrl-M .

  while read customernr
  do
    <some_script> $customernr
  done < customers.txt

This loops over all the lines in the customers.txt file. This file contains one customer number per line. Then we can reference this customer number as $customernr, and process it. Here that value is given as a parameter to some script.

Thanks to Steve Parker’s website for reminding me of the syntax of the while loop. It’s funny how Google has replaced reading man pages.