Guidance for MPI test machine

How to connect the trial machine

   ssh -l your_team_account gro.cc.titech.ac.jp

Your initial passwd will be obsolute within two days if you do not change the passwd after you receive it.

Operating System:Unix

1. File System

The Unix file system is almost the same as the Windows. Folder is called directory. Each directory or file are accessed with absolute path or relative path:

   (specified with absolute path)
   /             root directory
  /home/usr1/    
  (specified with relative path)
  ./             current directory
  ../bin/        go up one directory, then go down to bin directory
  ../program/a.c 

2. File Properties


• directory or file
• read(r)/write(w)/execution(x) permissions to {owner, group, other}
• name/id of the file owener
• file size
• file time stamp
• file name

example:


3. Regular Expressions

File names can be shorcutted.

  *.c         matches all files having ".c" extension
  program.*   matches all files having "program" name
  ABC*        matches all files having "ABC" heading
  *10*.c      matches all files having "10" in the middle of the file name
              and ".c" extension

Note: upper case letter and lower case letter are distinquished in file names. No blank should not be in file names.

Shell Command

  [command form]
   command_name              ex) ls
   command_name args         ex) ls -l
   command_name file_name(s) ex) cp a.c b.c

  command         description
  -------------------------------------------------
  exit            logout(disconnect telnet)

  passwd          change passwd
  ls              list up all directories/files under the current
  ls -l           list up all directories/files under the current
                  with long information
  ls prog/        list up all files under the directory prog
  ls ../          list up all files uder the father's directory
  ls /usr/etc     list up all files under the /usr/etc/

  cd ../          (change directory) go up one level
  cd prog/        go down one level, to the directory prog
  cd /usr/etc     move to the direcotry /usr/etc

  mkdir xxx       make a directory named xxx
  mkdir prog/a    make a directory named a under the directory prog
  rmdir xxx       remove the directory xxx

  cp file1 file2  copy file1 into file2
  cp -r xxx yyy   copy the directory xxx into yyy recursively

  mv file1 file2  move file1 to file2 (file1 will be renamed to file2)
  mv xxx yyy      the directory xxx will be renamed to yyy

  rm file1        remove file1
  rm F*           remove all files starting 'F'
  rm -r yyy       remove the directory yyy recursively

  less file.c     show the file.c (scroll down with SPACE key, quit with Q)

  !!              execute the previous command
  !c              execute the previous command beginning with 'c'

  mule -nw        invoke the editor mule without window

  man man         show up the online manual 'man'
  
  cc f.c -lmpi    compile a C program 'f.c' with the MPI library 'mpi'
                  default execution file name is 'a.out'
  mpirun -np 4 ./a.out  run 'a.out' with four cpus

File Transfer

1. in the Unix, type the following command

      cat > file.c
   

   , then paste the text which you want to transfer and type Ctrl D(EOF). The pasted text will be stored in the file.c.
2. Invoke the editor mule, then paste the text on the buffer.
3. If you have the command scp (secure copy), use it.

Editor

Key abbreviation:

   C-x    type Cntorl key and X key
   M-x    type ESC key then type X key

Command List
   C-x C-c  quit the editor
   
   C-x C-f  open a file and load into the current buffer

   C-x C-s  save the current buffer into the corresponding file

   C-x k    delete the current buffer
   C-x 2    split the current buffer into two
   C-x 1    repair splitted buffers into one
   C-x o    go to the next buffer

   C-f      move right one cursor
   C-b      move left one cursor
   C-a      move the cursor to the head of the current line
   C-e      move the cursor to the end of the current line
   C-p      move the cursor the previous line
   C-n      move the cursor the next line
   M-<      mvoe the cursor to the begging of the buffer
   M->      move the cursor to the end of the buffer

   C-d      delete one letter to the left
   C-k      delete all letters to the right
   C-w      delete all letters from the marked position to the current
            (*-- to make the mark C-space --*)

   C-y      yank(paste) deleted texts
   
   C-g      quit the current mode

   M-x shel open the shell in a new buffer

MPI Programming