CNSC User Support

The ICI-SC clusters are accessed through a command line interface. Users must be able to navigate using Linux/UNIX commands.

Here are a few basic UNIX commands that are helpful in getting started on the clusters:

• Show pathname of current directory:

  pwd

• List files:

  ls

• Make a directory:

  mkdir directory-name

• Change directory:

  cd directory-name

• Change directory back to home directory:

  cd

• Copy a file:

  cp old-filename new-filename

• View a file (3 options):

  cat filename
  more filename
  less filename

• Edit a file (3 options):

  nano filename
  emacs filename
  vi filename

• Delete a file:

  rm -iv filename

• Delete a directory (recursively¹⁾):

  rm -rf directory-name

• Move a file:

  mv -v old-filename new-filename

• Change permissions:
  • Arguments to chmod command: ugo+-rwx
  • where ugo are user, group and other; rwx are read, write and execute
  • Add execute permission for yourself:

    chmod u+x filename

  • Remove read, write and execute for group and other from a directory and its contents:

    chmod -R go-rwx directory-name

• Man Pages: the man command will give usage information for any UNIX command. Press space bar or enter to page through man page. Type q to quit.

  man ls

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