Review of Fundamentals

                         1
•   The CST8207 course notes
•   GPL
•   SSH (secure shell)
•   the Course Linux Server

                               2
•   Linux I introduces many fundamental topics
    to give you a good basic foundation
•   In Linux II we build on that same foundation
    so it will be good to refer back to the course
    notes:
http://teaching.idallen.com/cst8207/14f/notes/

                                                     3
•   120_shell_basics.html
•   140_man_page_RTFM.html
•   150_arguments_and_options.html
•   160_pathnames.html
•   170_home_and_HOME.html
•   180_finding_files.html
•   185_find_and_xargs.html
•   190_glob_patterns.html
•   200_redirection.html
•   300_vi_text_editor.html
•   320_shell_variables.html
•   350_startup_files.html
•   400_search_path.html

                                     4
•   440_quotes.html
•   450_file_system.html
•   455_links_and_inodes.html
•   457_disk_usage.html
•   460_symbolic_links.html
•   500_permissions.html
•   510_umask.html
•   520_package_management.html
•   580_system_log_files.html
•   600_processes_and_jobs.html
•   630_crontab_at_job_scheduler.html
•   700_users_and_groups.html
•   720_partitions_and_file_systems.html
•   750_booting_and_grub.html
•   900_unix_command_list.html

                                           5
•   You should be aware that we all use GNU and Linux
    (and other Free software) under license
•   Q: who cares? A: your employer
•   When you receive a copy of GPL software, you are
    automatically granted a license from the copyright
    holder, and you have obligations
•   Roughly, If you don’t give copies to others, no worries
•   Roughly, If you give copies to others
    ◦ 1. You must give the source code along with binary; OR
    ◦ 2. You must provide a written offer to provide source code; OR
    ◦ 3. for other special conditions or possibilities, read the GPL

                                                                       6
•   When you get a job, it will be incredibly important
    that your employer (through your work for them) is
    not found to be out of compliance with the GPL
•   It gets serious when you (on behalf of your
    employer through their facilities) provide copies of
    software to others because you may inadvertently
    deny those others some rights
•   Do not consider this legal advice: when/if the time
    comes, consult your employer’s legal department
•   “We always considered Open Source software to be
    a free-for-all under all circumstances. Why didn’t
    anyone warn us?” -- I just did. That is all this was
    for.

                                                           7
 •   all the details:
     http://teaching.idallen.com/cst8207/14w/notes/070_course_linux_server.html
 •   SSH (secure shell) is a program that allows us to securely invoke a
     shell on a remote computer
 •   On Windows: putty.exe
 •   schematically (abbreviated):
                                                        cst8177.idallen.ca (remote computer)

a terminal window on your
local computer
                                                           password:
                                                           CLS$ exit
 $   ssh user@cst8177.idallen.ca
 $

                                                                                               8
•   what we’d see locally (abbreviated)
       local terminal window

       $ ssh user@cst8177.idallen.ca
       password:
       CLS $ exit
       $

                                          9
•   http://teaching.idallen.com/cst8207/14f/notes/070_course_linux_server.html

•   cst8177-alg.idallen.ca represents an internal IP address that
    works only on campus: when on campus, use this one
•   cst8177.idallen.ca must be used when off campus
•   login id is your algonquin userid
•   password is given verbally by your Prof(s) or another student
•   Change your password at your first opportunity (if you
    haven’t already)
•   If you have firewalled internet access, you might try
    connecting to the CLS on Port 443 with
    ◦ ssh –p 443 cst8177.idallen.ca

                                                                                 10
•   a review exercise based on the material
    from the pre-requisite course.
•   http://teaching.idallen.com/cst8177/15w/
•   Tasks:
    •   read the task
    •   understand the task
    •   what command do you need?
    •   browse/grep the course notes and man pages
    •   complete the task