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V2012.13

V2012.13. Agenda. Old Business Delete Files New Business Week 10 Topics: Coming up: Yearbook Picture: Feb 7 th @ 12:20PM in Main Gym JVS Open House: Feb 10th 1:30-3:30PM, 15181 OH RT58 . Tours , teachers, and some students will be available Guest Speaker: Feb 12th

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V2012.13

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  1. V2012.13

  2. Agenda • Old Business • Delete Files • New Business • Week 10 Topics: • Coming up: • Yearbook Picture: Feb 7th @ 12:20PM in Main Gym • JVS Open House: Feb10th1:30-3:30PM, 15181 OH RT58. • Tours, teachers, and some students will be available • Guest Speaker: Feb 12th • Hyland Field Trip: Feb 21st • Linux Intro (continued)

  3. Future Meeting Preview GAMING OPERATING SYSTEM NETWORK PERIPHERALS STORAGE CLOUD I/O DATA & DATABASES CPU NETWORK GRAPHICS GRAPHICS APP DEVELOPMENT VIRTUAL MEMORY LANGUAGES

  4. New Business • Intro to Linux • Basic Commands • Install Additional Software • Practice Exercises

  5. Basic Commands • Commands take the following form: <Command> <Switches> <Parameters> <Target> • Switches: single letters, preceded by a hyphen, that adjust what the command does • Parameters: things that the command needs to know in order to work • Target: the thing (such as a file) that the command will be applied

  6. Basic Commands • Let’s look at an example: $ ls -l /home/seighman Target Switch Command This command tells the command line to list, in long format, the contents of the directory “/home/seighman”. The command is “ls”; the switch “-l” tells Linux that you want the list in long format; and the target of this command is the directory “/home/seighman”. In this example, there are no parameters, so that part of the command is just skipped

  7. Basic Commands - man • So, how do I know what switch to use? • manpages are your friend $ man ls LS(1) User Commands LS(1) NAME ls - list directory contents SYNOPSIS ls [OPTION]... [FILE]... DESCRIPTION List information about the FILEs (the current directory by default). Sort entries alphabetically if none of -cftuvSUX nor --sort is specified

  8. Basic Commands • pwd • ls • cd • mkdir • rmdir

  9. Basic Commands 2 • file • touch • cp • rm • mv • rename

  10. Basic Commands 3 • ifconfig • ping

  11. Basic Commands 3 - ifconfig $ ifconfigeth0 • View the network settings on the first Ethernet adapter installed in the computer. $ ifconfig-a • Display info on all network interfaces on server, active or inactive. $ ifconfigeth0 down • If eth0 exists would take it down causing it cannot send or receive any information

  12. Basic Commands 2 - ifconfig $ ifconfigeth0 up • If eth0 exists and in the down state would return it back to the up state allowing to to send and receive information $ ifconfigeth0 192.168.1.102 netmask 255.255.255.0 broadcast 192.168.1.255 • Assign eth0 with the above values for IP, netmask and broadcast address.

  13. Basic Commands 2 - ping $ ping google.com • Ping the host google.com to see if it is alive $ ping google.com -c 1 • Ping the host google.com once

  14. Super User • The “sudo” command introduces the “superuser” or “root user” • The term “root” is the name for the main administrator in a “Unix-like” system, such as Linux • There are many commands that only the root user can run • Depending on the version of Linux you are using, you will either have to log on as the root user or prefix your command with “sudo”. The default Debiandistribution of Linux, for instance, has no root password set. So you will have to use the “sudo” command

  15. Super User • By using “sudo”, you’re saying, “Do the following command as the root user” • When you do this, you will be asked for your password and, if you have the system permissions of a root user (commonly called “being in the admin group”), then the command will be run • If you don’t have root permissions, you will get an error message WARNING: be very careful executing commands as root (sudo), you can easily render your system unuseable!

  16. Installing Software • Installing software on Linux is a broad subject because each version of Linux has its own way of doing things • Most are variations on apt-get (Advanced Packaging Tool), used by Debian, Ubuntu, and related distributions) • yum(Yellowdog Update Manager), used by Fedora and related distributions • The basic syntax is: $ sudo apt-get install <packagename> $ sudo yum install <packagename>

  17. Using apt-get to Manage Software • To install a software package: $ sudo apt-get install <packagename> • To update the local package database: $ sudo apt-get update • To install all available newer versions of packages: $ sudo apt-get upgrade • To remove a package: $ sudo apt-get remove <packagename>

  18. Ubuntu Setup • Install Ubuntu Tweak • Open a ‘terminal’ • Enter the following commands: $ sudoadd-apt-repository ppa:tualatrix/ppa $ sudoapt-get update $ sudoapt-get install ubuntu-tweak • You may need to logout and login again

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