Linux - Module 3: Using Linux
Use a firewall
A default “deny incoming; allow outgoing” policy is very effective
iptables is the built in Linux firewall system
Keep up to date
Your distribution should make it easy to check for, and install, upgrades
Updates have fixes for security problems
Check often, or have your computer do it for you
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Module 3Using LinuxExam Objective1.4 ICT Skills and Working in LinuxObjective SummaryGain desktop skillsIntroduce the command lineLearn about Linux in industry, cloud computing, and virtualizationWorking with the Linux EnvironmentGraphical vs. Non-GraphicalGraphical mode runs an X-server, has windows, and menusNon-graphical mode is text only, focuses on shell accessYou can run multiple shells in graphical mode, each within their own windowGetting to a terminalLook for xterm or terminalPerform a searchLook for a “Utilities” or “System” menuYou can have multiple terminal windows openCut and paste between different applicationsSame shells as non-graphical modeWorking with LinuxLots of software available to get office work done with LinuxLibreOffice provides a word processor, spreadsheet, and presentation package that are compatible with Microsoft applicationsFirefox or Chromium for web browsingDistribution or desktop environment will provide email tools and other apps like a calculator and notepadLinux Security BasicsKeeping SafeCookies are a small token that your browser sends back to the originating site on each requestCookies are the biggest violators of privacyYou can disable cookies entirelyOr just wipe them at the end of the sessionAlso able to disable 3rd party cookiesPasswordsUse strong, unique passwords everywhereSoftware like KeePassX securely save your passwords so you don’t need to remember as manyA strong password is random10 or more charactersMix of UPPERCASE and lowercaseAdd in symbols (#![;Protecting your computerUse a firewallA default “deny incoming; allow outgoing” policy is very effectiveiptables is the built in Linux firewall systemKeep up to dateYour distribution should make it easy to check for, and install, upgradesUpdates have fixes for security problemsCheck often, or have your computer do it for you
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