Linux

1. 1

   The Shell and First Commands

   TerminalShellPromptFirst commandsMan pages
   20 min
2. 2

   Filesystem and Navigation

   Filesystem treeLsCdHidden filesAbsolute vs relative paths
   25 min
3. 3

   Files and Permissions

   TouchCatCpMvRmMkdir+4
   30 min
4. 4

   Text Tools: grep, sed, awk

   GrepSedAwkHeadTailWc+2
   30 min
5. 5

   Pipes and Redirection

   PipesStdoutStderrStdinRedirectionTee
   25 min
6. 6

   Processes and Signals

   PsTopHtopKillSignalsForeground+3
   30 min
7. 7

   Users and Groups

   WhoamiIdSudo/etc/passwdUseraddAdduser+2
   25 min
8. 8

   Package Management

   AptDpkgApt searchApt showDnfPacman
   25 min
9. 9

   Networking Basics

   Ip aIp routePortsSsCurlWget+4
   30 min
10. 10

    Shell Scripting

    ShebangVariablesIfForWhileCommand substitution+2
    35 min
11. 11

    systemd Services

    SystemctlUnit filesEnableStartStopStatus+1
    35 min
12. 12

    SSH and Remote Access

    SshSsh-keygenAuthorized_keysSsh-copy-idScpSsh config
    30 min
13. 13

    Logs and Journals

    /var/logSyslogJournaldJournalctlLog rotation
    25 min
14. 14

    Disks and Storage

    DfDuLsblkPartitionsFilesystemsMount+2
    30 min
15. 15

    Cron and Scheduled Tasks

    CrontabCron fields@daily@reboot/etc/cron.dailySystemd timers
    25 min
16. 16

    Performance and Monitoring

    UptimeLoad averageFreeVmstatIostatHtop+1
    30 min
17. 17

    Capstone: Server Setup

    Sudo userSsh keysNginxSystemd timerBackupsJournalctl
    60 min

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