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Linux

Checklist

Check your Linux educational progress with the following list:

  • Basic commands

    • pwd
    • ls
      • How to list hidden files?
      • How to list content using long list format?
    • cd
      • What 'cd ..' means?
      • What will happen when running 'cd -'?
    • touch
    • rm
      • how to remove a directory?

  • File system hierarchy

    • What is '/'?
    • What is stored in '/bin'?
    • What '/home' is usually used for?
    • What can you find in '/var'?

  • I/O redirection

  • Network

    • netstat

  • Users

    • commands
      • useradd
      • usermod
      • who
    • how to add a new user?
    • should you be using your user or root?

  • Monitoring and performence commands

    • top
    • stat

  • Processes

    • Running in ackground (&)

  • Archives

    • what is it good for
    • tar
    • zip
    • commands
      • create an archive
      • list archive's content
      • remove an archive

  • Storage, Filesystem

    • inode
    • [ ]

Books

Author Title Comments
William Shotts The Linux Command Line Free
Christopher Negus Linux Bible

Videos

Presenter Video Length Level
Joseph Delgadillo The Complete Linux Course: Beginner to Power User! 07:23:52 Beginner

Interview Questions

  • What is the different between a soft link and hard link?
hard link is the same file, using the same inode.
soft link is a shortcut to another file, using a different inode.

soft links can be created between different file systems while
hard link can be created only within the same file system.
  • How to run a process in background and why to do that in the first place?
You can achieve that by specifying & at end of the command.
As to Why? since some commands/processes can take a lot of time to finish
execution or run forever
  • What signal is used when you run 'kill '?
The default signal is SIGTERM (15). This signal kills
process gracefully which means it allows it to save current
state configuration.
followup questions:
what is SIGKILL?
what other signals there are?