Linux
LI01 - Linux File System
Complexity
Junior
Timeframe
Summary
You should know how to work with the Linux file system.
Skill Breakdown
You should understand what files and directories are.
You should understand the concept of a hierarchical directory structure. You should know what the current working directory and the parent directory are.
You should know how to work with absolute path names and relative path names.
You should basic file commands.
You should understand the concept of symbolic links (hard and soft).
You should know about the filesystem hierarchy standard.
Required Resources
Introduction to Linux:
Optional Resources
There are no optional resources for this skill.
LI02 - Linux Users and Groups
Complexity
Junior
Timeframe
Summary
You should understand how users and groups work in Linux.
Skill Breakdown
You should understand basic user management and be able to:
- add new users using
useradd - update password using
passwd - modify users using
usermod - login as a new user using
su
You should understand the concept of groups. You should be able to perform basic group management and be able to:
- look at groups using
groups - create new groups using
groupadd - add users to groups using
gpasswd - modify groups using
groupmod - delete existing groups using
groupdel
You should understand how permissions work. You should know about read, write and execute access. You should understand that different access permissions can be applied to the owning user, owning group and others.
You should understand how to change permissions using chmod.
Required Resources
Introduction to Linux:
Optional Resources
There are no optional resources for this skill.
LI03 - Linux Processes
Complexity
Junior
Timeframe
Summary
You should understand the basics of Linux processes.
Skill Breakdown
You should understand the concept of a process.
You should understand the concept of parent and children processes.
You should understand PIDs and PPIDs.
You should understand the most important process states:
- running
- sleeping
- stopped
You should understand signals:
- SIGINT
- SIGTERM
- SIGKILL
- SIGHUP
- SIGTSTP
- SIGSTOP
- SIGCONT
You should understand foreground and background processes.
You should be able to use the systemd tool to manage services.
Required Resources
Introduction to Linux:
Optional Resources
There are no optional resources for this skill.
LI04 - Linux Network Fundamentals
Complexity
Junior
Timeframe
Summary
You should understand the basics of Linux networking.
Skill Breakdown
You should understand network interfaces.
You should understand the basics of the IP protocol and know how IP addresses work.
You should understand the basics of the TCP and UDP protocols. You should understand the concepts of sockets and ports.
You should understand the basics of the HTTP protocol and be able to use the curl command to send HTTP requests.
You should understand different HTTP methods, especially GET and POST.
You should understand HTTP headers and HTTP cookies.
You should understand the purpose of HTTPS.
Required Resources
Introduction to Linux:
Optional Resources
There are no optional resources for this skill.
LI05 - Package Management
Complexity
Junior
Timeframe
Summary
You should understand the basics of package management in Linux.
Skill Breakdown
You should understand the purpose of package managers.
You should be able to use apt to manage packages:
- updating with
apt update - upgrading with
apt upgrade - installing packages with
apt install - removing packages with
apt remove - purging packages with
apt purge - searching for packages with
apt searchandapt show
You should know how to manage PPAs.
You should be able to use the dpkg tool.
Required Resources
Introduction to Linux:
Optional Resources
There are no optional resources for this skill.
LI06 - Shell Scripting Basics
Complexity
Junior
Timeframe
Summary
You should understand basics of shell scripting.
Skill Breakdown
You should know how to execute shell scripts. You should understand that there are different shell scripting languages.
You should understand how to declare variables.
You should know how command substitution works.
You should be able to use arithmetic operators.
You should be able to use functions.
You should be able to use loops and conditionals.
You should understand stdin, stdout and stderr.
You should be able to do I/O redirection.
You should know how to use the pipe operator.
You should understand environment variables.
Required Resources
Introduction to Linux:
Optional Resources
There are no optional resources for this skill.