Linux and Shell Programming

author	Matt Harasymczuk
email	book@astronaut.center
www	https://www.astronaut.center
github	https://github.com/astromatt
linkedin	https://linkedin.com/in/mattharasymczuk
facebook	https://facebook.com/matt.harasymczuk
slideshare	https://www.slideshare.net/astrotech/presentations

Tip

• This book is free and open source at https://dev.astrotech.io

• For consulting or training course requests please email book@astronaut.center

Table 3. Other books from author

ISBN	URL	Title
978-83-957186-2-5	https://python.astrotech.io	Python 3: from None to Machine Learning
978-83-957186-3-2	https://dev.astrotech.io	The Software Engineering: DevOps, CI/CD, Docker, Provisioning and Git Flow
978-83-957186-0-1	https://www.astronaut.pl	Astronaut Selection and Training for Long Duration Spaceflight and Extraterrestrial Activity
978-83-956752-0-1	https://www.astronaut.center/books	Space in Practice: How to Prepare and Conduct Stratospheric Balloon Mission
978-83-957186-4-9	https://pl.habitatos.space	HabitatOS - Development of operating system prototype for Lunar and Martian habitats
978-83-957186-1-8	https://alsep.astronaut.center	Geophysics experiments from Apollo Lunar Surface Experiments Package

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Introduction

Introduction

• 1. Agenda
  • 1.1. Agile Bootcamp
• 2. VIM
  • 2.1. Opening files to edit
  • 2.2. Writing files

Linux

Linux

• 1. Directory Structure
• 2. Basic Commands
  • 2.1. cd
  • 2.2. ls
• 3. Environmental Variables
  • 3.1. Environmental Variables
• 4. Crontab
  • 4.1. Przykładowy crontab
  • 4.2. Editing crontab
  • 4.3. Allowing/Denying User-Level Cron
  • 4.4. Files and Directories
  • 4.5. Other
• 5. Logs
  • 5.1. dmesg
  • 5.2. /var/log
  • 5.3. /var/log/syslog
  • 5.4. /var/log/messages
• 6. SSH
  • 6.1. Connecting
  • 6.2. Private Key
  • 6.3. Authorized Keys
  • 6.4. Known Hosts
  • 6.5. Port Forwarding
  • 6.6. Reverse Tunnel
  • 6.7. Config and host aliases
  • 6.8. SSHd
• 7. Users and groups
  • 7.1. Files
  • 7.2. whoami
  • 7.3. UID
  • 7.4. HOME
  • 7.5. useradd vs. adduser
• 8. Permissions
  • 8.1. Understanding Permissions
  • 8.2. Changing Permissions
  • 8.3. UMASK
  • 8.4. Sticky bit
  • 8.5. ACL
• 9. Filesystem
  • 9.1. Symlinks
  • 9.2. File types
  • 9.3. Size
  • 9.4. Disk partitioning
  • 9.5. Checking integrity
  • 9.6. Mounting devices
• 10. Processes
  • 10.1. Spawning - &
  • 10.2. Listing
  • 10.3. PID
  • 10.4. Locks
  • 10.5. Killing
  • 10.6. Priorities
• 11. Signals
• 12. Booting
  • 12.1. LiveCD
  • 12.2. GRUB
  • 12.3. Services and Daemons
• 13. Networking
  • 13.1. Built-in
  • 13.2. Additional
• 14. Devices
• 15. X Window System
  • 15.1. X.org or X11
  • 15.2. startx
  • 15.3. Desktop Manager
  • 15.4. Desktop Environment

Shell Programming

Shell Programming

• 1. Interpreter
  • 1.1. Configuration files
  • 1.2. Locale
  • 1.3. Autocompletion
  • 1.4. New lines
  • 1.5. #!/bin/bash
  • 1.6. bash -x
  • 1.7. Comments
  • 1.8. Inline comments
• 2. Variables
  • 2.1. single quotes
  • 2.2. double quotes
  • 2.3. Script arguments
• 3. Conditionals
  • 3.1. if
  • 3.2. if and else
  • 3.3. Short version - && and ||
  • 3.4. Case (A.K.A. switch)
• 4. Loops
  • 4.1. For
  • 4.2. While
  • 4.3. Until
• 5. Pipe
  • 5.1. Pipe - |
  • 5.2. awk
  • 5.3. sed
  • 5.4. sort
  • 5.5. uniq
• 6. Stdout and Stderr
  • 6.1. > and >>
  • 6.2. < and <<
  • 6.3. 1 > /dev/null
  • 6.4. 2 > &1
• 7. Arrays
  • 7.1. Declaration
  • 7.2. Storing values
  • 7.3. Getting values
  • 7.4. Metadata
  • 7.5. Destruction
• 8. Network
  • 8.1. wget
  • 8.2. curl
• 9. Parameter expansion
  • 9.1. Simple usage
  • 9.2. Indirection
  • 9.3. Case modification
  • 9.4. Variable name expansion
  • 9.5. Substring removal (also for filename manipulation!)
  • 9.6. Search and replace
  • 9.7. String length
  • 9.8. Substring expansion
  • 9.9. Use a default value
  • 9.10. Assign a default value
  • 9.11. Use an alternate value
  • 9.12. Display error if null or unset
• 10. Regular Expressions
  • 10.1. Grep
  • 10.2. Egrep
• 11. Multiprocessing
  • 11.1. Process - ...&
  • 11.2. Subprocess - $(...)
  • 11.3. Return codes from last command $?

References

References

• 1. References
  • 1.1. Bibliography