Linux FoundationsConcept Card Index
Use concept cards when you need the idea behind a command. Commands prove one action; concepts explain why the action works.
S01 Orientation
- Linux
- Unix
- filesystem
- path
- file
- directory
- I/O
- server
- client
- SSH login
- IRC
- terminal
- shell
- readline
- shell basics
- filesystem navigation
- reading files
- manual pages
- first site build
- kernel
- userspace
- syscall
- CPU
- memory
- time zones
S02 Files And Identity
S03 Streams And Processes
- pipes
- text search
- regular expressions
- stream redirection
- file descriptors
- devices
- dev null
- terminal multiplexing
- process
- process basics
- signal
- job control
- filesystem as CMS
S04 Permissions And Git
- permissions
- package discovery
- package management
- git basics
- Forgejo publishing
- multi-user filesystems
- number bases
S05 Scripting
- shell scripting
- shebang
- script permissions
- variables
- environment variables
- quoting
- script arguments
- standard input
S06 Control Flow And Networking
- control flow
- conditionals
- loops
- one-liners
- network diagnostics
- DNS
- IP networking
- IP addressing basics
- sockets
- ICMP
- HTTP basics
- HTTP
- SMTP basics
- external data fetching