What it is
Computer System
Layered model of systems
Operating Systems
- How many can you list?
- How are they related?
- Who knows all the details?
Ubuntu Linux
- Configuration is done in text files (i.e. /etc)
- Learning an editor is important (I don’t care which one)
- A lot of documentation:
- man
- info
- online
Ubuntu Linux
Where are programs located?
- /bin, /usr/bin, /usr/sbin/, /sbin
Kernel is in /boot
Modules in
/lib/modulesLibraries in
/lib, and/usr/libLOG FILES!!!
Shell review
| Command | - | – |
| ls | ssh | awk |
| cd | ln | grep |
| cp | pwd | mount |
| rm | ps | umount |
| mv | top | sed |
| mkdir | sudo | ssh |
| rmdir | man | scp |
| vi | adduser | wget |
| emacs | deluser | tar |
| chmod | apt | echo |
| find | locate |
A few other items of review
- Tilde (~)
- ., ..,
- *, ?
Path review
- Absolute (/var/www/html)
- Remember always starts with the root (/)
- Relative (./foo, vehicles/cars)
- Never starts with a (/)
- relative to where you currently are
What are we doing this semester?
Last Updated 05/08/2023