1. Linux/Unix - Download Ubuntu Linux :
- Installation of Ubuntu Linux on PCs:
Create bootable USB stick
- Resizing the Windows partition

2. emacs makes extensive us of key combinations:
- what is a buffer, what a window
C-h C-h: help
C-x b: open another buffer
C-x right,left : cycle through buffers
C-x k: kill buffers
C-x 0: close the active window
C-x 1: close all windows except the active window
C-x 2: split the active window vertically into two horizontal windows
C-x 3: split the active window horizontally into two vertical windows
C-x o: change active window to next window
C-x C-f: open a file
C-x C-w: save a file under a given name
C-x C-s: save a given file

3. emacs C-_: undo C-s: search forward C-r: search backwards
C-space: mark region
C-k: kill a line
C-w: kill a region
M-%: replace text

4. UNIX/Linux

5. ✗ ✔ filetree File System Navigation
Important system directories (common places)
/bin - binaries of commands
/sbin - binaries of system admin commands
/usr - read-only data shared between machines
/usr/bin - shared binaries
/usr/sbin - shared system admin commands
/usr/local/bin - shared binaries installed locally
/usr/local/sbin - shared system admin binaries installed locally
/dev - files corresponding to devices
/etc - host specific configuration files
/home - user accounts
/lib - libraries of objects
/tmp - temporary stuff, deleted periodically
/var - changing data
/proc - information about processes ✗ ✔

6. command cheat sheet File system commands

7. commands
Basic syntax of shell commands UNIX or shell commands have a basic structure
command -options target
command comes first (such as cd or ls)
any options (always proceeded by a – and also called flags)
target (such as the file to move or the directory to list)
These commands are written on the prompt (terminal command line).
Where am I?: pwd
Change directory: cd
what files and directories
are in my current directory: ls
If I need to know more about a command:
man command

8. ls ls ls –a ls –l ls –l –t ls -lS
lists all files and directories in current working directory ls
ls –a
ls –l
ls –l –t
ls -lS
lists all files and directories, including hidden files
long format
time sorted
size sorted