# 9.8.26 notes

**9.8.26**

**You should be comfortable with everything [here](https://elab.hpa.edu/wiki/pages/a2L718H/Module_21_Files_and_navigation.html)**

- MC/FR quiz: exam in a box
- scp python code: laptop to pi 
    - scp <filename> user@<ipaddress>:/<location>
- mv, cp, rm, cat, less, more 
    - mv is move, also change name
    - cp is copy, from one place to another
    - rm is remove, rm -frd removes directories too
    - cat, less and more look inside files
- useradd
- su root
- sudo nano /etc/interfaces
- man pages
- $ vs # prompt
- powershell=windows shell
- uname -h for help
- apropos usb = keyword search
- apt install<span class="Apple-converted-space"> (see below)</span>
- dpkg -i<span class="Apple-converted-space"> </span>

**wget: installing stuff**

- wget [http://ftp.us.debian.org/debian/pool/main/c/cmatrix/cmatrix\_2.0-6+b1\_arm64.deb](http://ftp.us.debian.org/debian/pool/main/c/cmatrix/cmatrix_2.0-6+b1_arm64.deb)
- ls -lh \*.deb
- dpkg-deb --info cmatrix\_\*.deb
- sudo dpkg -i cmatrix\_\*.deb
- cmatrix

**using apt:**

- sudo apt update
- sudo apt install sl
- sl<span class="Apple-converted-space"> </span>

**What's the difference?**

- wget <span class="Apple-converted-space"> </span>→ download something from the Internet
- .deb <span class="Apple-converted-space"> </span>→ Debian software package
- dpkg -i<span class="Apple-converted-space"> </span>→ install a local package
- cmatrix<span class="Apple-converted-space"> </span>→ run what we installed
- dpkg -L<span class="Apple-converted-space"> </span>→ see what files were installed

next:[ network structure review](https://elab.hpa.edu/wiki/pages/q0G0N1s/Module_31_Routers_and_firewalls.html)