Post Install

1. Update Your System

Updating with Octopi

Octopi is a graphical package manager for Arch-based distributions that provides a convenient way to manage packages and updates. To update your system with Octopi, follow these steps:

1. Launch Octopi from the application menu.
2. In the main window, click on the Check updates button (Top left), now next to it System upgrade.
3. Octopi will now check for available updates and prompt you to either install them on Octopi itself or in a terminal.
4. To proceed with the update, click the Apply button.
5. Octopi will download and install the updates.
6. It is advised to reboot your computer after a big update (especially if the kernel got an update).

Updating with Pacman

1. Open a terminal emulator (or press ctrl + alt + t - mod + return in Cachy’s WMs).

2. Run the following command to update the system:

   sudo pacman -Syu

3. It is advised to reboot your computer after a big update (especially if the kernel got an update).

2. Configuring Firewall (ufw)

Note

UFW is enabled by default after installation.

To configure ufw, follow these steps:

Enable

sudo ufw enable

Disable

sudo ufw disable

Allow

By default, ufw allows all incoming and outgoing traffic, you can add specific rules to the firewall to block or allow specific connections.

# For example:
sudo ufw allow ssh

Deny

# To deny a specific port, check the following example:
sudo ufw deny 80

Status

sudo ufw status verbose

Note

Be careful when configuring firewall rules, as improperly configured rules can lock you out of your own system.

Note

You can also configure it graphically using “Firewall” section in the KDE Plasma settings.

3. Enable Global Menu

For some apps like Visual Studio Code, the global menu may not work or may be attached to the parent app instead of the panel.

# To enable global menu support, run the command and restart the app.
sudo pacman -S appmenu-gtk-module libdbusmenu-glib

4. Enable AppArmor support using AppArmor.d profiles

1. Add the following kernel parameters to your Boot Manager, see Boot Manager Configuration for reference

   lsm=landlock,lockdown,yama,integrity,apparmor,bpf

2. Install apparmor and apparmord (Set of over +1500 profiles) packages

   sudo pacman -S apparmor apparmor.d-git

3. Enable/Start AppArmor service

   systemctl enable --now apparmor.service

4. Enable caching for AppArmor profiles

   /etc/apparmor/parser.conf

   ## Add the following lines:
   write-cache
   Optimize=compress-fast

   Save the file and reboot.

5. Changing the Default Shell

Currently, CachyOS uses fish as the user’s default login shell. However, you can change the default shell to whatever you like.

bash

This is the default shell on almost every Linux distribution. It is also still used as the root user’s login shell. bash has basic autocomplete functionality and easy history management. It differs from zsh and fish in that it doesn’t have the fancy customization and plugin ecosystem that both fish and zsh have.

Changing your default shell to bash

❯ chsh -s /usr/bin/bash

zsh

We provide a zsh config with commonly used plugins and configurations. It aims to have 1:1 functionality with our fish config. This is also the default shell used in MacOS.

Changing the default shell to zsh

❯ chsh -s /usr/bin/zsh

6. Updating/using tldr

Note

CachyOS uses tealdeer which is a faster Rust based implementation of the original tldr

This tool is extremely useful for those who don’t want to read much or waste time reading a help/man page.

1. Open a terminal and run the following command

   tldr --update

2. Example of using tldr:

   tldr java
     Execute a `.jar` program:
   
      java -jar filename.jar
   
   # As you can see, it's really useful and it new tools/pages get added over time