rskio/mkdocs/docs/notes/linux.md

Linux Setup

Brief

some setup guides

• by rskntroot on 2025-02-20

Preferences

SSH

• see K4YT3X's Hardened OpenSSH Server Configuration

sudo -i

cd /etc/ssh/
mv sshd_config sshd_config.backup
curl https://raw.githubusercontent.com/k4yt3x/sshd_config/master/sshd_config -o ./sshd_config
chmod 644 /etc/ssh/sshd_config
cat <<%% >> /etc/ssh/sshd_config
# Enable Public Key Auth
PubkeyAuthentication yes
AuthorizedKeysFile .ssh/authorized_keys
%%
systemctl restart ssh
exit

Auth

=== "Existing Key"

``` bash
key="ecdsa-sha2-nistp256 ASASDASDFsomekey user@whatever"
```

``` bash
mkdir -p ~/.ssh && echo ${key} >> ~/.ssh/authorized_keys
```

=== "New Key"

``` bash
ssh-keygen -t ecdsa
cat id_ecdsa.pub >> ~/.ssh/authorized_keys
```

Docker

• see https://docs.docker.com/engine/install/ubuntu/

sudo -i
curl -fsSL https://get.docker.com | sh
systemctl enable --now docker

usermod -aG docker ${SOME_USER}
docker ps

Completion

• see https://docs.docker.com/config/completion/

=== "docker"

``` bash
mkdir -p ~/.local/share/bash-completion/completions
docker completion bash > ~/.local/share/bash-completion/completions/docker
source ~/.bashrc
```

=== "bash"

``` bash
sudo apt install bash-completion -y
```

``` bash
cat <<%% >> ~/.bashrc
if [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
fi
%%
```

Tools

=== "Debian"

``` bash
sudo apt install -y \
  curl \
  htop \
  iputils-ping \
  jq \
  tcpdump \
  traceroute \
  vim
```

=== "Fedora"

``` bash
sudo dnf install -y \
  htop \
  sensors
```

Shortcuts

fastfetch

• see fastfetch for more info

url="https://github.com/fastfetch-cli/fastfetch/releases/download/2.47.0/fastfetch-linux-amd64.deb"

mkdir -p ~/downloads/ && cd ~/downloads
curl -fsSL ${url} -o fastfetch.deb
sudo dpkg -i ./fastfetch.deb

Profile

cat <<%% >> ~/.bashrc
# RSKIO
alias ..="cd .."
alias ...="cd ..."
alias q="exit"
alias ff="fastfetch"
%%
source ~/.bashrc