rskio/mkdocs/docs/projects/linux.md

Linux Setup

Brief

some setup guides

• by rskntroot on 2025-02-20

Debian

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
sed -i 's/^#DebianB/DebianB/' sshd_config
chmod 644 /etc/ssh/sshd_config
systemctl restart ssh
exit

=== "New Key"

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

=== "Existing Key"

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

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

sudo -i
cat <<%% >> /etc/ssh/sshd_config
###RSKIO
PubkeyAuthentication yes
AuthorizedKeysFile .ssh/authorized_keys
%%
systemctl restart ssh
exit

Docker

Setup Docker

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

curl -fsSL https://get.docker.com -o get-docker.sh
sudo sh ./get-docker.sh
sudo systemctl enable --now docker
rm -f ./get-docker.sh
sudo usermod -a -G docker $(whoami)
docker ps

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

sudo apt install bash-completion -y
cat <<%% >> ~/.bashrc
if [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
fi
%%
mkdir -p ~/.local/share/bash-completion/completions
docker completion bash > ~/.local/share/bash-completion/completions/docker
source ~/.bashrc

Tools

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

Shortcuts

• see fastfetch for more info

=== "ARM_64"

``` bash
mkdir ~/Downloads/ && cd Downloads
curl -L https://github.com/fastfetch-cli/fastfetch/releases/download/2.37.0/fastfetch-linux-aarch64.deb -o fastfetch-linux-aarch64.deb
sudo dpkg -i fastfetch-linux-aarch64.deb
cd ~
```

=== "x86_64"

``` bash
mkdir ~/Downloads/ && cd Downloads
curl -L https://github.com/fastfetch-cli/fastfetch/releases/download/2.37.0/fastfetch-linux-amd64.deb -o fastfetch-linux-amd64.deb
sudo dpkg -i fastfetch-linux-amd64.deb
cd ~
```

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