ubuntu-server-post-install.md

ubuntu server post install

• tune bashrc
• automatic disk decryption
• docker
• inotify
• dircolors and prompt
  • workstation
  • server
• disable systemd-resolved

---

tune bashrc

/etc/bash.bashrc

# custom

alias rm='rm -i'
alias cp='cp -i'
alias mv='mv -i'

export HISTSIZE=1000000
export HISTFILESIZE=2000000

export PATH=$PATH:/opt/node/bin

export DOTNET_ROOT=/opt/dotnet
export PATH=$PATH:$DOTNET_ROOT
export DOTNET_CLI_TELEMETRY_OPTOUT='1'
export PATH=$PATH:~/.dotnet/tools

# python modules
export PATH=$PATH:~/.local/bin

export PATH=$PATH:/nas/scripts

automatic disk decryption

• luks keyfile for automount

docker

• disable iptables

inotify

• tune inotify

dircolors and prompt

follow to set a directory color a little brigther than the effect of blue on purple terminal background

• ~/.dircolors

DIR 00;36
LINK 00;33

workstation

• root ~/.bashrc

PS1='${debian_chroot:+($debian_chroot)}\[\033[48;5;27m\]\[\033[01;37m\]\u@\h\[\033[00m\]:\[\033[00;36m\]\w\[\033[00m\]\$ '

• user: ~/.bashrc

PS1='${debian_chroot:+($debian_chroot)}\[\033[01;37m\]\u\[\033[00m\]@\[\033[38;5;11m\]\h\[\033[00m\]:\[\033[00;36m\]\w\[\033[00m\]\$ '

server

• root ~/.bashrc

PS1='${debian_chroot:+($debian_chroot)}\[\033[48;5;1m\]\[\033[01;37m\]\u@\h\[\033[00m\]:\[\033[00;36m\]\w\[\033[00m\]\$ '

• user: ~/.bashrc

PS1='${debian_chroot:+($debian_chroot)}\[\033[01;37m\]\u\[\033[00m\]@\[\033[48;5;9m\]\[\033[38;5;15m\]\h\[\033[00m\]:\[\033[00;36m\]\w\[\033[00m\]\$ '

disable systemd-resolved

systemctl disable systemd-resolved
systemctl stop systemd-resolved
rm -f /etc/resolv.conf

create your own /etc/resolv.conf

nameserver xxx.yyy.zzz.www
search example.com

edit /etc/NetworkManager/NetworkManager.conf to stop update resolv.conf

[main]
dns=none