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first things to do

# apt update && apt install sudo vim
# update-alternatives --config editor
# adduser tchung sudo

Disable vim automatic visual mode

# vi ~/.vimrc
set mouse-=a

favorite aliases

# vi .bashrc
alias l='ls -CF'
alias la='ls -A'
alias ll='ls -l'
alias ls='ls --color=auto'
alias rm='rm -i'
alias cp='cp -i'
alias mv='mv -i'
alias egrep='egrep --color=auto'
alias fgrep='fgrep --color=auto'
alias grep='grep --color=auto'

secure uri for buster

# vi /etc/apt/sources.list
## secure uri for buster
deb              buster main
deb              buster-updates main
deb     buster/updates main

neofetch for buster

$ neofetch --disable model --ascii_colors 1 1 1 1 1 1