Luca Nerlich, tech

Table of Contents

Over the years I have updated my .bash_profile and my .gitconfig with useful command aliases. I will share the most interesting ones and roughly explain these in this post.


Note, I am using oh-my-zsh as a command shell / bash alternative. The following aliases and functions work well on whatever shell you are using.

Neatly display all files and directories in the current directory.

alias ll='ls -FGlAhp'

Create intermediate directories as needed and log each during creation.

alias mkdir='mkdir -pv'

Prompt for each file which would be overwritten and log each file moved.

alias mv='mv -iv'

The following aliases really speed up your change directory usage.

alias cd..='cd ../' # Go back 1 directory level.
alias ..='cd ../' # Go back 1 directory level.
alias cd2='cd ../../' # Go back 2 directory levels.
alias cd3='cd ../../../' # Go back 3 directory levels.

Open the current directory in finder.

alias f='open .'

Quick and easy docker-compose aliases.

alias dcu='docker-compose up -d'
alias dcd='docker-compose down'
alias dcl='docker-compose logs -f'
alias dcb='docker-compose build'

Sometimes one just needs a quick and dirty dns flush.

alias flushdns='sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder; say DNS cache flushed'

Extract most know archives with one command

extract () {
if [ -f $1 ] ; then
case $1 in
*.tar.bz2) tar xjf $1 ;;
*.tar.gz) tar xzf $1 ;;
*.bz2) bunzip2 $1 ;;
*.rar) unrar e $1 ;;
*.gz) gunzip $1 ;;
*.tar) tar xf $1 ;;
*.tbz2) tar xjf $1 ;;
*.tgz) tar xzf $1 ;;
*.zip) unzip $1 ;;
*.Z) uncompress $1 ;;
*.7z) 7z x $1 ;;
*) echo "'$1' cannot be extracted via extract()" ;;
echo "'$1' is not a valid file"

Display your local ipv4

alias myip="ifconfig | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*' | grep -v ''"

Display useful host related information.

ii() {
echo -e "\nYou are logged on ${RED}$HOST"
echo -e "\nAdditionnal information:$NC " ; uname -a
echo -e "\n${RED}Users logged on:$NC " ; w -h
echo -e "\n${RED}Current date :$NC " ; date
echo -e "\n${RED}Machine stats :$NC " ; uptime
echo -e "\n${RED}Public facing IP Address :$NC " ;myip


The following git aliases are my favourite implementation and formatting for the git log command.

# with date
ls = log --pretty=format:"%C(yellow)%h\\ %C(green)%cd%C(red)%d\\ %Creset%s%C(green)\\ [%cn]%C(yellow)\\ [%an]" --decorate
# with age of last commit
ld = log --pretty=format:"%C(yellow)%h\\ %C(green)%cd\\ %C(yellow)%ad%C(red)%d\\ %Creset%s%C(green)\\ [%cn]%C(yellow)\\ [%an]" --decorate --date=relative
# verbose, with file changes
ll = log --pretty=format:"%C(yellow)%h\\ %C(green)%cd%C(red)%d\\ %Creset%s%C(green)\\ [%cn]%C(yellow)\\ [%an]" --decorate --numstat

Example git ls: git_ls Example git ld: git_ld Example git ll: git_ll

Download my .gitconfig here.


The following blocks are two examples of my ~/.ssh/config.

This 'forces" ssh to send/use your defined public key on every connection.

Host *
AddKeysToAgent yes
UseKeychain yes
IdentityFile ~/.ssh/user

This is an example on how to save ssh connections. Specifing these, you are able to connect to the host via ssh name.

Host name
User user
IdentityFile ~/.ssh/user

Thanks for reading!


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