Add aliases

Signed-off-by: Severin Kaderli <severin@kaderli.dev>

system/.config/custom/aliases

@@ -23,7 +23,7 @@ alias lt="ls --tree"
 # Alias for using bat as cat replacement
 alias cat="bat"
 
-# Aliases to folders
+# Aliases to access folders
 if [ -d "${HOME}/dev/projects" ]; then
     alias pj='cd ${HOME}/dev/projects'
 fi
@@ -44,4 +44,5 @@ fi
 alias e='code'
 
 # Other aliases
-alias timestamp='date +%s'
+alias timestamp='date +%s'
+alias interfaces='ip -o link show | cut -d ":" -f 2'