A history searching function for linux and mac

search_commadn_history.sh

# History search helper
# usage: his query1 query2 queryn...
# example: his ssh 192 (search all ssh commands done to ips inclusing 192)
# example: his sed jsx react (search all sed commands that include "jsx" and "react")
function his() {

  # Store the full history in a variable
  # Command order: history, remove line numbers, remove leading and trailing whitespace, sort, remove duplicates
  # Note that we are using a naive way of removing the line numbers
  commandlog=$(history | grep -oE "[a-zA-Z]{1}.*" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//' | sort | uniq)

  # For every parameter provided to this function, run a case insensitive grep
  for var in "$@";do
    commandlog=$(echo "$commandlog" | grep -i "$var")
  done

  # Log out the results
  echo "$commandlog"
}