N “undo” command on the Unix comand line

This was asked and answered on Stack Overflow: Equivalent of *Nix 'which' command in PowerShell?

The very first alias I made once I started customizing my profile in PowerShell was 'which'.

New-Alias which get-command

To add this to your profile, type this:

"`nNew-Alias which get-command" | add-content $profile

The `n at the start of the last line is to ensure it will start as a new line.

[script.ksh] run with "script.ksh ls"

#!/bin/ksh

OUTPUT="cmd.txt"

if [[ $# -eq 0 ]];then
  print "no command to run"
  exit
fi

# dump command being run to file
echo $@ >> $OUTPUT

# run command and output stdout to the screen and file
$@ | tee -a $OUTPUT