Here's an example of a profile that ksh
runs if you set the ENV environment variable as described
above for .profile:
alias rm="rm -i"
alias ll="ls -l"
export PS1='$(pwd) $ '
This profile does the following:
- Uses an alias to turn on interactive mode for the
  rm
  command.
  In interactive mode, rm asks you for confirmation before it
  deletes the file.
  The
  cp
  and
  mv
  commands also support this mode.
  
  
  
  
  
  
  
  
- Creates an alias, ll, that runs
  ls
  with the -l set.
  This gives a long listing that includes the size of the files, the
  permissions, and so on.
  
- Changes the primary prompt to include the current working directory
  (the default if you aren't root is $).
  You can also change the secondary prompt by setting PS2.
  
  
  
  
  
  
  Note that you should use single quotes instead of double quotes around the string.
  If you specify:
   
export PS1="$(pwd) $ "
   
  the pwd command is evaluated right away because double quotes
  permit command substitution;
  when you change directories, the prompt doesn't change.