commandline session $ 4.2.20 44 301—> cat .bashrc #export PS1=”[ 33[0;31m] $ V # ! ” export PS1=”$ V # !—> ” shellp() { pre=: post=: printf “$pr%s$pon” “$@” } $ 4.2.20 45 302—> shellp hacker cracker maker hacker cracker maker $ 4.2.20 46 303—> $ 4.2.20 2 457—> cat .bashrc #export PS1=”[ 33[0;31m] $ …