linuxexpert-practice-labs/labs/lpic-1/105-1-shell-environment/README.md

LPIC-1 105.1: Customizing the shell environment

A personal bin directory in PATH, a shell function kept in ~/.bashrc, and the skeleton files new users get.

Before you start

The lab creates user alice (password Lab-Pass-1). Do tasks 1 and 2 as alice: log in as her, or run sudo -iu alice.

Tasks

1. As alice, make sure ~/bin is in her PATH permanently, and put an executable script called hello there that prints a greeting. A new login shell must run it by name: sudo -iu alice hello.
2. Write the mkcd function (make a directory, then change into it) and keep it in alice's ~/.bashrc, so that it works in every new interactive shell of hers.
3. Put a file called welcome.txt in /etc/skel, then create user newbie with useradd -m, and check that the file is in the new home directory.

Hints

• echo "$PATH", command -v hello; ~/.profile or ~/.bash_profile, and what the distribution's own startup files already do with ~/bin.
• #!/bin/bash, chmod +x.
• mkcd() { mkdir -p "$1" && cd "$1"; }; test in a new shell with type mkcd. A script can't do the same: why?
• ls -A /etc/skel, useradd -m, ls -la ~newbie.