Some Shell Stuff

• We've been using the bash shell from the command line all semester. However, Chapter 13 is full of details. Be sure to read and re-read it carefully, taking notes while you do. Some people even write or highlight right in their book - if you can believe it!

• Note, in particular, such things as:

• set -x and set +x to turn script expansion tracing on and off;
• set -v and set +v to toggle script line tracing;
• set -n and set +n to toggle script execution;
• or use #! /bin/bash -xvn to set them all on;
• controlling prompt contents (especially, but not only, PS1 and PS2);
• built-in commands like alias, dirs, help, popd, pushd, and type;
• And much more! It's a big chapter.