Stick this to the wall

Twenty commands

Everything he needs for terms one and two. Nothing else — a longer card is a card he stops reading. In term four, throw this away and let him write the replacement.

pwdwhere am I?
lswhat is in this room?
ls -l…the same, with sizes and dates
cd labgo into a folder
cd ..go back up one
cd ~go home
mkdir gamesmake a new folder
nano game.pyopen the editor · Ctrl-O saves, Ctrl-X quits
cat game.pyshow a file on the screen
less big.txtread a long file · q quits
cp a.py b.pycopy a file
mv a.py b.pyrename a file, or move it
rm a.pydelete a file · there is no undo
python3 game.pyrun your program
python3the calculator · exit() leaves
wc -w letter.txtcount the words
grep dragon story.txtfind the lines with a word in them
datewhat time does it think it is?
clearwipe the screen
man lsthe manual for a command · q quits

Three keys that matter more than any command

↑: brings back the command you just typed. Use it constantly.
Tab: finishes a name you have started typing. The computer can spell better than you.
Ctrl-C: stops a program that will not stop on its own. Nothing breaks.

The command card · terms one to fourkrishpi.sreeb.dev