$ echo hi
hi
$ whoami
Chenyu Zhang
$ which zcysxy
/MIT/{LIDS,IDSS}/zcysxy
$ history | tail
/US/Columbia/DSI/
/CN/Fudan/Math/
/CN/SZMS/Honor-Physics/
$ ls ~/toolbox
_.py    _.m     _.r     _.lua   _.js   
_.css   _.html  _.tex   _.md    _.yaml
_.sql   _.sh    .git    .vimrc  .vscode
$ jobs
permission denied
$ exec zcysxy.life
🛌☕️✍️🍛🍺🕺🛌
$ exit