- [-] The rest of programs.
  - [X] yes
  - [X] ln
  - [ ] rm
  - [ ] pwd
- [ ] Manuals
- [-] flags for the programs
  - [X] ln
  - [X] cat
  - [ ] dirname
  - [ ] echo
  - [ ] mkdir
  - [ ] pwd
  - [ ] rmdir
  - [ ] rm
  - [ ] touch
  - [X] yes
- [ ] Add error handling and returning for ln