Chart from:
https://www.oreilly.com/library/view/learning-the-bash/1565923472/ch01s09.html
Table 1-6. Special Characters
| Character | Meaning | See Chapter |
|---|---|---|
| ~ | Home directory | 1 |
| ` | Command substitution (archaic) | 4 |
| # | Comment | 4 |
| $ | Variable expression | 3 |
| & | Background job | 1 |
| * | String wildcard | 1 |
| ( | Start subshell | 8 |
| ) | End subshell | 8 |
| \ | Quote next character AKA Escape | 1 |
| | | Pipe | 1 |
| [ | Start character-set wildcard | 1 |
| ] | End character-set wildcard | 1 |
| { | Start command block | 7 |
| } | End command block | 7 |
| ; | Shell command separator | 3 |
| ’ | Strong quote | 1 |
| <”> | Weak quote | 1 |
| < | Input redirect | 1 |
| > | Output redirect | 1 |
| / | Pathname directory separator | 1 |
| ? | Single-character wildcard | 1 |
| ! | Pipeline logical NOT | 5 |