What are other sort command options?

Here are some commonly used options for the sort command:

-r: Sort in reverse order (descending).
```
sort -r file.txt
```
-n: Sort numerically instead of lexicographically.
```
sort -n file.txt
```
-k: Specify a key (field) to sort by. You can define the starting and ending fields.
```
sort -k2,2 file.txt  # Sort by the second field
```
-u: Output only the first of an equal run (remove duplicates).
```
sort -u file.txt
```
-o: Write the output to a specified file instead of standard output.
```
sort -o sorted.txt file.txt
```
-f: Ignore case when sorting.
```
sort -f file.txt
```
-b: Ignore leading blanks when sorting.
```
sort -b file.txt
```
-t: Specify a custom delimiter (as mentioned earlier).
```
sort -t, -k1,1 file.csv
```
-M: Sort by month name.
```
sort -M file.txt
```

These options can be combined to achieve more complex sorting behaviors. For example, you can sort numerically in reverse order while ignoring case and specifying a custom delimiter.