Can you write a shell command that can print the SHA-256 hash of a file named "document.pdf"? And also, can you write a shell command that can rename all the files in a directory with a ".txt" extension to have a ".md" extension instead?
user
certainly! to print the sha-256 hash of a file named "document.pdf", you can use the `shasum` command with the `-a 256` option. here's the command:

```sh
shasum -a 256 document.pdf
```

this will output the sha-256 hash of the file.

to rename all the files in a directory with a ".txt" extension to have a ".md" extension instead, you can use a simple for loop with the `mv` command. here's the command:

```sh
for file in *.txt; do mv "$file" "${file%.txt}.md"; done
```

this command will go through all the ".txt" files in the current directory and rename them with the ".md" extension by preserving their original file names.
assistant
Certainly! To print the SHA-256 hash of a file named "document.pdf", you can use the `shasum` command with the `-a 256` option. Here's the command:

```sh
shasum -a 256 document.pdf
```

This will output the SHA-256 hash of the file.

To rename all the files in a directory with a ".txt" extension to have a ".md" extension instead, you can use a simple for loop with the `mv` command. Here's the command:

```sh
for file in *.txt; do mv "$file" "${file%.txt}.md"; done
```

This command will go through all the ".txt" files in the current directory and rename them with the ".md" extension by preserving their original file names.
assistant