How to set the sticky bit?

To set the sticky bit on a directory in Linux, you can use the chmod command. Here are the steps to do so:

1. Using Symbolic Mode

You can set the sticky bit using the +t option with the chmod command.

Syntax:
```
chmod +t directory_name
```
Example:
To set the sticky bit on a directory named shared_dir, you would run:
```
chmod +t shared_dir
```

2. Using Numeric Mode

You can also set the sticky bit using numeric mode by adding a 1 at the beginning of the permission number.

Syntax:
```
chmod 1777 directory_name
```
Example:
To set the sticky bit along with full permissions (read, write, and execute) for user, group, and others on shared_dir, you would run:
```
chmod 1777 shared_dir
```

3. Verifying the Sticky Bit

After setting the sticky bit, you can verify that it has been applied by using the ls -l command:

ls -ld directory_name

The output will show the permissions, and you should see a t in the execute position for others if the sticky bit is set.
Example Output:
```
drwxrwxrwt  2 user group 4096 Jan 1 12:00 shared_dir
```
- The t at the end of drwxrwxrwt indicates that the sticky bit is set.

Summary

To set the sticky bit on a directory, you can use either symbolic mode (chmod +t directory_name) or numeric mode (chmod 1777 directory_name). After setting it, verify the permissions to ensure the sticky bit is applied correctly.