Make dir-perm the cwd. How?

To make the directory permission the current working directory (cwd) in Linux, you can use the `cd` command followed by the directory path and the `chmod` command to set the directory permission.

Here's an example:

1. Open the terminal and navigate to the directory you want to set as the cwd.

2. Use the `chmod` command to set the directory permission. For example, to set the permission to 755 (read, write, and execute for the owner, and read and execute for others), you can use the following command:

```
chmod 755 .
```

The `.` at the end of the command specifies the current directory.

3. Use the `cd` command to set the current working directory to the directory you just modified:

```
cd .
```

This will set the current working directory to the directory you just modified.

Note: It's important to be careful when modifying directory permissions, as it can affect the security and functionality of your system.