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A common action is to want to mount or unmount a USB stick into the WSL instance. This is usually mounted as D: on Windows and I want to mount it as /mnt/d.
Create a script called mount-d-drive.sh.
#!/usr/bin/env bash
# Mount the current D: drive on /mnt/d as the current user
user=$(id -ur)
group=$(id -gr)
mp="/mnt/d"
sudo mkdir -p ${mp}
sudo mount -t drvfs D:\\ ${mp} -o uid=${user},gid=${group}
Likewise the unmounting script, unmount-d-drive.sh.
#!/usr/bin/env bash
# Unmount whatever is on /mnt/d
mp="/mnt/d"
sudo umount ${mp}
Set the executable bit on both scripts. Get both scripts onto your PATH. What I do is have a git repo that includes these types of files in a bin sub-directory. Then I soft link the directory ${HOME}/.local/bin to that sub-directory.
Then add the aliases to ${HOME}/.bashrc. I like to have a file local_bashrc in the same git repo as the scripts, so I can keep the definitions in there.
In local_bashrc
# Local aliases
alias dmount='mount-d-drive.sh'
alias dunmount='unmount-d-drive.sh'
And in ~/.bashrc
# Source version controlled definitions
. ${HOME}/workspace/miscellaneous/local_bashrc
Create a new shell and you will have the aliases dmount and dunmount available to you. Note that both use sudo so be prepared to enter your password when you use the scripts.