$ curl cheat.sh/
# dolphin
# KDE's file manager to manage files and directories.
# More information: <https://apps.kde.org/dolphin/>.

# Launch the file manager:
dolphin

# Open specific directories:
dolphin path/to/directory1 path/to/directory2 ...

# Open with specific files or directories selected:
dolphin --select path/to/file_or_directory1 path/to/file_or_directory2 ...

# Open a new window:
dolphin --new-window

# Open specific directories in split view:
dolphin --split path/to/directory1 path/to/directory2

# Launch the daemon (only required to use the DBus interface):
dolphin --daemon

# Display help:
dolphin --help

$
Follow @igor_chubin cheat.sh tldr