docs: update usages for all

Signed-off-by: Luca Di Maio <[email protected]>

docs/usage/distrobox-assemble.md

@@ -16,7 +16,7 @@ The manifest file by default is `./distrobox.ini`, but can be specified using th
 **distrobox assemble**
 
 	--file:			path to the distrobox manifest/ini file
-	--name/-n:			run against a single entry in the manifest/ini file
+	--name/-n:		run against a single entry in the manifest/ini file
 	--replace/-R:		replace already existing distroboxes with matching names
 	--dry-run/-d:		only print the container manager command generated
 	--verbose/-v:		show more verbosity

docs/usage/distrobox-create.md

@@ -33,6 +33,7 @@ graphical apps (X11/Wayland), and audio.
 	--pre-init-hooks:	additional commands to execute prior to container initialization
 	--init/-I:		use init system (like systemd) inside the container.
 				this will make host's processes not visible from within the container. (assumes --unshare-process)
+				may require additional packages depending on the container image: https://github.com/89luca89/distrobox/blob/main/docs/useful_tips.md#using-init-system-inside-a-distrobox
 	--nvidia:		try to integrate host's nVidia drivers in the guest
 	--unshare-devsys:          do not share host devices and sysfs dirs from host
 	--unshare-ipc:          do not share ipc namespace with host

docs/usage/distrobox-enter.md

@@ -17,7 +17,7 @@ If using it inside a script, an application, or a service, you can specify the
 **distrobox enter**
 
 	--name/-n:		name for the distrobox						default: my-distrobox
-	--/-e:			end arguments execute the rest as command to execute at login	default: bash -l
+	--/-e:			end arguments execute the rest as command to execute at login	default: su ${USER}
 	--no-tty/-T:		do not instantiate a tty
 	--no-workdir/-nw:	always start the container from container's home directory
 	--additional-flags/-a:	additional flags to pass to the container manager command

docs/usage/distrobox-ephemeral.md

@@ -18,7 +18,7 @@ when the command is terminated.
 				specify it through the DBX_SUDO_PROGRAM env variable, or 'distrobox_sudo_program' config variable)
 	--verbose/-v:		show more verbosity
 	--help/-h:		show this message
-	--/-e:			end arguments execute the rest as command to execute at login	default: bash -l
+	--/-e:			end arguments execute the rest as command to execute at login	default: su ${USER}
 	--version/-V:		show version
 
 # EXAMPLES

docs/usage/distrobox-export.md

@@ -26,6 +26,7 @@ automatically be launched from the container it is exported from.
 				Defaults to (on \$container_name)
 	--export-path/-ep:	path where to export the binary
 	--extra-flags/-ef:	extra flags to add to the command
+	--enter-flags/-nf:	flags to add to distrobox-enter
 	--sudo/-S:		specify if the exported item should be run as sudo
 	--help/-h:		show this message
 	--verbose/-v:		show more verbosity

docs/usage/distrobox-upgrade.md

@@ -14,7 +14,7 @@ an upgrade using the container's package manager.
 
 	--help/-h:		show this message
 	--all/-a:		perform for all distroboxes
-	--running:		perform only on running distroboxes
+	--running:		perform only for running distroboxes
 	--root/-r:		launch podman/docker/lilipod with root privileges. Note that if you need root this is the preferred
 				way over "sudo distrobox" (note: if using a program other than 'sudo' for root privileges is necessary,
 				specify it through the DBX_SUDO_PROGRAM env variable, or 'distrobox_sudo_program' config variable)