How can I search for file content in the "AppVM"?

How can I search for file content in the “AppVM”?
Not in the terminal but in the file manager?
If you use a file manager other than “Thunar” for searching, how do you install it so that it can be used in the “AppVM”?

Nautilus file manager does not start, what kind of error is this?

sudo nautilus
** Message: 19:06:57.536: Connecting to org.freedesktop.Tracker3.Miner.Files
libEGL warning: DRI2: failed to authenticate

(org.gnome.Nautilus:3126): dconf-WARNING **: 19:06:57.736: failed to commit changes to dconf: Failed to execute child process “dbus-launch” (No such file or directory)

(org.gnome.Nautilus:3126): dconf-WARNING **: 19:06:57.737: failed to commit changes to dconf: Failed to execute child process “dbus-launch” (No such file or directory)

(org.gnome.Nautilus:3126): Gtk-WARNING **: 19:06:57.743: Unable to acquire session bus: Failed to execute child process “dbus-launch” (No such file or directory)

(org.gnome.Nautilus:3126): dconf-WARNING **: 19:06:57.796: failed to commit changes to dconf: Failed to execute child process “dbus-launch” (No such file or directory)

(org.gnome.Nautilus:3126): dconf-WARNING **: 19:06:57.796: failed to commit changes to dconf: Failed to execute child process “dbus-launch” (No such file or directory)

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.120: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.120: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.120: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.120: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

** (org.gnome.Nautilus:3126): WARNING **: 19:06:58.121: Error creating proxy Failed to execute child process “dbus-launch” (No such file or directory)

** (org.gnome.Nautilus:3126): WARNING **: 19:06:58.121: Error creating proxy Failed to execute child process “dbus-launch” (No such file or directory)

** (org.gnome.Nautilus:3126): WARNING **: 19:06:58.121: Error creating proxy Failed to execute child process “dbus-launch” (No such file or directory)

** (org.gnome.Nautilus:3126): WARNING **: 19:06:58.121: Unable to create connection for session-wide Tracker indexer: Failed to execute child process “dbus-launch” (No such file or directory)

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.122: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.122: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

** (org.gnome.Nautilus:3126): WARNING **: 19:06:58.123: Unable to get contents of the bookmarks file: Error opening file /root/.gtk-bookmarks: No such file or directory

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.127: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.127: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.579: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.579: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.579: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.579: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.579: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.579: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.579: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.586: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

** (org.gnome.Nautilus:3126): CRITICAL **: 19:06:58.586: update_dbus_opened_locations: assertion ‘dbus_object_path’ failed

(org.gnome.Nautilus:3126): dconf-WARNING **: 19:06:58.586: failed to commit changes to dconf: Failed to execute child process “dbus-launch” (No such file or directory)

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.587: g_dbus_connection_register_object: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.587: g_dbus_connection_register_object: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.587: g_dbus_connection_register_object: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.587: g_dbus_connection_register_object: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.587: g_dbus_connection_register_object: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.587: g_dbus_connection_register_object: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:06:58.600: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:10.596: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:10.597: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.537: g_dbus_connection_register_object: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.537: g_dbus_connection_register_object: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.537: g_dbus_connection_register_object: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.537: g_dbus_connection_register_object: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.537: g_dbus_connection_register_object: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.537: g_dbus_connection_register_object: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.537: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.537: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.537: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.537: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.538: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.538: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.538: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.538: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.538: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.538: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.539: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.539: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.555: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.555: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.555: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.555: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:12.556: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed

(org.gnome.Nautilus:3126): GLib-GIO-CRITICAL **: 19:07:14.883: g_dbus_connection_emit_signal: assertion ‘object_path != NULL && g_variant_is_object_path (object_path)’ failed
Segmentation fault

I don’t use nautilus but why do you use sudo nautilus instead of just nautilus ??

Try without sudo.