share: add page (#15676)

pages/sunos/share.md

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+# share
+
+> Make local resource/filesystem available for mounting by remote systems.
+> More information: <https://docs.oracle.com/cd/E36784_01/html/E36825/gntjt.html>.
+
+- List all currently shared file systems:
+
+`share`
+
+- Share a directory with read/write access:
+
+`share -F nfs -o rw {{/path/to/directory}}`
+
+- Share a directory with read-only access:
+
+`share -F nfs -o ro {{/path/to/directory}}`
+
+- Share a directory with specific options (e.g., allow root access from a specific host):
+
+`share -F nfs -o rw,root={{hostname}} {{/path/to/directory}}`
+
+- Make sharing persistent by adding entries to `/etc/dfs/dfstab`:
+
+`echo "share -F nfs -o rw {{/path/to/directory}}" >> /etc/dfs/dfstab`