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+# lsof(8)
+
+```markdown
+lsof
+  -a ......... AND slection filters instead ORing (OR: default)
+  -p <pid> ... list open file descriptors for process
+  +fg ........ show file flags for file descripros
+  -n ......... don't convert network addr to hostnames
+  -P ......... don't convert network port to know service names
+  -i <@h[:p]>. show connections to h (hostname|ip addr) with optional port p
+```
+
+```markdown
+file flags:
+  R/W/RW ..... read/write/read-write
+  CR ......... create
+  AP ......... append
+  TR ......... truncate
+```
+
+# Examples
+
+Show open files with file flags:
+```markdown
+lsof +fg -p <pid>
+```
+
+Show open tcp connections from user:
+```markdown
+lsof -a -u $USER -i tcp
+```
+
+Show open connections to 'localhost' for user:
+```markdown
+lsof -a -u $USER -i @localhost
+```